Difference between bearings 61809 and 6809
Difference between bearings 61809 and 6809
(OP)
I have a shaft running in a tubular housing supported by 3 bearings, the two outboard bearings are 6809 LU by NTN and the center bearing is a 61809 RS with no manufacturer noted. These are all58mm OD,45mm ID and 7mm wide bearings. When pricing them, there is a big difference in the cost, and I was wondering if there really is a difference? Thanks in advance.





RE: Difference between bearings 61809 and 6809
Looks like the 61809 may be a "large" ball series, with attending greater radial capacity and lower limiting speed.
3 bearings on one shaft is frought with perils, mostly manufacturing
A hollow shaft can make bearing fits trickier.
A hollow shaft can bring on HUGE unbalance issues.
RE: Difference between bearings 61809 and 6809
RE: Difference between bearings 61809 and 6809
RE: Difference between bearings 61809 and 6809
For years we've heard stories about counterfeit bearings with questionable quality. I believe them.
I have to think online purchases would make me especially vulnerable to receiving cr*p.
RE: Difference between bearings 61809 and 6809
RE: Difference between bearings 61809 and 6809
So can you suggest me online is good or offline is best source to buy bearings.
RE: Difference between bearings 61809 and 6809
RE: Difference between bearings 61809 and 6809