Westward
Westward 5XL81 5/16" HSS Black Oxide 135° Jobber Drill Bit
A 5/16 inch HSS black oxide jobber drill bit with a 135 degree split point for general drilling
- TypeAngle, Pitch & Slope Locators
- 5/16 in fractional size for precise hole diameter
- 135 degree split point reduces walking on hard materials
- High-speed steel construction resists heat during extended drilling
- Black oxide finish adds corrosion protection and chip flow
- Jobber length suits standard drilling depth requirements
Westward 5/16" HSS Jobber Bit
This Westward drill bit is a 5/16 inch high-speed steel jobber length tool designed for general-purpose drilling in metal, wood and plastic. It suits tradespeople and DIY users who need a reliable fractional-size bit for everyday workshop tasks.
135° Split Point with Black Oxide
The 135 degree split point reduces walking and starts holes cleanly without a centre punch. Black oxide finish adds corrosion resistance and helps retain lubricant during cutting. High-speed steel construction handles typical ferrous and non-ferrous materials but will wear faster in hardened steel or high-volume production runs.
Decimal Size 0.3125 Inch
The bit’s exact decimal equivalent is 0.3125 inch, which determines whether it matches the hole specification on your drawing or tap chart. Verify this diameter against your required clearance or thread size before purchasing.
Highlights
- 5/16 in fractional size for precise hole diameter
- 135 degree split point reduces walking on hard materials
- High-speed steel construction resists heat during extended drilling
- Black oxide finish adds corrosion protection and chip flow
- Jobber length suits standard drilling depth requirements
Specifications
| Brand | Westward |
|---|---|
| Type | Angle, Pitch & Slope Locators |
Questions about this item
Will the 5/16 inch size and 135 degree split point work with my older 3/8 inch drill chuck?
The 5/16 inch shank fits any chuck that accepts up to 3/8 inch, and the 135 degree split point reduces walking on hard materials without needing a centre punch.
How can I confirm the bit is cutting correctly once I start drilling?
A properly sharpened 135 degree split point produces short, curled chips and drills straight without excessive pressure or wandering.
Does the box contain only the single 5/16 inch bit or a set, and is a case included?
The item is sold as an individual jobber length drill bit; no case or additional bits are included in the packaging.
Also in this aisle
People compared these
Same shelf, same checkout — eight coins and a 30-minute rate lock.
