{"id":4789,"date":"2024-07-08T02:57:38","date_gmt":"2024-07-08T02:57:38","guid":{"rendered":"https:\/\/broachingmach.com\/?p=4789"},"modified":"2026-11-02T13:48:25","modified_gmt":"2026-11-02T05:48:25","slug":"keyway-broaching-the-complete-guide","status":"publish","type":"post","link":"https:\/\/broachingmach.com\/pt\/keyway-broaching-the-complete-guide\/","title":{"rendered":"Keyway Broaching: How to Broach a Keyway (Complete Guide)"},"content":{"rendered":"<p class=\"wp-block-paragraph\">Knowing <strong>how to broach a keyway<\/strong> starts with matching the tool to the drawing and the bore. A guided push broach cuts an internal slot as the press drives it through the workpiece. Depending on the tool design, reaching the specified depth may take one pass or several passes with shims. The correct sequence comes from the selected tooling, not from a universal speed or shim rule.<\/p><div id=\"ez-toc-container\" class=\"ez-toc-v2_0_89 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<div class=\"ez-toc-title\" style=\"cursor:inherit\">\u00cdndice<\/div>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Alternar o \u00edndice\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Alternar<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewbox=\"0 0 24 24\" version=\"1.2\" baseprofile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 eztoc-toggle-hide-by-default' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/broachingmach.com\/pt\/keyway-broaching-the-complete-guide\/#Table_of_Contents\" >\u00cdndice<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/broachingmach.com\/pt\/keyway-broaching-the-complete-guide\/#How_to_Broach_a_Keyway_The_Basic_Process\" >How to Broach a Keyway: The Basic Process<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/broachingmach.com\/pt\/keyway-broaching-the-complete-guide\/#Choose_the_Keyway_Broach_Bushing_and_Press\" >Choose the Keyway Broach, Bushing, and Press<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/broachingmach.com\/pt\/keyway-broaching-the-complete-guide\/#Start_with_the_drawing\" >Start with the drawing<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/broachingmach.com\/pt\/keyway-broaching-the-complete-guide\/#Match_the_tool_and_guide\" >Match the tool and guide<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/broachingmach.com\/pt\/keyway-broaching-the-complete-guide\/#Check_press_capacity_and_travel\" >Check press capacity and travel<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/broachingmach.com\/pt\/keyway-broaching-the-complete-guide\/#Prepare_the_Workpiece_and_Setup\" >Prepare the Workpiece and Setup<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/broachingmach.com\/pt\/keyway-broaching-the-complete-guide\/#Check_the_bore_and_support_faces\" >Check the bore and support faces<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/broachingmach.com\/pt\/keyway-broaching-the-complete-guide\/#Assemble_and_align\" >Assemble and align<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/broachingmach.com\/pt\/keyway-broaching-the-complete-guide\/#Make_the_Cut_and_Inspect_the_Keyway\" >Make the Cut and Inspect the Keyway<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/broachingmach.com\/pt\/keyway-broaching-the-complete-guide\/#Press_the_broach_through\" >Press the broach through<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/broachingmach.com\/pt\/keyway-broaching-the-complete-guide\/#Add_a_shim_only_when_specified\" >Add a shim only when specified<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/broachingmach.com\/pt\/keyway-broaching-the-complete-guide\/#Deburr_and_verify\" >Deburr and verify<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/broachingmach.com\/pt\/keyway-broaching-the-complete-guide\/#Single-Pass_and_Multi-Pass_Keyway_Broaching\" >Single-Pass and Multi-Pass Keyway Broaching<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/broachingmach.com\/pt\/keyway-broaching-the-complete-guide\/#Troubleshoot_the_Setup\" >Troubleshoot the Setup<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/broachingmach.com\/pt\/keyway-broaching-the-complete-guide\/#When_to_Consider_Another_Method\" >When to Consider Another Method<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/broachingmach.com\/pt\/keyway-broaching-the-complete-guide\/#Keyway_Broaching_FAQ\" >Keyway Broaching FAQ<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/broachingmach.com\/pt\/keyway-broaching-the-complete-guide\/#Can_a_keyway_be_broached_with_a_press\" >Can a keyway be broached with a press?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/broachingmach.com\/pt\/keyway-broaching-the-complete-guide\/#Does_every_keyway_broach_need_a_shim\" >Does every keyway broach need a shim?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/broachingmach.com\/pt\/keyway-broaching-the-complete-guide\/#How_do_I_choose_the_keyway_depth\" >How do I choose the keyway depth?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/broachingmach.com\/pt\/keyway-broaching-the-complete-guide\/#Can_the_same_method_make_a_blind_keyway\" >Can the same method make a blind keyway?<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/broachingmach.com\/pt\/keyway-broaching-the-complete-guide\/#Plan_Your_Keyway_Broaching_Job\" >Plan Your Keyway Broaching Job<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/broachingmach.com\/pt\/keyway-broaching-the-complete-guide\/#References\" >References<\/a><\/li><\/ul><\/nav><\/div>\n\n\n\n\n<p class=\"wp-block-paragraph\">This guide covers a through-bore keyway made with a guided push broach, then explains where production broaches and blind-hole methods differ. It is a planning guide: use the tool and press manufacturers&#39; instructions and the part drawing for the actual setup.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"table-of-contents\"><span class=\"ez-toc-section\" id=\"Table_of_Contents\"><\/span>\u00cdndice<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<ul class=\"wp-block-list\"><li><a href=\"#how-to-broach-a-keyway-the-basic-process\">How to Broach a Keyway: The Basic Process<\/a><\/li><li><a href=\"#choose-the-keyway-broach-bushing-and-press\">Choose the Keyway Broach, Bushing, and Press<\/a><\/li><li><a href=\"#prepare-the-workpiece-and-setup\">Prepare the Workpiece and Setup<\/a><\/li><li><a href=\"#make-the-cut-and-inspect-the-keyway\">Make the Cut and Inspect the Keyway<\/a><\/li><li><a href=\"#single-pass-and-multi-pass-keyway-broaching\">Single-Pass and Multi-Pass Keyway Broaching<\/a><\/li><li><a href=\"#troubleshoot-the-setup\">Troubleshoot the Setup<\/a><\/li><li><a href=\"#when-to-consider-another-method\">When to Consider Another Method<\/a><\/li><li><a href=\"#keyway-broaching-faq\">Keyway Broaching FAQ<\/a><\/li><li><a href=\"#plan-your-keyway-broaching-job\">Plan Your Keyway Broaching Job<\/a><\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"how-to-broach-a-keyway-the-basic-process\"><span class=\"ez-toc-section\" id=\"How_to_Broach_a_Keyway_The_Basic_Process\"><\/span>How to Broach a Keyway: The Basic Process<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A keyway broach is a cutting tool with a succession of teeth. As the tool moves axially through a prepared bore, the teeth progressively remove material from the side of the hole. The resulting slot receives a key that joins the hub to a shaft. A guide bushing supports and locates many push-type keyway broaches, but other tool designs use different guidance.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For a typical guided set, the sequence is to identify the required keyway dimensions, choose a compatible broach and bushing, support and align the workpiece, lubricate the tool, and press it through. Clean the tool after the pass. If that specific tool requires further passes, add the prescribed shim and repeat. Finally, deburr and inspect the slot against the drawing.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Arc Euro Trade&#39;s product guidance describes this bushing-and-shim method for its sets. Chisen&#39;s tooling instructions distinguish multi-pass sets from one-pass and production keyway broaches. That distinction matters: a shimmed set should not be treated as though every tool finishes its full depth in a single stroke.<\/p>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table><thead><tr><th>Question before cutting<\/th><th>What to establish<\/th><\/tr><\/thead><tbody><tr><td>What is the finished feature?<\/td><td>Drawing requirements for width, depth, position, tolerance and length.<\/td><\/tr><tr><td>What is the starting hole?<\/td><td>Bore diameter, condition and whether the tool has a clear exit.<\/td><\/tr><tr><td>Which tooling is being used?<\/td><td>Broach width, compatible bushing, specified cutting length and shim sequence.<\/td><\/tr><tr><td>Can the setup carry the job?<\/td><td>Press capacity, travel, workpiece support, alignment and clearance.<\/td><\/tr><tr><td>How will the result be accepted?<\/td><td>Suitable measuring equipment and the drawing&#39;s inspection criteria.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"choose-the-keyway-broach-bushing-and-press\"><span class=\"ez-toc-section\" id=\"Choose_the_Keyway_Broach_Bushing_and_Press\"><\/span>Choose the Keyway Broach, Bushing, and Press<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"start-with-the-drawing\"><span class=\"ez-toc-section\" id=\"Start_with_the_drawing\"><\/span>Start with the drawing<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Identify the required keyway width and tolerance before selecting a broach. Confirm how the drawing defines depth: a radial depth, an over-pin measurement, or another inspection dimension may require a different checking method. Do not assume that a nominal bore size alone defines every requirement on a particular part.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Record the bore diameter and length of cut. A tool must fit the bore and be suitable for the length of material it will engage. The shape of the workpiece also matters: a thin hub, an interrupted bore or a part with an uneven support face needs a fixture assessed for that geometry. Discuss unusual workpieces with the tooling supplier before committing to a standard set.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"match-the-tool-and-guide\"><span class=\"ez-toc-section\" id=\"Match_the_tool_and_guide\"><\/span>Match the tool and guide<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Select a broach for the specified width and tolerance, then select a bushing that fits both the prepared bore and the broach system. A bushing that fits the hole but has the wrong guide slot is not a suitable match. IBT Thiermann&#39;s instructions for its push broaches identify the bore as the basis for bushing selection and the required keyway width as the basis for broach selection; the tool and bushing types also have to correspond.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Check the manufacturer&#39;s stated cutting-length range, guidance and required shims. Arc Euro Trade notes that the length of cut for its set must not exceed the bushing&#39;s supporting length. This is a set-specific instruction, but the broader lesson is to check the limits of the actual assembly rather than judging suitability by the broach width alone.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For an overview of available tooling configurations, see our <a href=\"https:\/\/broachingmach.com\/pt\/keyway-broaching-set-guide\/\">keyway broaching set guide<\/a>. A set can be convenient for varied jobs; a dedicated production tool may be a better starting point when the same feature will be repeated. The comparison depends on the drawing, material, volume and the supplier&#39;s tooling proposal.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"check-press-capacity-and-travel\"><span class=\"ez-toc-section\" id=\"Check_press_capacity_and_travel\"><\/span>Check press capacity and travel<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The press must be suitable for the required force and the travel of the assembled job. Request a force recommendation for the particular workpiece material, keyway, cutting length and tool. Do not size a press from the width of the keyway alone, or assume a force value from a different material applies unchanged.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Check the available opening, stroke and clearance beneath the workpiece before setting up. The broach must be supported and have a clear path through the part; the exiting tool must not strike the table or another obstruction. Follow the press manufacturer&#39;s operating instructions and guarding requirements. Our <a href=\"https:\/\/broachingmach.com\/pt\/broaching-press-guide\/\">broaching press guide<\/a> discusses press selection in more detail.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"prepare-the-workpiece-and-setup\"><span class=\"ez-toc-section\" id=\"Prepare_the_Workpiece_and_Setup\"><\/span>Prepare the Workpiece and Setup<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"check-the-bore-and-support-faces\"><span class=\"ez-toc-section\" id=\"Check_the_bore_and_support_faces\"><\/span>Check the bore and support faces<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Start with a bore produced to the drawing and compatible with the selected guide. Remove loose chips and burrs from the bore, the workpiece support face, the bushing and the fixture. Debris trapped under the part or bushing can affect how the assembly sits and makes a useful alignment check harder.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Support the workpiece on a stable fixture appropriate to its shape. Confirm that the tool can exit freely and that the fixture does not interfere with the intended slot. If the component can rock, tilt or move under load, resolve the support problem before cutting. Clamping must suit the part; an arrangement that works for a thick hub is not automatically appropriate for a thin or delicate component.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Arc Euro Trade&#39;s guidance emphasizes a square, rigid setup and alignment between the ram, broach and workpiece. It also discusses support and limits for its bushings. Apply those instructions to the product they describe and seek the relevant supplier&#39;s instructions for any different setup.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"assemble-and-align\"><span class=\"ez-toc-section\" id=\"Assemble_and_align\"><\/span>Assemble and align<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Place the selected bushing in the bore and insert the matching broach in its guide slot. Orient the slot to the keyway position required by the drawing. The tool should enter the guide as intended by its manufacturer; forcing a mismatch can damage the components before the cut begins.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Position the assembly beneath the ram so the load is applied along the intended travel path. Inspect the alignment of ram, broach and guide before applying load. IBT Thiermann specifically identifies ram centering as a way to avoid drift with its guided push tools. Use the approved adapter or fixture if the tool or press manufacturer specifies one.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Apply the cutting lubricant recommended for the workpiece and tool. Lubrication is not a substitute for correct alignment, support or a sharp tool. Keep the working area clear and follow the equipment&#39;s operating and safety instructions; do not reach into the cutting area while the press is operating.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"make-the-cut-and-inspect-the-keyway\"><span class=\"ez-toc-section\" id=\"Make_the_Cut_and_Inspect_the_Keyway\"><\/span>Make the Cut and Inspect the Keyway<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"press-the-broach-through\"><span class=\"ez-toc-section\" id=\"Press_the_broach_through\"><\/span>Press the broach through<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Once the setup is secure and aligned, make the pass according to the press and tooling instructions. Observe the operation from the designated safe position. If the assembly shifts, alignment is lost, or the machine behaves unexpectedly, stop the operation and follow the equipment&#39;s safe stopping procedure. Do not force a misaligned setup through the work.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">After the tool has passed through and the equipment is safe to access, remove chips from the broach using the method recommended by its supplier. Inspect the tool and guide before any subsequent pass. Clean chips from the workpiece and fixture too, so that they do not prevent the assembly from seating consistently.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"add-a-shim-only-when-specified\"><span class=\"ez-toc-section\" id=\"Add_a_shim_only_when_specified\"><\/span>Add a shim only when specified<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">For a multi-pass set, place the specified shim behind the broach in the guide as directed by the manufacturer, then repeat the supported, lubricated pass. Some sets require more than one shim arrangement. The correct sequence is a property of that broach and bushing, not a general adjustment to be improvised until the key happens to fit.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Chisen describes inserting shims as required for standard-depth keyways with its sets, while its one-pass instructions do not use shims. Keep each tool with the compatible guide and shim information. If a shim is missing, damaged or unidentified, confirm the replacement with the supplier before continuing.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"deburr-and-verify\"><span class=\"ez-toc-section\" id=\"Deburr_and_verify\"><\/span>Deburr and verify<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">After the final pass, deburr and clean the part using a method appropriate to the drawing. Inspect keyway width, depth and location using the drawing&#39;s specified datums, tolerances and measurement method. Check the condition of the bore and the edges as well. A key that seems to fit by hand does not, on its own, establish that every dimension and positional requirement is satisfied.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If the first part fails inspection, retain the measurement information and examine the setup before making another part. Check the drawing interpretation, tool identification, bushing fit, shim sequence and seating surfaces. Follow the shop&#39;s process for nonconforming material; do not assume that an out-of-tolerance slot can be corrected by an extra pass.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"single-pass-and-multi-pass-keyway-broaching\"><span class=\"ez-toc-section\" id=\"Single-Pass_and_Multi-Pass_Keyway_Broaching\"><\/span>Single-Pass and Multi-Pass Keyway Broaching<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A <strong>multi-pass<\/strong> push set uses the same guided broach on successive strokes, with the prescribed shim arrangement moving the tool to reach the specified depth. It can be useful for a shop making different sizes with a set of tools, provided the job remains within the set&#39;s limits. More passes also mean that cleaning, reseating and alignment must be repeated consistently.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A <strong>single-pass<\/strong> keyway broach is designed to produce the feature in one traversal when used under its specified conditions. Chisen&#39;s instructions describe a guided one-pass tool separately from its shimmed sets. Its production-keyway instructions also describe a tool guided by a pilot rather than a separate bushing. Neither arrangement should be assumed interchangeable with a shimmed set.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">When comparing proposals, ask the supplier for the supported bore range, keyway dimensions and tolerance, workpiece length, material, guidance, force and maintenance requirements. Include the time to load, inspect and handle the part in the process comparison. A shorter cutting sequence does not eliminate the need for a suitable fixture and inspection plan.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"troubleshoot-the-setup\"><span class=\"ez-toc-section\" id=\"Troubleshoot_the_Setup\"><\/span>Troubleshoot the Setup<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A visible defect is a reason to investigate the complete process, not proof of a single cause. Record the symptom and the conditions under which it appeared. Stop if the tool or setup is unsafe, and consult the tooling and equipment suppliers when the cause is unclear.<\/p>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table><thead><tr><th>Observation<\/th><th>Checks to discuss with the responsible technician<\/th><\/tr><\/thead><tbody><tr><td>Broach drifts or the assembly moves<\/td><td>Check support, ram alignment, guide fit, seating faces and the selected fixture.<\/td><\/tr><tr><td>Slot does not meet width or depth<\/td><td>Verify the drawing and measurement method, broach and bushing identification, shim sequence and tool condition.<\/td><\/tr><tr><td>Surface is marked or torn<\/td><td>Inspect tool condition, chips, lubricant and setup; ask the supplier before changing tool geometry or cutting conditions.<\/td><\/tr><tr><td>Unexpected force or tool damage<\/td><td>Stop and check compatibility, workpiece material, cut length, chip removal and capacity with the relevant supplier.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Do not grind a broach to a generic clearance or change a shim stack based solely on a troubleshooting table. A correction must suit the actual tool and should be made under the toolmaker&#39;s guidance. For broader diagnosis, see <a href=\"https:\/\/broachingmach.com\/pt\/troubleshooting-for-broaching-operation\/\">troubleshooting for broaching operation<\/a>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"when-to-consider-another-method\"><span class=\"ez-toc-section\" id=\"When_to_Consider_Another_Method\"><\/span>When to Consider Another Method<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A guided push broach needs a suitable path through the workpiece and adequate room for the tool to travel and exit. A blind bore or a slot that ends inside a part calls for a different assessment. Tool supplier CNC Broach Tools describes a relief requirement for its particular internal blind-keyway tools; this is not a blanket instruction for every blind-hole process.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Alternatives may include keyseating, an appropriately configured machine-tool operation or wire EDM, depending on geometry, material, tolerance, quantity and access. Ask each supplier to evaluate the same drawing and inspection requirements. Compare tooling, setup, cycle, inspection and lead time as a complete job rather than choosing on a single claimed speed. Our <a href=\"https:\/\/broachingmach.com\/pt\/blind-keyway-broaching\/\">blind keyway broaching guide<\/a> explains the access issue further.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"keyway-broaching-faq\"><span class=\"ez-toc-section\" id=\"Keyway_Broaching_FAQ\"><\/span>Keyway Broaching FAQ<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"can-a-keyway-be-broached-with-a-press\"><span class=\"ez-toc-section\" id=\"Can_a_keyway_be_broached_with_a_press\"><\/span>Can a keyway be broached with a press?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A suitable arbor or hydraulic press can be used with a compatible guided push-broach set. Check force, travel, support and clearance for the actual tool and part. IBT Thiermann describes this arrangement for its push-type tools; the press and tooling instructions remain the authority for the specific setup.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"does-every-keyway-broach-need-a-shim\"><span class=\"ez-toc-section\" id=\"Does_every_keyway_broach_need_a_shim\"><\/span>Does every keyway broach need a shim?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">No. Shimmed multi-pass sets and one-pass tools are different designs. Follow the instructions for the particular broach and bushing rather than adding or omitting a shim based on a general rule. The tool supplier should be able to identify the proper sequence and replacement parts.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"how-do-i-choose-the-keyway-depth\"><span class=\"ez-toc-section\" id=\"How_do_I_choose_the_keyway_depth\"><\/span>How do I choose the keyway depth?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Use the part drawing and its specified standard or design requirement. Confirm whether the dimension is radial depth or an inspection measurement, and choose the tooling and checking method accordingly. Do not infer acceptance from the key&#39;s fit alone.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"can-the-same-method-make-a-blind-keyway\"><span class=\"ez-toc-section\" id=\"Can_the_same_method_make_a_blind_keyway\"><\/span>Can the same method make a blind keyway?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Not automatically. A through-bore push setup requires tool travel and an exit path. A blind feature needs a process and tool designed for its available clearance and relief. Provide the complete drawing to the tooling supplier before selecting a method.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"plan-your-keyway-broaching-job\"><span class=\"ez-toc-section\" id=\"Plan_Your_Keyway_Broaching_Job\"><\/span>Plan Your Keyway Broaching Job<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A successful job starts with a complete drawing and a matched tool, guide and fixture. Confirm the pass sequence and press capacity, keep the setup clean and aligned, and use the specified inspection method before releasing parts. Avoid carrying an undocumented cutting speed or shim arrangement from one job to another.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For help reviewing a bore, keyway drawing or production requirement, <a href=\"https:\/\/broachingmach.com\/pt\/contact\/\">contact our team<\/a> with the material, dimensions, tolerances and expected volume.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"references\"><span class=\"ez-toc-section\" id=\"References\"><\/span>References<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<ul class=\"wp-block-list\"><li><em><a href=\"https:\/\/www.arceurotrade.co.uk\/projects\/broaching\/Keyway-Broach-Set-Instructions-1.1.pdf\" target=\"_blank\" rel=\"noopener\">Product Guidance Sheet: Keyway Broaching Sets<\/a> &mdash; Arc Euro Trade describes the set&#39;s guided setup, support and shimmed passes.<\/em><\/li><li><em><a href=\"https:\/\/www.chisentools.com\/resources\/broaching\/broaching.pdf\" target=\"_blank\" rel=\"noopener\">Broaching Procedures<\/a> &mdash; Chisen distinguishes shimmed sets, one-pass tools and production broaches.<\/em><\/li><li><em><a href=\"https:\/\/www.ibt-gmbh.de\/en\/hs_anleitung.html\" target=\"_blank\" rel=\"noopener\">Tips for HASSAY SAVAGE Keyway Broaches<\/a> &mdash; IBT Thiermann describes matching a bushing and broach and aligning the ram.<\/em><\/li><li><em><a href=\"https:\/\/cncbroachtools.com\/keyway-broach-tools\/\" target=\"_blank\" rel=\"noopener\">Keyway Broach Tools<\/a> &mdash; CNC Broach Tools identifies a relief requirement for its blind-keyway tooling.<\/em><\/li><\/ul>","protected":false},"excerpt":{"rendered":"<p>Knowing how to broach a keyway starts with matching the tool to the drawing and the bore. A guided push [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":9381,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[23,31],"tags":[],"class_list":["post-4789","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-broaching","category-keyway-broaching"],"_links":{"self":[{"href":"https:\/\/broachingmach.com\/pt\/wp-json\/wp\/v2\/posts\/4789","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/broachingmach.com\/pt\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/broachingmach.com\/pt\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/broachingmach.com\/pt\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/broachingmach.com\/pt\/wp-json\/wp\/v2\/comments?post=4789"}],"version-history":[{"count":21,"href":"https:\/\/broachingmach.com\/pt\/wp-json\/wp\/v2\/posts\/4789\/revisions"}],"predecessor-version":[{"id":9446,"href":"https:\/\/broachingmach.com\/pt\/wp-json\/wp\/v2\/posts\/4789\/revisions\/9446"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/broachingmach.com\/pt\/wp-json\/wp\/v2\/media\/9381"}],"wp:attachment":[{"href":"https:\/\/broachingmach.com\/pt\/wp-json\/wp\/v2\/media?parent=4789"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/broachingmach.com\/pt\/wp-json\/wp\/v2\/categories?post=4789"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/broachingmach.com\/pt\/wp-json\/wp\/v2\/tags?post=4789"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}