The difference between HTD and STD toothed timing belts: How to distinguish 8M and S8M timing belts
STD curvilinear tooth belt and HTD curvilinear tooth belt are two common types of timing belts. They are both arc-shaped toothed timing belts. The main difference between them is the shape of the teeth. The tooth shape of the HTD timing belt is a full arc shape; while the tooth shape of the STD timing belt is a flat-top semi-arc shape.
Commonly used specifications and models of HTD type timing belts: HTD3M, HTD5M, HTD8M, HTD14M (abbreviation: 3M, 5M, 8M, 14M,)
Commonly used specifications and models of STD type timing belts: STD3M, STD5M, STD8M, STD14M (abbreviation: S3M, S5M, S8M, S14M)
Therefore, 8M and S8M are two different tooth types, with the same tooth pitch but different tooth shapes.
HTD8M means that the tooth shape of the 8M timing belt is a full arc shape:
STD8M is the S8M timing belt. The tooth shape of the timing belt is a flat-top semicircular arc:
Arc tooth timing belt: HTD3M HTD5M HTD8M HTD14M has the characteristics of high transmission accuracy and low noise.
Flat-top semi-arc timing belts: STD3M, STD5M, STD8M, and STD14M are high-torque and high-precision timing belts. The STD timing belt is an upgraded version of the HTD timing belt with stronger functions, also known as high-torque timing belt.
