Badger Sintered Tools
They're tough and they dig


Tool Selection

Bit Size (mm) Application Grit Size
 1.0  All stone 220 
1.2 All stone 220
1.4 All stone 220
1.75 All stone 220
2.0 >5 hardness 220
2.0 <5 hardness 125

  • Select the right bit: the tougher the stone the finer (larger grit number) the diamond grit needed.
  • Select the right drill;
    • A jeweler's drill press performs best.  We've had the most success with the Covington Manual Gem Drill 
    • Badger Sintered Tools diamond bits perfom best at ~2500 rpm

 Drilling Instructions

1. Keep bits cool and wet during the drilling process. A water bath that keeps the rock submerged during drilling works best. A submersible vise that securely holds the specimen to be drilled works well.

2. Make a beginning hole by drilling SLOWLY and GENTLY  allowing the bit to seat.

3. Choke up the tip of the bit very close to the chuck when, starting out, so the shaft is held rigid. This is especially important with 1 mm & 1.4 mm bits.

Once the hole is started raise the bit to clear the stone. Bring it back down slowly making sure the bit drops STRAIGHT into the existing hole.

5. Apply only enough downward pressure to see a scant cloud of dust float out of the hole. Drill for a few seconds, raise the bit up and back down for a few more seconds. Repeat the process through the stone.

6. Check constantly that the bit is absolutely centered on the hole to avoid stress to the shaft material.

7. Be patient, as just a few seconds of excess pressure will cause unwanted diamond loss from the bit.

8. Avoid blowing a crater on the breakout side by going very slowly as you finish.





































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