How is the needle roller of the needle bearing machine processed, the finish is so high
Needle roller process:
Blank forming → deburring → heat treatment → coarse, fine, final grinding rolling surface → ultra-finished rolling surface or sawdust polishing.
For flat head or cone needle roller, if it is difficult to ensure the length dimension tolerance of the blank forming, the double end process can be increased. If a convex shaped busbar rolling surface is required, it can be carried out directly in the superfinishing rolling surface or the calendering process.
A needle bearing is a roller bearing with a cylindrical roller. The roller is thin and long relative to its diameter. This type of roller is called a needle roller.
Despite the small cross-section, the bearing still has a high load bearing capacity, and the needle bearing is equipped with a thin and long roller (roller diameter D≤5mm, L/D≥2.5, L is the roller length), so The radial structure is compact, its inner diameter size and load capacity are the same as other types of bearings, and the outer diameter is the smallest, which is especially suitable for the support results of limited radial mounting dimensions. Depending on the application, bearings or needle roller and cage assemblies without inner ring are available. The journal surface and the housing hole surface that match the bearing directly serve as the inner and outer rolling surfaces of the bearing to ensure load capacity and running performance. As with ferrule bearings, the hardness of the raceway surface of the shaft or housing bore, the machining accuracy and surface quality should be similar to the raceway of the bearing ring.
This type of bearing can only withstand radial loads.
The drawn cup needle roller bearings are needle bearings with a thin stamped outer ring.