How much do you know about the threaded roller bearing?

Bolt-shaped curve rollers are generally full-loaded rollers, and the bolt shaft raceway is quenched. In order to avoid stress concentration, the outer surface of the thick-walled outer ring of the rollers is curved. The outer ring has two integral ribs, and the axial direction is guided by rollers. The bolt shaft head and the press-fitted side retaining ring provide axial support for the outer ring through rollers.

Introduction of threaded roller bearing
threaded roller bearing are suitable for heavier radial loads. Because the outer ring is axially guided by rollers, the bearing can also withstand heavier axial loads, allowing relatively high-speed operation. However, because it is a full-load roller, it is necessary to frequently replenish grease. Lubricant can be filled through the two ends of the mandrel and the holes on the mandrel body.

Classification of threaded roller bearing
1) Basic NUKR series
The bolt-shaft type curve roller NUKR series is a full complement double row cylindrical roller structure.
2) Eccentric sleeve NUKRE series
Bolt-shaft curve rollers NUKRE series and NUKR series are similar to full-complement double-row cylindrical roller structure, the only difference is that the NUKRE series has an eccentric sleeve on the bolt shaft.
3) Double raceway PWKR series
Bolt-shaft type curve rollers PWKR series are similar to NUKR series, both of which are full-complement double row cylindrical rollers. The only difference is that the outer ring of PWKR has double raceways and the two rows of rollers are separated.

4) NUKRA series with side rollers
NUKRA series and NUKR series are similar in appearance. The difference is that NUKRA is a stud bolt, and a side roller is added at the end of the bolt shaft, which causes the structure to change. NUKRA is a single-row full-load cylindrical roller structure. This structure is the first of Wuxi World Bearing and is applying for a patent.
5) KR series
KR series threaded roller bearing are needle roller cage assembly bearings. The outer ring is axially guided by the ribs on the bolts and the retaining ring fixed on the bolts, and can withstand heavier loads and medium speeds. Because there is more grease storage space inside the threaded roller bearing, the lubrication cycle has to be prolonged.
KR is similar to NUKR, except that KR has a retaining ring at both ends, while NUKR has a retaining ring at only one end.

6) KRV series
KRV series threaded roller bearing are full complement needle roller bearings. The outer ring is axially guided by the rib on the bolt and the retaining ring fixed on the bolt. It can bear heavier load but lower speed, but it must be frequently lubricated. fat.
KRV is similar to NUKR, except that KRV has a retaining ring at both ends, while NUKR has a retaining ring at only one end.

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