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Description
Technical data for the UNEF 1 1/4-18 die
| Technical data | ||
|---|---|---|
| Nominal Diameter d1 Inches/mm/Decimal | UNEF 1 1/4-18 | |
| Thread Pitch P in Inches and mm | 18 threads per inch | 1.41 mm |
| Thread Diameter mm / Decimal | 31.75 mm / 1.25 in | |
| Outside Diameter d2 | 65 mm | |
| Thickness h1 | 18 mm | |
| Number of Chip Holes | 6 | |
| Thread angle G | 60° | |
| Thread Standard | ANSI B-1.1 | |
Die UNEF 1 1/4-18 HSS – large-size inch threading die
Die UNEF 1 1/4-18 is a professional tool for cutting large-diameter external threads to the American extra-fine thread standard. Made of high-speed steel (HSS) in accordance with DIN 22568, it cuts threads with a diameter of 1 1/4 inches (31.75 mm) at 18 threads per inch.
Main advantages of the UNEF 1 1/4-18 die
- Extra fine pitch, 18 TPI – closely spaced threads on a large cross section ensure precision and vibration resistance
- HSS high-speed steel – capable of machining structural steels up to 800 MPa as well as aluminum and brass
- Tolerance 2A in accordance with ANSI B1.1 – standard accuracy class for industrial fits
- 60° thread profile – full compatibility with the Unified thread family
- DIN 22568 standard – guaranteed quality and fit for large-size die stocks
Die UNEF 1 1/4 is used in the aerospace and power industries and for servicing heavy American machinery. A diameter of 31.75 mm with a pitch of 18 TPI is a choice for demanding joints with large cross sections requiring maximum stability.
Frequently asked questions
A diameter of 1 1/4 inches equals 31.75 mm. The conversion factor is 25.4 mm per inch. Calculation: 1.25 × 25.4 = 31.75 mm.
UNEF (Extra Fine) has the finest pitch among the Unified standards. UNC is coarse, UNF is fine and UNEF is extra fine. For the 1 1/4-inch size: UNC has 7 TPI, UNF has 12 TPI and UNEF offers 18 TPI.
The Unified family also includes: UNC – coarse threads, UNF – fine threads, UNS – special threads with nonstandard dimensions, and UN – constant-pitch series with 4, 6, 8, 12, 16, 20, 28 or 32 threads per inch.
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Shipping
All orders are delivered by courier company GLS. For orders exceeding 369 PLN gross shipping is FREE
| Courier GLS | Przelew24 / Prepayment | 14,76 zł gross | Delivery time 1 working day |
| Courier GLS | Cash on delivery | 17,26 zł gross | Lead time 1 working day |
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