Walter Surface Technologies
Walter Surface Technologies 01M547 Prentice Drill 47/64" 135deg
Heavy-duty cobalt drill bit with 47/64" diameter, 135-degree point and three-flat shank for portable drills and presses
- TypeElectric Drills
- Heavy-duty drilling in portable drills, drill presses and magnetic base drills with ½” chuck capacity
- Extra-hard cobalt-blend tips extend life between re-sharpenings
- 135-degree point geometry eliminates the need for pre-drilling
- Three flats on the shank prevent slippage inside the chuck
- Drills mild steel, non-ferrous metal and stainless steel
Walter 47/64" Prentice Drill Bit
This Walter Surface Technologies 01M547 Prentice drill bit is a heavy-duty large diameter cutting tool built for portable drills, drill presses and magnetic base drills with a half-inch chuck. Its cobalt blend construction and extra hard tips extend working life between re-sharpenings. The 135 degree point geometry eliminates the need for pre-drilling in many applications.
Upgrade from standard twist bits
The three flats on the shank prevent slippage inside the chuck, a common issue with round-shank bits in high-torque situations. Special bronze SST treatment reduces friction so the bit drills more holes faster. The jump is worth it when drilling mild steel, non-ferrous metal or stainless steel where standard bits wear quickly or walk on the surface.
Capacity and headroom
The 47/64 inch diameter with a 3-1/8 inch flute length and 6 inch overall length handles deep holes in thick plate. Cobalt blend tips maintain hardness at elevated temperatures for extended production runs. The bit runs out when the workpiece exceeds the flute length or when the machine lacks the torque to drive this diameter through harder alloys.
Highlights
- Heavy-duty drilling in portable drills, drill presses and magnetic base drills with ½” chuck capacity
- Extra-hard cobalt-blend tips extend life between re-sharpenings
- 135-degree point geometry eliminates the need for pre-drilling
- Three flats on the shank prevent slippage inside the chuck
- Drills mild steel, non-ferrous metal and stainless steel
Specifications
| Brand | WALTER SURFACE TECHNOLOGIES |
|---|---|
| Type | Electric Drills |
Questions about this item
What chuck size is required for the 47/64" Prentice drill bit?
The bit has a 1/2" shank, so it fits portable drills, drill presses and magnetic-base drills with a 1/2" chuck capacity.
Which step do users often miss when starting a hole with the 135-degree point?
The exclusive point geometry eliminates the need for a pilot hole, so the common mistake is pre-drilling when it isn't required.
How can the cobalt-blend tip be restored when it dulls?
The extra-hard tip can be re-sharpened, allowing many more holes before replacement is necessary.
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