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Use the matrix as a screening tool. Final selection requires the actual drawing, material, machine, fixture and inspection plan.<\/em><\/p>\n\n\n\n\nDecision factor<\/th>\n Progressive broaching tends to fit when<\/th>\n Keyseating tends to fit when<\/th>\n Validation question<\/th>\n<\/tr>\n<\/thead>\n \n\nTool path<\/td>\n The keyway has a clear through path<\/td>\n A controlled stop and return are needed<\/td>\n Where do the tool and chips go at both ends?<\/td>\n<\/tr>\n \nFeature family<\/td>\n Geometry is stable enough to support dedicated tooling<\/td>\n Width, depth or length changes are frequent<\/td>\n How many variants and changeovers are real?<\/td>\n<\/tr>\n \nProduction route<\/td>\n A purpose-designed pass integrates well with loading and inspection<\/td>\n Incremental generation fits available capacity or flexible routing<\/td>\n What is the total cycle, not only cutting time?<\/td>\n<\/tr>\n \nPart envelope<\/td>\n The part and complete broach stack fit stroke and daylight<\/td>\n The part can be supported around a reciprocating cutter path<\/td>\n What interferes with entry, support or exit?<\/td>\n<\/tr>\n \nTooling strategy<\/td>\n Tool lead time, storage and reconditioning are acceptable<\/td>\n A cutter-based system reduces variant-specific commitment<\/td>\n How will wear, spares and replacement be managed?<\/td>\n<\/tr>\n \nWorkholding<\/td>\n The fixture can resist the progressive cutting load and guide the tool<\/td>\n The fixture can resist repeated strokes and preserve alignment<\/td>\n Which datum controls keyway position?<\/td>\n<\/tr>\n \nChips<\/td>\n Tooth space and an open path can carry chips out<\/td>\n Repeated strokes have a deliberate evacuation route<\/td>\n Can chips leave without recutting or packing?<\/td>\n<\/tr>\n \nInspection<\/td>\n Stable dedicated tooling supports the required control plan<\/td>\n Adjustable generation and setup can be measured and corrected<\/td>\n Which measurement detects drift soonest?<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/figure>\nIf the evidence is split, do not force a paper decision. A representative cutting trial can compare actual load, chip behavior, setup time, measurements and tool condition.<\/p>\n
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