1. Product details:
1) Standard: API 5CT&5B
2) Material: J55, K55, L80, N80, P110.
3) Type: STC /BTC/ LTC/NUE/EUE
4) Inside Phosphate Treatment & Outside coating
5) OD: 2 3/8"- 20"
6) Standard Export Package: such as wooden pallet

2. Abstract:
A coupling is a device used to connect two shafts together at their ends for the purpose of transmitting power. Couplings do not normally allow disconnection of shafts during operation, however there are torque limiting couplings which can slip or disconnect when some torque limit is exceeded.
The primary purpose of couplings is to join two pieces of rotating equipment while permitting some degree of misalignment or end movement or both. By careful selection, installation and maintenance of couplings, substantial savings can be made in reduced maintenance costs and downtime.

3. Features:
1). widely used in various mechanical and hydraulic fields;
2). No backlash, rigid in twisting direction;
3).High precision in transmission and high rotating speed;
4).The highest applicable temperature is 280 degree;
5). Good elasticity, height strength, corrosion resistant, wearable;
6). No need to lubricate, quiet operation, no wear or slipping, reducing energy losing;
7). Quick and easy mounting and disassembly;
8). Small dimension, low weight, high transmitted torque
9). Eastover's made of polyurethane with shore hardness between 80 and 98;
10). Compensating the axial relative drift, buffer and vibration reduction.

4. Application:
1) To provide for the connection of shafts of units those are manufactured separately such as a motor and generator and to provide for disconnection for repairs or alternations.
2) To provide for misalignment of the shafts or to introduce mechanical flexibility.
3) To reduce the transmission of shock loads from one shaft to another.
4) To introduce protection against overloads.
5) To alter the vibration characteristics of rotating units.