Cleveland
Cleveland C86116 Spiral Point Tap 5/16-18 UNC 3 Flutes TiAlN
Creates 5/16-18 UNC threads with a TiAlN-coated cobalt spiral-point tap featuring three flutes and a plug chamfer
- Spiral-point design pushes chips forward for cleaner through-holes
- TiAlN coating on cobalt substrate resists wear at higher cutting speeds
- 5/16"-18 UNC 2B class of fit meets standard thread requirements
- Three-flute geometry balances chip clearance with thread strength
- 1-3/8" thread length suits deeper tapping operations
Cleveland C86116 Spiral Point Tap
The Cleveland C86116 is a spiral point tap designed for creating UNC threads in through-hole applications. It suits machinists and maintenance technicians who need reliable thread production in steel and similar materials. The TiAlN coating enhances wear resistance during repetitive cutting cycles.
5/16-18 UNC capacity and limits
This tap cuts a 5/16-18 UNC thread with a 3 35/64 inch overall length and 1 3/8 inch thread length. The 75 percent thread drill size F and 2B class of fit provide standard engagement for general-purpose fastening. Three flutes and a plug chamfer push chips ahead of the cut, preventing clogging in through holes but limiting use in blind-hole work.
Upgrade from uncoated or two-flute taps
The TiAlN surface and cobalt substrate replace uncoated high-speed steel taps when tool life and heat resistance become priorities. The three-flute design improves chip evacuation over two-flute versions in medium-volume production. The jump is worth it when thread consistency and reduced tap breakage outweigh the higher initial cost.
Highlights
- Spiral-point design pushes chips forward for cleaner through-holes
- TiAlN coating on cobalt substrate resists wear at higher cutting speeds
- 5/16"-18 UNC 2B class of fit meets standard thread requirements
- Three-flute geometry balances chip clearance with thread strength
- 1-3/8" thread length suits deeper tapping operations
Specifications
| Brand | CLEVELAND |
|---|
Questions about this item
Will the 5/16-18 UNC thread fit the existing holes in my older fixture?
The tap cuts a standard 5/16-18 UNC thread with a Class 2B fit, matching legacy hardware built to the same specification.
How can I confirm the TiAlN coating is performing during the first few holes?
Expect reduced friction, gold-coloured chips evacuating ahead of the tap, and consistent thread quality without built-up edge on the cobalt flutes.
Does the package include the 75 percent thread drill size F bit needed before tapping?
Only the spiral-point tap is supplied; the F-size drill for 75 percent thread engagement must be purchased separately.
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