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12 inch black oxide aircraft extension drill bit with split point

Westward

Westward 5TVK9 Aircraft Extension Drill 1/4 in 12 in HSS Black Oxide 135° Split Point

SKU CH-YT8Q-ZQME4 MPN 5TVK9

A 12-inch high-speed steel aircraft extension drill with a 135-degree split point and black oxide finish for deep-hole drilling

  • Product typeDrill Accessories
  • Main materialHigh speed steel
  • 12 in overall length reaches deep cavities
  • 135° split point starts cleanly without wandering
  • High-speed steel body resists heat during extended drilling
  • Black oxide finish reduces chip welding on steel
  • 1/4 in fractional size fits standard drill chucks

1/4 Inch Aircraft Extension Drill

The Westward 5TVK9 is a 12 inch high speed steel drill bit with a black oxide finish. It features a 135 degree split point for accurate starting. This accessory suits maintenance tasks requiring extended reach in metalwork.

Installing the straight shank bit

Insert the bit into a compatible drill chuck and tighten securely before use. The split point geometry reduces walking on hard surfaces. Ensure the workpiece is clamped firmly to prevent movement during deep drilling.

Check chuck capacity and material needs

Verify your drill chuck accepts a 1/4 inch shank before ordering. The 2 3/4 inch flute length limits maximum hole depth in a single pass. California Proposition 65 warnings apply for cancer and reproductive harm.

How it compares

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

Price $9.99
Cheaper than about 88% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameWestward
Model name5TVK9
Product typeDrill Accessories
Size & build
Main materialHigh speed steel

Questions about this item

How can I confirm the 135° split point is cutting correctly after I start drilling?

The 135° split point should self-centre without a pilot hole and produce short, curled chips in steel; if the bit walks or generates excessive heat, resharpen or replace it.

What comes in the package and what must I supply myself?

The box contains the 12-inch high-speed-steel aircraft extension drill with black-oxide finish; you provide the drill motor, chuck or collet, cutting fluid and workpiece clamping.

Which version suits a 1/4-inch fractional hole at 4xD depth?

This 5TVK9 model is a 1/4-inch fractional bit with a 2 3/4-inch flute length, matching the 4xD requirement for deep-hole drilling in a single pass.

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