Chicago-Latrobe
Chicago-Latrobe 50854 Screw Machine Drill Size Y Cobalt 135 Deg
Cobalt screw-machine drill bit in size Y with a 135-degree split point and .4040 decimal equivalent
- TypeDrill Bits
- Cobalt steel resists heat and wear during drilling
- 135-degree split point starts holes accurately without wandering
- Size Y drill bit with .4040 decimal equivalent fits precise applications
- Right-hand cutting direction suits standard drill chucks
- Screw machine length provides rigidity for portable drilling
Chicago-Latrobe 50854 Cobalt Drill Bit Y
This Chicago-Latrobe 50854 drill bit is a screw-machine accessory made from cobalt steel for hardness and heat resistance. It carries a Size Y designation with a decimal equivalent of .4040 and a 135-degree split point. The right-hand cutting direction suits standard drill motors and pneumatic drivers. A straw-coloured finish identifies the surface treatment applied at the factory.
Machinists drilling stainless steel
The cobalt construction and split-point geometry serve users who need a bit that resists work hardening and walks less on hard metals. Builders who only drill wood, plastic or soft aluminium will not benefit from the added cost of cobalt. Shops requiring coolant-through tooling or left-hand cutting must select a different design.
135-degree split point on cobalt steel
The 135-degree split point is the specification that determines whether this bit matches the application. It reduces thrust and improves centring on tough materials compared with shallower angles. If the job calls for a different point angle or a non-cobalt substrate, this part will not perform as required.
Highlights
- Cobalt steel resists heat and wear during drilling
- 135-degree split point starts holes accurately without wandering
- Size Y drill bit with .4040 decimal equivalent fits precise applications
- Right-hand cutting direction suits standard drill chucks
- Screw machine length provides rigidity for portable drilling
Specifications
| Brand | CHICAGO-LATROBE |
|---|---|
| Type | Drill Bits |
Questions about this item
What does the .4040 decimal equivalent mean for hole size?
The .4040 decimal equivalent indicates this drill bit produces a hole diameter of .4040 inches, matching the standard Size Y specification for precise screw machine work.
How does the 135 degree split point affect drilling performance?
The 135 degree split point reduces thrust required and prevents walking, allowing accurate hole starts on hard materials without a centre punch.
What shank style does this cobalt bit use for machine mounting?
This screw machine drill features a straight shank sized to the .4040 diameter, designed for direct collet or chuck mounting in screw machines and drill presses.
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