Hassay Savage Tech Support

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  • Our Resource Center provides helpful information regarding various types of broaching.
  • Need to resharpen your existing broaches? No problem! Click here for more information on our reconditioning method.
  • Looking for a custom broach solution? Contact Hassay and tell us what you are looking for!
  • Check out our video page for product demos.

Troubleshooting Broaches

Poor Finish: Material too soft; alignment of broach incorrect; coolant incorrect or improperly applied; dull or poorly sharpened broach.

Chatter Marks: Broach too sharp; coolant incor- rect or improperly supplied; lower broach speed required; dull or poorly sharpened broach; tooth space incorrect.

Broach Drifting: Support and alignment of broach incorrect; material too soft; dull or poorly sharpened broach.

Excessive Edge Wear: Abrasive material; coolant incorrect or improperly applied; broaching speed incorrect; incorrect type of HSS.

Chipping: Too little or wrong type of lubricant; tooth spacing may be incorrect for the work- piece’s material composition; tool speed too rapid for effective chip removal; chip load too high.

Lubricant Guide

Steel: A good grade of cutting oil or water soluble coolant. Cutting oil sprayed on the broach teeth reduces friction on mild steel. Hard steels, especially those containing nickel, may require a chloine additive to a sulfur based cutting oil.

Brass: Broach brass dry or with water soluble lubricant.

Copper and Bronze: Oil or water soluble oil is recommended.

Cast Iron: Broach without lubricants. Use oil to lubricate between broach and shim or bushing.

Aluminum: Special lubricants required, depending on the nature of the aluminum. Harder varieties may be treated as soft steel. In general, the alloy manufacturer’s recommendations for low-speed machining operations should be followed.