Chicago-Latrobe 50854 Screw Machine Drill Size Y Cobalt 135 Deg

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.