body：Surface Hardness HRC 50~54Use MnB as material and fully heat-treated technology to enhance wear-resistance.
Axle:Surface heat-treated to ensure the strength and performance of products/ using 100% Digital-control processing device to ensure the dimensional accuracy and quality stability.
Cover: Made by high-quality casting steel.
Seal:Special casting steel ring with O-ring, apply to extremely working environment.
Sleeve:Surface-coated with Copper to enhance wear-resistance
Supply for W2100,w2200,w2000,w1900,w1900DC,w1200