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LT is an oilfield clutch. The LT is used primarily on drilling equipment manufactured in China, Russia, and Romania. The LT is interchangeable with Drawworks Lanzhou LS®, Honghua® and Upetrom® products.An integrated neoprene tube, reinforced with ply cords, is vulcanized to the inside of a steel rim. A set of friction shoes are connected to the inside of the tube using shoe pins and a lock wire kit. When the tube is pressurised, the friction shoes are forced to engage around the drum. The rubber nylon cord-reinforced air tube forces the element’s friction shoe assemblies against the outer edge of the drum.
Size | Outer diameter （D） mm | Inner diameter （d） mm | Breadth of section（B） mm | Friction wheel width（b） mm | Nozzle number | Nozzle internal thread mm | Nozzle height mm | Connection plate number |
| LT200×75 | 288 | 219 | 90 | 73 | 1 | M16×1 | 6 | 4 |
| LT290×100 | 290 | 224 | 93 | 78 | 1 | M12×1.5 | 15 | 6 |
| LT290×148 | 290 | 224 | 148 | 133 | 1 | M20×1.5 | 15 | 6 |
| LT300×100 | 392 | 315 | 115 | 98 | 1 | M20×1.5 | 20 | 6 |
| LT300×150 | 392 | 313 | 150 | 133 | 1 | M20×1.5 | 20 | 6 |
| LT400×125 | 517 | 420 | 166 | 125 | 1 or 2 | M20×1.5 | 20 | 6 |
| LT500×125 | 645 | 521 | 152 | 123 | 1 or 2 | M20×1.5 | 20 | 6 |
| LT600×125 | 750 | 622 | 153 | 123 | 1 | M20×1.5 | 20 | 6 |
| LT700×200 | 800 | 723 | 243 | 198 | 2 | M33×1.5 | 27 | 8 |
| LT700×135 | 814 | 722 | 164 | 137 | 2 | M20×1.5 | 20 | 6 |
| LT800×135 | 915 | 822 | 164 | 137 | 2 | M20×1.5 | 20 | 8 |
| LT1070×200 | 1270 | 1093 | 243 | 198 | 2 | M33×1.5 | 27 | 8 |
| LT1000×250 | 1040 | 880 | 290 | 246 | 1 | M33×1.5 | 27 | 12 |
| IA-617 | 615 | 540 | 147 | 130 | 1 | ZG3/8 “ | 10 | 8 |
