Cleveland
Cleveland C55317 Spiral Point Tap 1/4"-20 Plug UNC 2 Flutes TiN pneumatic accessory
Cuts 1/4"-20 UNC threads with a spiral-point plug tap made from TiN-coated high-speed steel
- TypeTaps
- 1/4"-20 UNC thread cuts standard coarse holes
- Spiral point pushes chips forward for through-holes
- TiN coating reduces wear on high-speed steel
- Two flutes balance strength and chip clearance
- Plug chamfer starts threads easily in existing holes
Cleveland C55317 Spiral Point Tap
The Cleveland C55317 is a spiral point tap designed for creating internal UNC threads in through-hole applications. It suits machinists and maintenance technicians who need reliable thread production in steel or similar materials. The 2-flute geometry supports efficient chip evacuation forward through the hole. This tool is not for blind-hole work or for users who require a bottoming chamfer.
TiN Coating and High Speed Steel
The TiN coating increases surface hardness and reduces friction compared to uncoated high speed steel. This combination extends tool life and allows higher cutting speeds in compatible materials. The coating also improves chip flow across the flutes during operation. Buyers who need maximum wear resistance in abrasive alloys may find the standard TiN layer insufficient for long production runs.
1/4"-20 UNC Thread Limit H5
The tap cuts a 1/4"-20 UNC thread to a class 2B fit with an H5 pitch diameter limit. This tolerance band suits general-purpose fastening where standard commercial nuts and bolts are used. The 75 percent thread drill size #7 prepares the correct hole for this thread form. Shops requiring tighter pitch diameter control or a different class of fit cannot use this specific H5 limit tool.
Highlights
- 1/4"-20 UNC thread cuts standard coarse holes
- Spiral point pushes chips forward for through-holes
- TiN coating reduces wear on high-speed steel
- Two flutes balance strength and chip clearance
- Plug chamfer starts threads easily in existing holes
Specifications
| Brand | CLEVELAND |
|---|---|
| Type | Taps |
Questions about this item
How often will the TiN coating on this 1/4"-20 tap need replacement under normal use?
The TiN coating is a surface treatment on the high-speed steel body; it wears gradually and cannot be replaced separately — the tap itself is replaced when threads cut poorly.
What is the first limitation when running this H5-limit tap continuously in production?
The H5 thread limit and 75 % thread drill size #7 define the fit envelope; sustained use will first show wear on the two-flute cutting edges before any dimensional limit is reached.
How much heat does this 2-1/2 in spiral-point tap generate during all-day pneumatic tapping?
Heat builds at the cutting zone; the TiN layer reduces friction, but continuous operation still requires cutting fluid and periodic pauses to keep the tool and workpiece from overheating.
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