Always keep broaches sharp. Dull or poorly sharpened broaches will cause drifting, breakage, and damage to the teeth. Correct sharpening ensures satisfactory production in terms of time-efficiency, conformance to specifications, and finish. While adequate sharpness is determined by the material being broached, and the tolerances and finish involved, the following conditions typically indicate the need for resharpening.

When to Resharpen

1. Poor finish, tears, lands, galling, etc. on the part. 2. Cutting edges showing signs of turning, broach teeth dull to the touch. 3. Broached surfaces too hot at the end of stroke. 4. Broaching pressure increasing excessively, as indicated by gage. 5. Nicks, gouges, etc. in the teeth from improper handling. 6. Broach sticking in workpiece. 7. Holes gaging undersize.

duMONT Broach Sharpening Services
duMONT is fully equipped to provide expert resharpening on a cost-after-production basis. Broach sharpening is a precise operation; under or oversharpening will produce unsatisfactory results. If you intend to sharpen your broaches on your own, we suggest you send for our free fact sheet, entitled "Broach Sharpening".

If you have specific questions or problems not covered on these pages, contact your local "Minute Man"® distributor: Maryland Metrics.