Cleveland
Cleveland C86115 Spiral Point Tap 1/4-28 UNF Cobalt TiAlN 3 Flutes
A spiral-point tap for cutting 1/4-28 UNF threads in cobalt steel with a TiAlN coating and three flutes
- 1/4-28 UNF threading for precise fits
- Cobalt construction resists wear in tough materials
- TiAlN coating extends tool life under heat
- Spiral point pushes chips forward for smooth tapping
- Three flutes balance strength and chip clearance
Cleveland C86115 Spiral Point Tap
The Cleveland C86115 is a spiral point tap designed for creating unified national fine threads in metalworking applications. It suits machinists and maintenance technicians who need reliable thread cutting in through-hole operations. The cobalt construction with TiAlN coating provides enhanced wear resistance during production runs. This tool addresses the need for accurate 1/4-28 UNF threads in industrial settings.
Thermals noise and power draw
As a hand-operated or machine-driven cutting tool, the tap generates negligible heat and noise during normal threading operations. Power consumption depends entirely on the driving equipment used rather than the tap itself. The TiAlN coating reduces friction at the cutting edges, which helps maintain lower temperatures at the thread interface. No electrical or pneumatic supply connects directly to this accessory.
1/4-28 UNF thread specification
The defining specification is the 1/4-28 UNF thread form with a 2B class of fit and 75 percent thread drill size of 5.45 mm. This determines compatibility with matching fasteners and tapped holes in unified fine thread assemblies. Builders requiring coarse threads, metric pitches, or different diameters must select an alternative tap. The three-flute spiral point geometry optimises chip ejection ahead of the cut in through-hole work.
Highlights
- 1/4-28 UNF threading for precise fits
- Cobalt construction resists wear in tough materials
- TiAlN coating extends tool life under heat
- Spiral point pushes chips forward for smooth tapping
- Three flutes balance strength and chip clearance
Specifications
| Brand | CLEVELAND |
|---|
Questions about this item
How do I install the Cleveland C86115 spiral point tap and which drill size avoids oversize threads?
Drill a 5.45 mm hole to the 75 percent thread depth, then run the tap straight with cutting fluid; the spiral point pushes chips ahead so the hole must be deep enough for chip clearance.
What maintenance or replacement will this cobalt TiAlN tap need after extended use?
The TiAlN coating resists wear but cannot be re-sharpened; once the cutting edges dull the tap must be replaced because cobalt substrates are too hard for conventional regrinding.
What limit appears first when tapping 1/4-28 UNF threads continuously in stainless steel?
Heat buildup at the 3-flute cutting zone degrades the coating before the 2B thread limit is exceeded, so cutting speed and coolant flow become the practical constraints.
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