Product Details
Dull drilling bits, result in slower drilling rates and more down time in your drilling operation.
Regrind your dull bits early… better efficiency always pays off.
Why use a Bit Grinder? Your drilling efficiency, with the reground bit, will increase and reduce damage to your drilling equipment. Dull drilling bits will cause excessive loading and early breakdown of, hammers, striking bars, couplings, and bits.
Button Bit Regrinding Program Recommendations
1/2” diameter and smaller buttons:
Bits with a wear band or flat of 3/32″ to 1/8” – 2 to 3mm on the gauge buttons, is the best time to regrind the bit.
9/16” diameter and larger buttons:
Bits with a wear band or flat of 1/8” to 3/16” – 3 to 4mm on the gauge button is the best time to regrind the bit.
Operation of the Grinder
The HG-105 hand grinder operates at 22,000 RPM and is designed so the user can regrind button bits with minimum inconvenience and maximum efficiency.
Grinding is accomplished by using the Carbide Button Grinding Tool or the Combination Button Grinding Tool, with cooling slot, to help keep the coolant on the carbide button being reground, thus preventing metallurgical damage to the carbide button material by overheating when grinding.
We recommend that the carbide button should be reground when the button has a wear band or flat area of 1/8” or 3mm on smaller buttons, and 3/16” or 4-5mm on larger buttons. This will reduce the amount of carbide removed, reduce the regrinding time and will extend button life.
Insert a Button Grinding Tool into the collet until tool bottoms out against the collet seal, then tighten the collet cap with provided wrenches. Place the hand grinder and tool on a button to be ground and with sufficient down pressure to keep grinding tool on the button, depress the throttle bar and begin to grind the button. Be sure to use adequate coolant flow, to keep the button cool. Operated the grinder in small circular motion until the flat, or most of it has been removed. Repeat on all buttons.
| Part No. | Inch Size Dia. | Metric Size Dia. |
|---|---|---|
| CBT-100-250 | 1/4" | 6.4mm |
| CBT-100-275 | 7.0mm | |
| CBT-100-312 | 5/16" | 8.0mm |
| CBT-100-354 | 9.0mm | |
| CBT-100-375 | 3/8" | 10mm |
| CBT-100-437 | 7/16" | 11mm |
| CBT-100-472 | 12mm | |
| CBT-100-500 | 1/2" | 13mm |
| CBT-100-562 | 9/16" | 14mm |
| CBT-100-590 | 15mm | |
| CBT-100-625 | 5/8" | 16mm |
| CBT-100-708 | 18mm | |
| CBT-100-750 | 3/4" | 19mm |
| CBT-100-787 | 20mm | |
| CBT-100-875 | 7/8" | 22mm |
