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Description
Technical data for the 1 1/4 inch left-hand die
| Technical data | ||
|---|---|---|
| Nominal diameter d1 inches/mm | G 1 1/4 inch | 41.91 mm |
| Thread pitch P inches/mm | 11 threads per inch | 2.30 mm |
| Outside diameter d2 | 75 mm | |
| Thickness h1 | 20 mm | |
| Number of chip clearance holes | 8 | |
| Required shaft diameter | 41.73 mm | |
| Thread angle G | 55° | |
| Thread standard | BSP DIN ISO 228 | |

Die 1 1/4 inch left-hand G HSS – specialized tool for left-hand pipe threads
Die 1 1/4 inch left-hand is a specialized tool designed for cutting parallel pipe threads left-hand of the G (BSPP) type with a 55° profile. The inch-size left-hand pipe die, made from high-speed steel (HSS), ensures precise threading of steel and copper pipes and brass components. Compliance with DIN EN 24231 guarantees compatibility with fittings used in systems requiring left-hand connections.
Key advantages of the 1 1/4 inch left-hand pipe die
- HSS high-speed steel – enables machining of materials with tensile strengths up to 800 MPa while maintaining cutting edge durability
- Left-hand BSPP parallel thread with a 55° profile – ensures leak-tight gasketed connections in systems requiring protection against self-loosening
- Outside diameter 41.91 mm – conforms to the BSP standard for the nominal size of 1 1/4 inches
- Manufactured in accordance with DIN EN 24231 – confirms dimensional compliance with international pipe thread standards
- Deep flutes – ensure effective chip evacuation when threading larger diameters
The 1 1/4 inch left-hand pipe die is used in specialized installations requiring left-hand threads – in counter-rotating connections in rotating machinery, certain gas systems, and systems designed to prevent self-loosening. The tool performs well when threading steel and copper pipes and brass components.
The 1 1/4 inch left-hand threading die is essential equipment for specialists carrying out nonstandard installation projects. Order a tool that guarantees precision in demanding applications.
Frequently asked questions
The designation 1 1/4 inches (31.75 mm / 3.175 cm) refers to the nominal pipe size, not the thread diameter. The BSP standard accounts for pipe wall thickness, so the actual outside diameter of the G 1 1/4 thread is 41.91 mm.
Left-hand threads are used in rotating machinery where the direction of operation would cause a right-hand thread to unscrew. They are also used in gas systems and counter-rotating connections requiring protection against self-loosening.
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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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