Cleveland
Cleveland C55387 Spiral Point Tap 1/4"-28 UNF 3 Flutes TiCN
Creates 1/4"-28 UNF threads in through-holes with a spiral-point design that pushes chips forward, three flutes for stability, and a TiCN coating on high-speed steel for extended wear resistance
- Creates precise UNF threads with 1/4"-28 sizing
- TiCN coating extends tool life in tough materials
- Spiral point design pushes chips forward for clean holes
- Three flutes balance strength and chip clearance
- H2 limit ensures Class 2B fit accuracy
Cleveland Spiral Point Tap 1/4"-28 UNF
This Cleveland spiral point tap cuts unified fine threads in a 1/4"-28 size. It is designed for through-hole tapping in a range of materials. The TiCN coating adds wear resistance for longer tool life. Right-hand cutting direction suits standard threading operations.
High-speed steel construction with three flutes
The high-speed steel body provides the hardness needed for repetitive threading tasks. Three flutes allow chips to be pushed forward and out of the hole, reducing clogging. A 75 percent thread drill size of 5.45 mm prepares the correct pilot hole. The H2 thread limit produces a class 2B fit for standard assemblies.
TiCN coating sustains cutting edges under load
During extended production runs the titanium carbonitride layer reduces friction and heat buildup at the cutting edges. This helps maintain thread accuracy over many holes compared with uncoated taps. The 1 inch thread length and 2 1/2 inch overall length give adequate reach for typical through-hole depths. Builders needing larger diameters or different pitch standards will require a separate tap.
Highlights
- Creates precise UNF threads with 1/4"-28 sizing
- TiCN coating extends tool life in tough materials
- Spiral point design pushes chips forward for clean holes
- Three flutes balance strength and chip clearance
- H2 limit ensures Class 2B fit accuracy
Specifications
| Brand | CLEVELAND |
|---|
Questions about this item
What thread limit does the H2 class of fit reach before the tap starts to bind in sustained threading?
The H2 limit with a 2B class of fit is designed to cut threads within the specified tolerance range for 1/4"-28 UNF holes.
How much heat builds up in the TiCN-coated flutes when the tap runs continuously in steel?
The TiCN coating on the high-speed steel flutes reduces friction and heat generation during extended tapping operations.
Which drill size must I already have to prepare the 75 percent thread hole for this tap?
A 5.45 mm drill is required to produce the correct 75 percent thread depth before tapping.
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