Cleveland
Cleveland 57216 Spiral Point Tap 1/2-13 UNC 3 Flutes H5 High Speed Steel
Creates UNC threads in through-holes using a three-flute high-speed steel spiral-point design
- Spiral-point design pushes chips ahead for smoother threading in through-holes
- Three flutes balance chip clearance and cutting strength for reliable performance
- High-speed steel construction resists wear during repetitive tapping operations
- H5 thread limit matches 2B-3B class of fit for accurate internal threads
- Bright uncoated finish suits general-purpose use in steel and non-ferrous metals
1/2-13 UNC Spiral Point Tap
The Cleveland 57216 is a right-hand spiral point tap cut for 1/2-13 UNC threads. High-speed steel construction suits general-purpose threading in steel and non-ferrous metals. Three flutes provide chip clearance for through-hole work. Designed for machinists and maintenance crews cutting new internal threads.
H5 limit and 75 % drill size
The H5 thread limit targets a 2B-3B class of fit for standard tolerance holes. A 0.4219 in drill produces the recommended 75 percent thread engagement. Overall length is 3 3/8 in with a 1 21/32 in thread length. Bright uncoated finish requires cutting fluid to prevent galling and extend tool life.
Upgrade from hand taps
Replaces straight-flute hand taps when machining through-holes in production runs. Spiral point pushes chips ahead of the cut, reducing torque and tap breakage. Worth the switch when thread volume justifies faster cycle times and longer tool intervals. Not suited for blind-hole applications where chips must be pulled out.
Highlights
- Spiral-point design pushes chips ahead for smoother threading in through-holes
- Three flutes balance chip clearance and cutting strength for reliable performance
- High-speed steel construction resists wear during repetitive tapping operations
- H5 thread limit matches 2B-3B class of fit for accurate internal threads
- Bright uncoated finish suits general-purpose use in steel and non-ferrous metals
Specifications
| Brand | CLEVELAND |
|---|
Questions about this item
Which thread limit should I choose for a standard internal thread?
The H5 limit is sized for a Class 2B-3B fit, which covers most general-purpose internal threads in steel and aluminium.
What does the 75 percent thread drill size of .4219 in mean when I am tapping?
Drill the hole to .4219 in before tapping; this produces roughly 75 percent thread engagement for the 1/2-13 UNC thread.
How does the spiral point design affect chip flow in a through hole?
The spiral point pushes chips ahead of the tap, so they exit the far side of a through hole instead of packing the flutes.
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