Broach Sharpening: Everything You Need to Know

  December 1, 2017

broach sharpening
 

Here we examine everything you need to know about broach sharpening. But first, let’s make sure you are broaching correctly to stop any issues causing an abnormal need for sharpening.

How to Correctly Broach with Keyway Sets

Let’s examine how you’re using your broach. Compare your process to these steps to assure a perfectly straight broached hole:

  1. Select correct size bushing for bore
  2. Insert bushing into bore of workpiece
  3. Insert broach into bushing slot (check for proper alignment)
  4. Place this assembly into press
  5. Ensure broach is centered under ram
  6. Lubricate work materials
  7. Apply pressure to broach
  8. Reduce ram pressure to provide better alignment
  9. Remove chips away from cutting section on broach
  10. Insert shim and repeat steps 4–9 as necessary to achieve exact keyway depth

If you’re following these steps, you are cutting correctly with your broach. Now let’s examine what you need to know about broach sharpening.

Signs You Need Broach Sharpening

Take a look at the quality of your workpiece. Are there signs of galling, tears, or a poor finish? How about the cutting edges of your broach? Touch the teeth to feel if they’re dull. Are there signs of rollover? Check to see if there are any gouges or nicks in the teeth that indicate improper handling. Does your broach ever stick to the workpiece? See if workpieces ever pick up on tops of broach teeth. Are the holes your broach is gauging below spec size? Are you applying more pressure or effort to complete the required cut?

Problems with Dull Broaches

If you continue to cut your workpieces with a dull broach it may result in damage to the teeth such as drifting and breakage. On the other hand, if you apply improper broach sharpening, it could ruin the original tooth form. In this case, the broach may become ineffective, cut parts that are the incorrect size, or cause unfixable damage.

Broach Sharpening Benefits

When broach sharpening is done correctly, you will achieve satisfactory cycle times and meet compliance in terms of product specifications. Sharpening will also increase broach life and accuracy, which will decrease your total production cost.

Ready to Sharpen Your Broaches?

In order to have your broaches properly sharpened, they will need to be examined. A full inspection that details the needed repairs and regrinding will make sure your broaches are fully able to be reconditioned. It’s the first step in finding an accurate quote for broach sharpening. Get your quote from Hansford Parts and Products. We have dedicated CNC machines that can regrind and sharpen your broaching tools. We also provide years of experience at removing the smallest amount of material to return your keyway broach to its original condition.

Need Keyway Broaches NOW?

Have a worn or broken keyway broach and need a replacement ASAP? Let us know and we’ll start building your broach so you can get right back to work. We can also inspect your existing tooling to arrange for an efficient maintenance or replacement plan. This partnership strategy prevents unplanned downtime and keeps you in line to maximize productivity and profitability.