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Silver and black oxide drill bit, 13/16 inch, reduced shank

Westward

Westward 4UM78 Silver/Deming Drill 13/16 in HSS 118 Deg

SKU CH-5A84-B65T8 MPN 4UM78

A 13/16 inch high-speed steel drill bit with a 118-degree point angle and black oxide finish

  • Product typeDrill Accessories
  • Main materialHigh speed steel
  • 13/16 in diameter drills large holes efficiently
  • High-speed steel construction resists wear during heavy use
  • 118-degree point angle centres quickly on contact
  • Black oxide finish reduces friction and heat build-up
  • Reduced shank fits standard 1/2 in chucks securely

Drill accessory for large holes

This Westward 4UM78 is a Silver and Deming drill bit with a 13/16 in cutting diameter. The bit is made from high speed steel and ground to a 118 degree point angle for general-purpose drilling. A black oxide finish helps resist wear during use. The reduced shank allows the bit to fit in standard drill chucks.

Suited for metalwork and woodwork

The bit suits machinists and maintenance technicians who need to drill 13/16 in holes in steel, cast iron or wood using a handheld drill or drill press. Buyers who need a different diameter or a split-point geometry for self-centring should look at something else. The 118 degree point is not optimised for hard or abrasive materials that demand a steeper angle.

13/16 in diameter with 118 degree point

The single specification that decides fit is the 13/16 in drill size combined with the 118 degree point angle. This determines the hole diameter produced and the cutting behaviour in the workpiece. Match both values to the job requirements before purchasing.

How it compares

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

Price $20.99
Cheaper than about 62% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameWestward
Model name4UM78
Product typeDrill Accessories
Size & build
Main materialHigh speed steel

Questions about this item

How do I confirm the 13/16 in drill bit is cutting correctly after chucking it?

A clean, round hole with consistent chips and no wandering indicates the 118 degree point is working as intended in the material.

What comes in the package and is a reduced-shank adapter needed separately?

The box contains the single high-speed steel drill bit with black oxide finish; no adapter is required because the shank is already reduced.

Which Westward 4UM78 variant should I choose for a 13/16 inch hole?

This model is the 13/16 in size with a 118 degree point angle in high speed steel, matching that exact hole requirement.

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