Introduction: Presetting Endmills to Retain Balance
This technique will produce repeatable tool stack-ups when replacing worn endmills. It will retain its original balance and offset along with its dynamic properties.
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Step 1: Balance and Tap-Test Assembly
Step 2: Measure Stickout
Record this dimension in the DC software when tap-testing the tool.
Step 3: Put Setting Ring on Endmill
They are made of aluminum and will not harm the cutting edges. The setting rings can be purchased HERE.
Step 4: You May Have to Adjust Clamping Pressure
Step 5: Align Slot With Tooth Edge
Rotate stop until the slot is aligned with the point of one tooth. Similar to sighting a rifle.
Step 6: Set the Stop Gage
The Stop Gage can be purchased HERE
Step 7: Make a Witness Mark
Use a Dremel engraver or die grinder to mark the location of the slot.
Step 8: Remove the Ring
Step 9: Set the Next Endmill
Using the Setting Gage and align the slot with a tooth point. You can preset multiple endmills at a time if you wish and have them ready for reloading.
NOTE: If you are setting variable pitch tools, you will need to make sure you are setting to same tooth and orientation to the Weldon flat.
Step 10: Replace Endmill
- Insert new endmill
- Rotate the stop until the slot aligns with the witness mark.
- Tighten toolholder
- Remove stop
This will work with shrink fit and other toolholder systems. For Rego-Fix PG, we recommend using their length setting gage and aligning one of the slots on the collet to the tooth tip and the witness mark.