The couplings standards old and new controls: 
 Coupling is an important part of the General Machine Components, a wide range of large mechanical parts for metallurgical and mining, transportation, engineering machinery, aerospace, shipbuilding, machinery, light industry and textile industry. Its main function is to transmit motion and power, due to its use of different occasions, so its transmission range as small as several N · m to a few tens of thousands of large kN · m. 

 Here is the old and new control of the coupling standard (reference only): 


 Coupling standards old and new control 
 Current standards the old standard of the product model, product model 
 JB/T8854.1-2001 GCLD JB/T8854.1-1999 GCLD 
 ZBJ19012-89 
 JB/ZQ4380-86 G Ⅱ CLD 
 JB/T8854.2-2001 G Ⅰ CL JB/T8854.2-1999 G Ⅱ CL 
 ZBJ19013-89 
 JB/ZQ4378-86 
 G Ⅱ CLZ JB/T8854.3-1999 G Ⅱ CLZ 
 ZBJ19014-89 
 JB/ZQ4379-86 
 JB/T8854.3-2001 G Ⅰ CL JB/T8854.2-1999 G Ⅰ CL 
 ZBJ19013-89 
 JB/ZQ4222-86 
 G Ⅰ CLZ JB/T8854.3-1999 G Ⅰ CLZ 
 ZBJ19014-89 
 JB/ZQ4223-86 
 JB/ZQ4644-1997 NGCL JB/ZQ4644-86 NGCL 
 JB/ZQ4645-1997 NGCLZ JB/ZQ4645-86 NGCLZ 
 JB/ZQ4186-1997 WG / / 
 JB/T7001-1993 WGP / / 
 JB/T7002-1993 WGC / / 
 JB/T7003-1993 WGZ / / 
 JB/T7004-1993 WGT / / 
 JB/ZQ4218-86 CL Q/ZB104-73 CL 
 JB/ZQ4219-86 CLZ Q/ZB105-73 CLZ 
 GB/T5272-2002 LM LMD LMS LMZ-Ⅰ LMZ-Ⅱ GB5272-85 ML MLZ MLS MLL-Ⅰ MLL-Ⅱ 
 GB/T4323-2002 LT LTZ GB4323-84 TL TLL 
 GB/T5014-2003 LX LXZ GB5014-85 HL HLL 
 GB/T515-2003 LZ LZJ LZD LZZ GB5015-85 ZL ZLZ ZLD ZLL 
 GB/T6069-2002 GL GB6069-86 GL 
 GB/T5843-2003 GY GYS GYH GB5843-86 YL YLD 
 GB/T5844-2002 UL GB5844-86 UL 
 JB/ZQ4376-1997 YL JB/ZQ4376-86 YL 
 JB/ZQ4384-1997 WHL JB/ZQ4384-86 KL 
 JB/ZQ4018-1997 LLA LLB JB/ZQ4018-86 LLA LLB 
 JB/T5514-1991 TGL / / 
 JB/ZQ4389-1997 brake the wheel JB/ZQ4389-86 brake wheel 


 Transmission link technology and application development trends in recent years include the following: 1. With the host, load analysis and supporting. Such as construction machinery, vehicles, ships, power transmission, the characteristics of the transmission links and engine systems analysis and mechanical properties of load, thus the best choice of the transmission links. (2) the transmission link quality requirements continue to increase, greatly improving the requirements of this raw material, processing and assembly processes, product process and final inspection. (3) with the host requirements change and technology development needs, technology development and technology development of the transmission links more attention. Transmission link itself supporting the professional development. Such as clutch, brake friction materials, the elastic component of the coupling, clutch, brake, hydraulic, pneumatic and electrical components, even casting and forging, heat treatment and standard are more professional package.