shaft material for needle bearing
shaft material for needle bearing
(OP)
Hello,
I using a needle bearing on a 416 SS shaft. I need a hardness RC 41- 45 for this application. The heat treatment is distorting the shaft hence I am looking into a different material which can be hard enough for needle bearings. Also pre hardened hardness on this shaft is RC 29 is that good enough for needle bearing use. What is the general practise in the industry when using needle bearings.....
Thanking you in advance.
I using a needle bearing on a 416 SS shaft. I need a hardness RC 41- 45 for this application. The heat treatment is distorting the shaft hence I am looking into a different material which can be hard enough for needle bearings. Also pre hardened hardness on this shaft is RC 29 is that good enough for needle bearing use. What is the general practise in the industry when using needle bearings.....
Thanking you in advance.





RE: shaft material for needle bearing
RE: shaft material for needle bearing
RE: shaft material for needle bearing
For Stainless Steel we use 440C which thru hardens, the non-bearing surface is drawn back and the bearing surface is ground.
RE: shaft material for needle bearing
Try Thomson Industries:
http://www.thomsonindustries.com/Section...
There Case 60 shafting is outstanding.
RE: shaft material for needle bearing
In rolling bearings which do not have inner or outer ring to provide a raceway, the rolling elemets run directly on the shaft or housing bore. The shaft or housing should be designed as a raceway.
Material for rolling bearing raceways:
Through hardened steels to DIN 17230, eg.100Cr6. These steels can also be surface hardened.
Case hardening steels to DIN 17230, eg.17MnCr5 or 16MnCr5
Steels for flame or induction hardening to DIN 17230, eg.Cf54 or to DIN 17212, eg.CF53.
Heat treatment of materials. For case hardening, flame or induction hardening steel, the following must be ensured:
a surface hardness of 670 +170HV, a sufficient hardness depth Eht or Rht. According to DIN 50190 the hardness depth is the vertical distance from the surface where a reference hardness of 550HV is persent. It is measured on a finish ground shaft and should correspond at least to the lower values given. It must be >=0.3mm.
Case hardening Eht>=0.078.Dw
further information can be obtain from www.ina.com