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Silver high-speed steel aircraft extension drill bit, size 20, 12 inches long, bright uncoated finish, split point tip

Cleveland Golf

Cleveland Golf C13233 pneumatic accessory #20x12 In HSS

SKU CH-VANZ-7VGKJ MPN C13233

A 12-inch aircraft extension drill bit in high-speed steel with a #20 split point and 135-degree angle for deep drilling

  • TypeDrill Accessories
  • MaterialHigh speed steel
  • Extra reach with 12-inch overall length
  • Precise #20 wire-gauge diameter for tight holes
  • Clean starts from 135-degree split point
  • Durable high-speed steel construction
  • Optimised 21-to-34-degree helix for chip removal

Extension Drill Bit

The Cleveland Golf C13233 is a 12 inch extension drill bit made from high speed steel. It features a #20 wire gauge size and a 135 degree split point for accurate starts. The bright uncoated finish suits general purpose drilling applications.

Machining High Performance Grade

This accessory targets machinists needing extended reach in high performance materials. The 4xD length-to-diameter ratio supports deeper holes up to 5/8 inch depth. Buyers needing coated tools for abrasive alloys or shorter bits for rigid setups should look elsewhere.

135 Degree Split Point Geometry

The 135 degree split point reduces walking and lowers thrust requirements during entry. This geometry works with the 21 to 34 degree helix angle for efficient chip evacuation. Match the point angle to your material hardness and drilling conditions for best results.

Highlights

  • Extra reach with 12-inch overall length
  • Precise #20 wire-gauge diameter for tight holes
  • Clean starts from 135-degree split point
  • Durable high-speed steel construction
  • Optimised 21-to-34-degree helix for chip removal

Specifications

BrandCleveland
ModelC13233
TypeDrill Accessories
MaterialHigh speed steel

Questions about this item

What does the #20 wire-gauge size mean for the hole this bit drills?

The #20 wire-gauge size indicates the drill bit diameter, producing a hole suited to that standard gauge in materials where high-speed steel performs well.

What physical clearance does the 12-inch overall length require in the workpiece?

The 12-inch length allows a maximum drilling depth of 5/8 inch, so the workpiece must be accessible at that reach without obstruction.

How does the 135-degree split point change the starting step compared with a standard point?

The 135-degree split point is self-centering, so the bit starts on contact without a centre punch — skipping that step causes wandering.

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