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Silver tapered high-speed steel drill bit 31/64 inch 118 degree point black oxide finish

Chicago-Latrobe

Chicago-Latrobe 53131 31/64 in 118 Degree Taper Shank Drill Bit

SKU CH-2BPG-R1JPN

A 31/64 inch high-speed steel taper shank drill bit with a 118 degree conventional point and black oxide finish

  • Product typeDrill Bits
  • 31/64 in diameter drills precise holes in metal and wood
  • 118-degree conventional point centres quickly without wandering
  • High-speed steel body resists wear during repetitive drilling
  • Black oxide finish reduces friction and extends cutting life
  • Taper shank locks securely into machine spindles for stable power transfer

Chicago-Latrobe 53131 Taper Shank Drill Bit

The Chicago-Latrobe 53131 is a general-purpose taper shank drill bit sized at 31/64 in with a 118-degree conventional point angle. It is manufactured from high-speed steel with a black oxide finish for durability. This accessory suits machinists and maintenance technicians who need a reliable drill for standard ferrous and non-ferrous materials.

Taper Shank Installation and Common Issues

The taper shank seats directly into a matching machine spindle or sleeve, so installation is a matter of clean mating surfaces and firm seating. Problems usually arise when the shank or socket is contaminated with chips or oil, causing run-out or slippage under load. A damaged taper angle will also prevent accurate location and must be corrected before use.

Capacity and Headroom for 31/64 in Drilling

The 31/64 in diameter handles typical through-hole and blind-hole work in mild steel, cast iron and aluminium alloys within the capability of a standard drill press or radial arm. The 118-degree point provides adequate centring for general-purpose drilling but is not optimised for deep-hole or high-feed applications where specialised geometry would be required. High-speed steel construction limits sustained performance in hardened steels or high-temperature alloys where carbide tooling becomes necessary.

How it compares

Measured against everything we stock in Bits, Hole Saws & Accessory Kits, at today’s prices. Recalculated every night.

Price $23.99
Cheaper than about 57% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameCHICAGO-LATROBE
Product typeDrill Bits

Questions about this item

How can I verify the 118-degree point angle is cutting correctly after I start drilling?

The 118-degree conventional point should centre itself without a pilot hole and produce clean, evenly spaced chips in steel when the drill runs at the proper speed for 31/64 in high-speed steel.

What comes with the Chicago-Latrobe 53131 and what must I supply?

The box contains the single 31/64 in taper shank drill bit with black oxide finish; you must provide a taper-shank holder or machine spindle that accepts the taper, plus cutting fluid for steel.

When should I choose the 31/64 in size over other diameters?

Select the 31/64 in bit when the hole diameter must match that exact fractional size for tap clearance, reamer pilots or bolt patterns specified in your drawing.

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