Cleveland Golf
Cleveland Golf C13192 5/16x12 In HSS pneumatic accessory
A 12-inch high-speed steel drill bit with a 135-degree split point for accurate starts and deep drilling
- TypeDrill Accessories
- MaterialHigh speed steel
- Extra-long 12-inch reach accesses deep holes
- 5/16-inch diameter suits precise fractional-inch drilling
- High-speed steel construction resists wear in tough materials
- 135-degree split point starts cleanly without wandering
- Machining-grade performance handles 21 to 34-degree helix angles
Extra-long drill bit for deep holes
This 12-inch aircraft extension drill reaches into cavities where standard bits cannot. The 5/16-inch diameter suits fractional-inch drilling tasks in maintenance and fabrication shops. High-speed steel construction keeps the edge intact during repetitive use. Buyers who need a shorter bit or a coated surface will not find those options here.
Split-point tip and bright finish
The 135-degree split point centres the bit without a centre punch and reduces walking on hard materials. An uncoated bright finish allows the operator to see wear and apply cutting fluid directly. The 21-to-34-degree helix range helps chip evacuation at the 4xD depth rating. Users who rely on coated bits for high-speed production should look elsewhere.
1-1/4 inch maximum drilling depth
The 4xD rating limits effective drilling depth to 1-1/4 inches despite the 12-inch overall length. This specification decides whether the bit can complete the hole in a single pass. Match the depth requirement to the workpiece before ordering. Builders who need deeper holes in one operation must choose a different tool.
Highlights
- Extra-long 12-inch reach accesses deep holes
- 5/16-inch diameter suits precise fractional-inch drilling
- High-speed steel construction resists wear in tough materials
- 135-degree split point starts cleanly without wandering
- Machining-grade performance handles 21 to 34-degree helix angles
Specifications
| Brand | Cleveland |
|---|---|
| Model | C13192 |
| Type | Drill Accessories |
| Material | High speed steel |
Questions about this item
Will the split-point tip on this 5/16 in HSS drill bit need regrinding after repeated use?
The 135-degree split point is designed for self-centering and reduced thrust; it can be resharpened on a standard drill sharpener when cutting edges dull, restoring the original geometry.
What limits continuous drilling depth with this 12-inch extension bit?
The manufacturer specifies a maximum drilling depth of 1 1/4 inches per pass, so deeper holes require pecking to clear chips and prevent binding in the flute.
How much heat builds up in the high-speed steel body during all-day drilling?
The bright uncoated HSS material and 21-to-34-degree helix angle promote chip evacuation, but sustained high-speed runs will still generate noticeable heat — use cutting fluid and allow cooling pauses.
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