Chicago-Latrobe
Chicago-Latrobe 53131 31/64 in 118 Degree Taper Shank Drill Bit
A 31/64 inch high-speed steel taper shank drill bit with a 118 degree conventional point and black oxide finish
- 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.
Highlights
- 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
Specifications
| Brand | CHICAGO-LATROBE |
|---|---|
| Type | Drill 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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