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How many parts can I cut with a broach tool before resharpening?

The number of parts that can be cut by a broach tool before it needs resharpening depends on many factors. However, 2000 linear inches of cut in soft steel parts should be attainable with a broach tool made from PM-M4 high speed steel, prior to needing resharpening. Tool life estimates in other applications can be obtained from the tool manufacturer.