There is a very big gearbox (2000 x 3000 x 2000 mm) and one bearing at
its mouth is loose, how can we fix it?
We used to weld the loose part and fit the bearing but this causes
deformation of the gearbox shell. What do you think?
Here's more information:
The bearing diameter is about 600 mm you can surely estimate how much
power is exerted upon this big bearing. The bearing is loose enough
that it will turn around togther with the shaft- there is about 1mm
gap between the bearing and the gearbox's shell.
Here's more information:
The bearing diameter is about 600 mm you can surely estimate how much
power is exerted upon this big bearing. The bearing is loose enough
that it will turn around togther with the shaft- there is about 1mm
gap between the bearing and the gearbox's shell.
It is only worn in the housing.
Here's more information:
The bearing diameter is about 600 mm you can surely estimate how much
power is exerted upon this big bearing. The bearing is loose enough
that it will turn around togther with the shaft- there is about 1mm
gap between the bearing and the gearbox's shell.
It is loose only in the housing.
If the gear box case was steel I would weld it up and site machine it to the
correct size, but I guess it is cast iron.
If the bearing housing is very thick then it is probably possible to machine
it out by 5 mm a side and fit a steel sleeve.
A filled epoxy would probably do for a while if you can get the bearing
aligned correctly, but metal spray would probably be the better option.
I would hire a specialist contractor for this work.
There are several metal spray processes, flame spray is the cheaper end,
(may be all you will need), HVOF (good for more difficult problems) and
plasma spray the high integrity end.
Surface preparation is very important.
You may need a bond coat and separate top coat (seek advice from your
contractor) or you could use a one step powder. You probably do not need a
very hard coating for your application this will make it easier to finish
machine.
If corrosion is likely you should seal your coating (seek advice).
PolyTech Forum website is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.