Bit and Steel Grinding Equipment

The end result of over two years of study, engineering, and testing, the A-64 Rock Bit Grinder represents the ultimate in rock bit grinding. Proven in the field, its ease of operation and trouble-free service make the A-64 Grinder a giant on the job.

Designed as a completely self-contained unit, the A-64 Grinder eliminates all clumsy attachments. The complete grinding operation, including fluting gauging, is accomplished without removing the bit from the arbor.

Simplicity and ease of operation result in restoring the dullest bits to "like new" condition in just a few minutes. Training problems are eliminated, as a few minutes of instruction will enable an operator to become proficient at sharpening various sizes and types of bits.

Low maintenance is designed into the A-64 Grinder, simplifying the problem of upkeep and adding many hours to its long period of trouble-free operation. Grit and dust have no effect upon its ease of operation, and daily care consists of simply wiping grit from exposed surfaces of the Grinder.

Choice of power is another plus factor designed into the A-64 Grinder, greatly adding to its portability and adaptability to your particular requirements. Air or electric, whichever power is most readily available at the job site or in the shop, can be used to operate the Grinder. These power sources may be used interchangeably, and a 1" x 8" straight hand grinder in your shop or on the job site eliminates the need to purchase a separate power unit for your A-64 Rock Bit Grinder.

Designed with the user in mind, the A-64 Grinder provides the greatest reliability at the lowest grinding cost per bit.

Portability

The portability of the A-64 Grinder with its 7.5" bit capacity is unmatched.

Weight of the Grinder is less than 185 lbs.

Why A-64 Rock Bit Grinder is Made for Your Job:

1. Ease of Operation
   • Sharpens all bit wings with one setting of bit arm.
• Grinds bit to any angle, fluting, or gauging.
• No major adjustments to make from smallest to largest bit.
• No clumsy attachments for fluting or gauging, a self-contained grinder.
• Cam lock for quick indexing.
2. Choice of Power
   • Air, from compressor at jobsite or in the shop.
   • Electric, wherever available.
   • Straight Hand Grinder, 1" x 8", either air or electric, interchangeably.
3. Large Capacity
   • All sizes through 7.5" diameter, female threaded bits.
   • All sizes through 7.5" diameter, down the hole bits (with special adapter).
   • "X" or cross-type bits.
   • Full capacity, whether floor or bench mounted.
4. Portability
   • Can be mounted on back of pickup truck for bit grinding from trac-drill to trac-drill.
   • Can be mounted on compressor, at jobsite.
   • Bench or stand mounted, in the shop.
   • Weighs less than 185 lbs.
5. Low Maintenance
   • For daily care just wipe grit off grinder.
   • Spring loaded at vital points to compensate for wear and eliminate continual minor adjustments.
6. Lowest Cost
   • Lowest actual cost for a rock bit grinder with 7.5" capacity.
   • Can be used with our own 1" x 8" straight hand grinder, eliminating need for purchase of additional power grinder.
   • More bits per grinding wheel because it uses the complete wheel without need for major adjustments.

Electric Motor

Gauging Grinding

Down the Hole Bit Holder

1.5" thru 6.0" Internal Thread Bits
3.5" thru 7.5" Down the Hole Hammer Bits

2.250"

Selecting Correct Grinding Wheel Width

When grinding rock bits with less than 1.00" of carbide length to be ground per side, it is recommended that a 6" or 8" diameter wheel of 1/2" width be used for best results. This allows the wheel to self-dress itself as it is used with smaller bits.

When grinding rock bits with 1.00" or more of carbide to be ground per side, it is recommended that a 6" or 8" diameter wheel of 1.00" width be used. This allows the wheel to self-dress itself as it is used with larger bits.

Grinding Large and Small Rock Bits:

• Grinder Setup for Using 1.00" Width Wheel - By installing the wheel spacer #WS-1, per drawing WS-1 in service manual, you can use a 1/2" width wheel and there are no adjustments to be made to the grinder. This allows the grinder to operate as it does with the 1.00" width wheel setup on center of the roller block.
• The basic grinder is set up for the 1.00" width wheel.
• The WS-1 spacer is designed to locate the 1/2" width wheel on the same location as the 1.00" wheel setup.