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Silver metal 12 inch drill bit with split point tip

Cleveland Golf

Cleveland Golf C13178 Extension Drill 3/32x12 In HSS

SKU CH-XYX9-WJ27R MPN C13178

Extra-long 12-inch high-speed steel drill bit with 3/32-inch diameter and 135-degree split point for precise aircraft drilling

  • Product typeDrill Accessories
  • Main materialHigh speed steel
  • Extra reach with 12 inch overall length
  • Precise starts from 135 degree split point
  • Hard-wearing high speed steel construction
  • Optimised chip clearance at 21 to 34 degree helix
  • Aircraft-grade extension drill for deep holes

Aircraft Extension Drill 3/32x12 In HSS

This aircraft extension drill bit measures 12 inches in overall length and features a 3/32 inch fractional diameter. Constructed from high speed steel with a bright uncoated finish it is designed for deep hole drilling in aviation maintenance and general metalworking tasks. The 135 degree split point reduces walking and improves starting accuracy on hard materials.

Machinists needing extended reach in confined spaces

The 12 inch length suits machinists and maintenance technicians who must drill through bulkheads or deep cavities where standard bits cannot reach. The 3/32 inch diameter matches specific fastener pilot holes common in airframe assembly. Users requiring larger diameters or coated bits for high volume production should look at something else.

Check shank compatibility

Verify that your drill chuck or collet accepts a straight 3/32 inch shank and that the machine spindle provides enough travel for the full 12 inch bit. Confirm the 135 degree point angle suits the material hardness you are drilling. Ensure the work area allows the full bit length to rotate without obstruction.

How it compares

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

Price $10.99
Cheaper than about 86% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameCleveland
Model nameC13178
Product typeDrill Accessories
Size & build
Main materialHigh speed steel

Questions about this item

What size drill chuck does the 3/32 in shank on the C13178 require?

The 3/32 in shank fits any standard drill chuck that accepts bits up to that diameter, including common 3/8 in and 1/2 in capacity chucks.

Will the 12 in overall length reach through the workpiece when I keep my shorter jobber bits?

Yes, the 12 in extension adds significant reach beyond standard jobber lengths, letting you drill deeper without changing your existing shorter bits.

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