Cleveland
Cleveland C59193 Thread Forming Tap #4-40 Plug Bright 0 Flutes
Forms #4-40 UNC threads in 1.88 in high-speed steel with H3 limits and .31 in thread length
- TypeTaps
- Forms threads in #4-40 UNC holes
- High-speed steel resists wear during tapping
- Bright finish suits general-purpose use
- 88 in overall length reaches deep threads
- Plug chamfer starts threads cleanly
Cleveland C59193 Thread Forming Tap #4-40
The Cleveland C59193 is a thread forming tap designed for creating internal threads in ductile materials. It suits machinists and maintenance technicians who need to produce #4-40 UNC threads without cutting chips. The tool forms threads by displacing metal, which can increase thread strength in suitable applications.
Bright uncoated high speed steel construction
The bright, uncoated high speed steel substrate provides a clean surface for forming threads in non-ferrous metals and softer steels. Zero flutes eliminate chip evacuation concerns, making the tool effective for blind holes where chip packing is a risk. The plug chamfer assists in starting the thread squarely in the workpiece.
Right hand H3 limit for 2B class of fit
The right hand thread direction matches standard fastening requirements. An H3 thread limit targets a 2B class of fit, ensuring proper engagement with mating fasteners. Overall length measures 1.88 in with a .31 in thread length, defining the reach and cutting depth available for the operation.
Highlights
- Forms threads in #4-40 UNC holes
- High-speed steel resists wear during tapping
- Bright finish suits general-purpose use
- 88 in overall length reaches deep threads
- Plug chamfer starts threads cleanly
Specifications
| Brand | CLEVELAND |
|---|---|
| Type | Taps |
Questions about this item
How often should I replace the #4-40 tap when forming threads in aluminium?
Replace the tap when the formed threads no longer gauge to the 2B class of fit; H3 limit taps typically last thousands of holes in aluminium before wear exceeds tolerance.
What limits how many holes I can tap continuously with this 1.88 in overall length tool?
Chip evacuation in the fluteless design is the first limit; forming torque builds heat, so pause to apply cutting fluid and let the High Speed Steel cool every few dozen holes.
Does the bright uncoated finish make the tap run hotter during all-day threading?
The uncoated High Speed Steel surface generates more friction than coated taps, so use plenty of cutting fluid to control heat and prevent galling during extended runs.
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