4 Rail with loose bearing problem
4 Rail with loose bearing problem
(OP)
We have a piece of equipment having two bearing sets of 4 rails with a strip of individual balls. Worked fine for years. Has been a pain for the last three ! At each end of 2 rails is a roll pin stop. The strip of bearings is overrunnng the stops at either end. There is no obvious visual damage or lost parts. The factor rep has serviced the unit twice with new rails and bearings to no avail. Any ideas as to what we need to look for?





RE: 4 Rail with loose bearing problem
Mike Halloran
Pembroke Pines, FL, USA
RE: 4 Rail with loose bearing problem
RE: 4 Rail with loose bearing problem
or where bearing mfg changed, is there increase in heavy loads
Mfgenggear
RE: 4 Rail with loose bearing problem
Considering adding a sleeve over tops to increase diameter.
RE: 4 Rail with loose bearing problem
What does this mean?
may a better description would help.
Mfgenggear
RE: 4 Rail with loose bearing problem
Mfgenggear
RE: 4 Rail with loose bearing problem
As stated, rails, stops, carrier, bearings are all 1 year old. No damage, no wear, no mislocation. No mislocation until the unit is put into motion. The intened motion seems to be the carrier cycles with the sliding member. It appears the carrier will move with the slider, BUT doesn't always return. The balls continue to rotate as expected but the carrier fails to follow the slider. As this continues, the carrier overrides the end stop. End stop is solid but does not extend as far as I would have expected. The stationary and slider stops line up at only one place in the traverse. That would be the only time the bearing cannot override the stop. Otherwise the carrier and balls can flex over the stop and hang up.
My feeling is that something in the assembly or adjustment is causing our problem. Too much or too little tension in the gibb. Too much/too little lubrication. Not really a bearing problem but a machine building or maintenance problem.
Description sufficient?
RE: 4 Rail with loose bearing problem
Just a WAG.
Mike Halloran
Pembroke Pines, FL, USA
RE: 4 Rail with loose bearing problem
is a picture possible or a drawing?
I believe Mike is right., the mechanism has a fault or assembled wrong.
is there an engineering drawing?
mfgenggear
RE: 4 Rail with loose bearing problem
Have you considered bearings that are maintenance-free and lubrication free for your equipment?
RE: 4 Rail with loose bearing problem
Rather than have another $6000.00 service charge (yes, that's thousand) with little effect I disassembled this sucker myself. As previously stated sll bearings and rails were in excellent condition. The stops were straight and solid. BUT the stops were where our "bearing strip" were overriding. I made sleeves to fit over the stops increasing the diameter. All assembled as expected, slides as expected and at present, stop as expected. There is insufficent time to declare this problem fixed, but the unit is back in service, we didn't wait for the service tech, and we didn't spend $6000.00. No one here has said "thanks" or "good work" but how often does that happen?
RE: 4 Rail with loose bearing problem