Chicago-latrobe 70322 Drill Bit Letter V 0.377 in Hss Tin

Product Description

The CHICAGO-LATROBE 70322 is a jobber-length twist drill bit in the Series 150T, sized at Letter V (0.3770 inches) and coated with Titanium Nitride (TiN) over a High Speed Steel body. The TiN coating extends surface hardness and reduces friction during cutting, which translates to longer tool life in production drilling environments. The 118-degree standard point angle suits a broad range of common metalworking applications. A web-thinned, tapered web design reduces thrust force at entry, making the bit easier to start and keeping it on-center without a pilot hole in most setups. This bit is suited for use by machinists, maintenance technicians, and metalworking tradespeople working with ferrous and non-ferrous stock.

The 70322 is intended for general-purpose drilling in cast iron and steel. The straight-cylindrical shank seats in standard three-jaw drill chucks on benchtop drill presses, hand drills, and CNC drill spindles sized for 0.3770-inch shanks. With a 5-inch overall length and a 3.625-inch flute length, this bit fits standard jobber-length tooling setups and chuck clearances. Right-hand cut with a regular spiral flute, it clears chips efficiently in through-hole and blind-hole drilling at moderate feed and speed rates appropriate for HSS tooling.

Key Features

• Letter V size — 0.3770 inches diameter with a tolerance of -0.0010 to 0.0000 inches
• Titanium Nitride (TiN) coating over High Speed Steel for extended wear resistance
• 118-degree standard point angle with web-thinned, tapered web for reduced entry thrust
• Right-hand cut, regular spiral flute — 2 flutes for efficient chip evacuation
• Straight-cylindrical shank at 0.3770 inches — compatible with standard drill chucks
• Conforms to DIN 338 dimensional standard for jobber-length drill bits

Compatibility

Designed for general-purpose drilling in cast iron and steel. The straight-cylindrical shank fits standard three-jaw chucks accepting 0.3770-inch shanks. Conforms to DIN 338 for interchangeability with jobber-length tooling in that size range.

Installation Notes

Install the shank fully into a properly sized drill chuck and tighten securely before operation. Secure the workpiece with a vise or clamp — never hold freehand when drilling metal stock of this diameter. Apply cutting fluid or coolant as appropriate for the workpiece material to maintain edge life, noting this bit does not support coolant-through delivery. Match spindle speed and feed rate to the 0.3770-inch diameter and workpiece material per standard HSS drilling feeds-and-speeds tables.