Chicago-Latrobe 78595 140° Solid Carbide Straight Flute Drill 11/64 in

Precision drill bit for carbide machining

The Chicago-Latrobe 78595 is a solid carbide straight flute drill sized at 11/64 inch with a 140-degree point angle. Its 4 facet point geometry provides accurate hole starts in hard materials. The bright uncoated finish suits general-purpose machining where coating is not required. This fractional inch bit targets machinists drilling abrasive or high-temperature alloys.

Straight flute limits chip evacuation in deep holes

The straight flute design cannot lift chips effectively beyond shallow depths, so holes deeper than the 1 1/16 inch flute length risk packing and tool failure. Carbide's brittleness demands rigid setups; any runout or vibration will cause chipping. Uncoated carbide wears faster in stainless steel or titanium than coated alternatives. Coolant pressure must reach the cutting zone to prevent built-up edge.

11/64 inch diameter fixes the hole size

The 0.171875 inch decimal equivalent means this bit produces one specific hole diameter only. Shops needing a different size must select another tool. The 140-degree point angle is optimised for harder materials; softer metals may benefit from a steeper angle. Verify your machine's collet or chuck accepts this shank before ordering.