Cleveland
Cleveland C57636 Spiral Point Tap 1/2-13 UNC 3 Flutes HSS Black Oxide
Cuts 1/2-13 UNC threads with a three-flute spiral-point design in high-speed steel
- Spiral point pushes chips forward for smoother tapping
- High-speed steel resists wear during repeated threading cuts
- Black oxide finish reduces friction and prevents galling
- Three flutes balance chip clearance with cutting strength
- 1/2-13 UNC size matches standard coarse-thread applications
Thread Cutting Tool for 1/2-13 UNC Holes
This Cleveland spiral point tap creates right-hand unified coarse threads in through-holes. High-speed steel construction with black oxide finish resists wear during repetitive tapping operations. The three-flute design moves chips ahead of the cut for cleaner threads in steel and similar materials. Machinists and maintenance technicians use it for general-purpose threading tasks.
H3 Thread Limit Defines Fit Class
The H3 limit produces a class 2B fit when paired with a 0.4219 inch drill size. Selecting the correct limit prevents loose or oversized threads that could compromise fastener holding power. Verify the limit matches the engineering drawing before cutting. Using a different limit will change the pitch diameter tolerance.
Black Oxide Finish and Plug Chamfer
The oxide coating holds cutting fluid to reduce friction and extend tool life in ferrous metals. Plug chamfer length of 1 21/32 inches provides easier starting than bottoming taps while still reaching deep holes. No external coolant system or holder is included with the tap. Lubricant choice and tapping speed remain the operator's responsibility.
Highlights
- Spiral point pushes chips forward for smoother tapping
- High-speed steel resists wear during repeated threading cuts
- Black oxide finish reduces friction and prevents galling
- Three flutes balance chip clearance with cutting strength
- 1/2-13 UNC size matches standard coarse-thread applications
Specifications
| Brand | CLEVELAND |
|---|
Questions about this item
What does the 1/2-13 UNC thread size mean when I am tapping a hole?
It means the tap cuts a half-inch diameter thread with 13 threads per inch in the Unified National Coarse standard, producing a standard coarse thread for general fastening.
How does the H3 thread limit and 2B class of fit affect the finished thread?
The H3 limit places the pitch diameter slightly above basic size, and the 2B class provides a standard commercial fit with normal allowance for plating or minor variation.
What drill size and shank clearance do I need for this 3 3/8 in overall length tap?
Use a .4219 in drill for 75 percent thread engagement; the tap shank fits standard half-inch tap holders or wrenches for the 3 3/8 in overall length.
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