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Lian Feng spindle

Panhead59

Plastic
Joined
Feb 12, 2019
I have a Lian Feng LF 818 HD surface grinder
Wanting to replace spindle bearings but the spindle drawing I have is for a direct drive machine mine is a belt drive. I would like to get a print of the spindle I have to make sure it is assembled correctly.
 
If you know what language was spoken where the machine was built you might try using the google translator to give you the script to ask the net for the phone number, if it's still being built. I've done that for a few foreign objects I wanted info on, it can work but it takes imagination and patience, as sentence structure can be very different. Try one english search string to translate, then another etc until you get a phone number into an office, then ask if anyone speaks English.
 
Is it not possible to document how it goes together when you take it apart?
Are you concerned that some else has been in there and put it together wrong?
I have taken some apart and found bearings installed backwards or lower than required class used so that can be a problem.
Surface grinder spindles are not complicated but they are picky about assembly and techniques if you want long life.
The big things are clean, very lightly stone, clean, clean again dust and lint free.
Ideally you indicate everything to sub-microns but most can't fix if out so that's not real helpful.
Finish steps best not done on the shop floor.
I don't have a clean room but the front office air is cleaner than the shop.
Oh, and make sure to put the correct number of ccs of clean grease into the bearings. This one is a often oops.
Don't overgrease. Bit by this one myself in my "non-understanding" days.

Making it run is one thing, making it run 40,000 hours is another.
When you get into a unknown spindle mark front on everything as you take it apart. Try to understand how it is all supposed to work and why.
The most standard setup is a preloaded pair up front and a radial on the back.
Note that my Okamoto is not that way so there are variations. In fact it has a spindle design that I'd call questionable.
Some Pope surface grinding spindles have some really complicated things going on with tapers inside the inner bearing races.
Bob
 
That’s where the problem is. Someone was into it changed bearings based on the part numbers for the direct drive spindle. Which are angular contact bearings such as u mentioned in your reply. So I need print and parts list that match the spindle that I have to make sure the correct bearings were used and are assembled in the proper way.
 








 
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