what's the difference between ball bearings and roller bearings?

• Different principles

(1)Ball bearing:The spherical alloy steel ball is installed in the middle of the inner steel ring and the outer steel ring to reduce the friction in the power transmission process and improve the transmission efficiency of mechanical power.Ball bearings cannot withstand large heavy loads,which are more common in light industrial machinery.

(2)Roller bearing:The journal rotation and usually installed on the positioning ring with a number of rollers in circular contact,roller bearings can be pre-tightened to achieve good accuracy and rigidity. An inner ring with taper can also be used.

•Different performance

(1)Ball bearings:generally used in low-load mechanical transmission equipment.Because the bearing area of ball bearings is small,it is easy to have serious mechanical damage in the case of high-speed operation,so in the mechanical transmission of heavy loads,needle roller bearings are often used to increase the bearing surface,improve the mechanical transmission efficiency,and reduce mechanical damage.

(2)Roller bearings:Roller bearings can be pre-tightened to achieve good accuracy and rigidity.The inner ring with taper can also be used to adjust the working clearance of the bearing arbitrarily.This solution can fully achieve the printing machine roller bearing zero clearance requirements.

 Ball Bearing from China, Ball Bearing Manufacturer & Supplier - ALM (autolinearmotion.com)