Walter Surface Technologies
Walter Surface Technologies 01M557 Prentice Drill Bit 57/64" 135deg
Heavy-duty cobalt drill bit drills 57/64" holes in steel with a 135-degree point and three-flat shank
- TypeElectric Drills
- Drills more holes faster with exclusive point geometry
- Extra hard cobalt tips extend time between re-sharpenings
- Three flats on shank prevent slippage in chuck
- Suitable for mild steel, stainless steel and non-ferrous metal
- 57/64 inch diameter with 135 degree point angle
Heavy-duty 57/64" cobalt drill bit
The Walter Surface Technologies 01M557 Prentice bit is a heavy-duty large-diameter drill bit designed for portable drills, drill presses and magnetic base drills with a ½” chuck. Its cobalt blend construction and extra-hard tips deliver extended life and more holes between re-sharpenings. The 135-degree point geometry eliminates the need for pre-drilling, while three flats on the shank prevent slippage inside the chuck.
Suited for steel and stainless drilling
This bit suits professionals drilling mild steel, non-ferrous metals and stainless steel who want faster drilling and fewer bit changes. The SST treatment and exclusive point geometry support high-volume work without pilot holes. Buyers who need smaller diameters, longer flute lengths or bits for wood and masonry should look at other options.
57/64" diameter with 135-degree point
The decisive specification is the 57/64-inch drill diameter combined with a 135-degree point angle, which determines the hole size you can produce and the self-centring behaviour in hard metals. Match this diameter and point angle to your application and chuck capacity before purchasing.
Highlights
- Drills more holes faster with exclusive point geometry
- Extra hard cobalt tips extend time between re-sharpenings
- Three flats on shank prevent slippage in chuck
- Suitable for mild steel, stainless steel and non-ferrous metal
- 57/64 inch diameter with 135 degree point angle
Specifications
| Brand | WALTER SURFACE TECHNOLOGIES |
|---|---|
| Type | Electric Drills |
Questions about this item
Does the 135-degree point angle limit the materials this bit can drill?
The 135-degree point is designed for hard materials such as stainless steel and mild steel, reducing the need for a pilot hole in those metals.
Will the shank fit a standard half-inch drill chuck?
Yes, the bit has a half-inch shank with three flats that lock into a half-inch chuck and prevent slipping during heavy drilling.
What is the correct way to secure the bit so it does not spin in the chuck?
Align the three flats on the shank with the chuck jaws and tighten firmly; skipping this step lets the bit slip under load.
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