The item you are referencing is a RIDGID 66110 18 BSPT TPI-RH, which is a professional-grade, high-speed steel threading die. It is specifically designed for cutting British Standard Pipe Taper (BSPT) external threads onto pipes and rods.
The codes on the die (“0-R, 11-R, 00-R, 111-R, 12-R”) are size identifiers for the different BSPT thread sizes this single die can cut, making it a versatile, multi-size tool.
Detailed Product Description
1. Brand & Model:
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Brand: RIDGID
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Catalog Number: 66110
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Die Head Size: This is an 18-R series die, meaning it is designed to be used with RIDGID No. 18 (or compatible) ratchet-style die stocks and threaders.
2. Thread Standard:
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Thread Type: BSPT (British Standard Pipe Taper)
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Meaning: This is a tapered pipe thread standard used extensively in Europe, Asia, Australia, and other parts of the world. The taper ensures a pressure-tight seal through metal-to-metal wedging, often used with thread sealant tape or compound. It is not compatible with NPT (National Pipe Taper) threads, which are the standard in the United States.
3. Thread Specifications:
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TPI: TPI-RH
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Meaning: Threads Per Inch – Right Hand. This die cuts standard right-hand threads (threads that tighten when turned clockwise). The TPI varies depending on which of the five sizes you select on the die.
4. Key Feature: Multi-Size Capability
This is a 5-in-1 adjustable die. By rotating the central die ring, you can select from five different BSPT thread sizes. This eliminates the need to carry five separate, individual dies.
The size codes and their corresponding standard BSPT dimensions are:
| Die Ring Code | Common BSPT Designation | Threads Per Inch (TPI) | Major Diameter (Approx.) |
|---|---|---|---|
| 0-R | 1/8″ BSPT | 28 TPI | ~9.7 mm |
| 11-R | 1/4″ BSPT | 19 TPI | ~13.2 mm |
| 00-R | 3/8″ BSPT | 19 TPI | ~16.7 mm |
| 111-R | 1/2″ BSPT | 14 TPI | ~20.9 mm |
| 12-R | 3/4″ BSPT | 14 TPI | ~26.4 mm |
5. Construction & Design:
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Material: The cutting teeth are made from High-Speed Steel (HSS), which provides excellent durability, heat resistance, and a long service life, even when used on harder materials.
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Adjustability: The segmented chaser design allows for slight size adjustment to compensate for wear or to achieve a perfect thread fit.
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Chasers: The die uses replaceable, hardened steel chasers (the parts that do the actual cutting). When they become worn, you can replace them instead of the entire die head.
6. Intended Use:
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This tool is used by plumbers, pipefitters, and maintenance technicians to create or repair external BSPT threads on pipes, bolts, or fittings.
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It is commonly used in industrial plumbing, hydraulic systems, and process piping for water, oil, gas, and air.
7. Required Accessories:
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To use this die, you must have a RIDGID No. 18 Ratchet Die Stock or a compatible wrench. This handle provides the leverage needed to turn the die and cut the threads.
