Separation type bearings. A design of the shaft ring and ring raceway and roller rolling surface of the conical surface vertex to the center needle roller bearings line. A one-way bearing can bear axial load, two-way two-way bearings can withstand axial load.
12, the needle roller bearing
The roller length (L) and roller diameter (Dw) than L/Dw > 2.5 and roller diameter (Dw) < roller bearing 6mm is referred to as the Crossed Roller Slewing Bearing needle roller bearing.
12.1 needle bearing radial size is small, but the radial load carrying capacity is very high, can not bear the axial load, use only as a free end ship loader bearing. Lightweight, miniaturization is beneficial to device.
Needle roller bearings without inner ring 12.2 with or without outer ring, only keep the needle assembly frame, the machining accuracy requirements, the match of the journal and bearing seat hole surface hardness should be the same with the bearing Slewing drives ring rolling.
The coefficient of friction of 12.3 needle bearing large, not suitable for high speed.
没有评论:
发表评论