Hi all,
During the lockdown period I stripped my J&S 540 to the bone, the previous owner did not tend to the machine as one would have hoped (did not cover all the parts, worked with the machine without the covers on the front side under the spindle etc) which resulted in grinding dust entering all the cavities and doing damage to the column guides predominantly.
I have replaced the column guides and obviously cleaned everything and gave it a nice new coat of paint.
The question I have is the followin: The column rollers have three parts, the outer ring in which the column rollers run, one inner race for the roller bearings and cylindrical bearings and then one cone which only presses against the roller bearings solely. Between the two inner races there is a spacer and according to the parts manual there may or may not be a shim. It had two shims on the right side of the machine with two spacers and on the left, only the two spacers. However, nothing is the same thickness and I did not measure each part, cone etc when I stripped it which in retrospect, would have been the clever thing to do if they were then also marked.
I have assembled everything and all the rollers as assembled have 0.12mm of axial play, which to my mind is not correct (and way too much) as the column head will not be stable and that would introduce error.
Does anyone perhaps have specifications on allowable endplay, axially or what it should be?
If I remove the spacers then there is no play but seeing as the manual states that there should be spacers, it makes me wonder. the manual is silent on the allowable play. (PS,I hate shims). My logic tells me that the endplay should be at a minimum.
Any advice will be appreciated.
During the lockdown period I stripped my J&S 540 to the bone, the previous owner did not tend to the machine as one would have hoped (did not cover all the parts, worked with the machine without the covers on the front side under the spindle etc) which resulted in grinding dust entering all the cavities and doing damage to the column guides predominantly.
I have replaced the column guides and obviously cleaned everything and gave it a nice new coat of paint.
The question I have is the followin: The column rollers have three parts, the outer ring in which the column rollers run, one inner race for the roller bearings and cylindrical bearings and then one cone which only presses against the roller bearings solely. Between the two inner races there is a spacer and according to the parts manual there may or may not be a shim. It had two shims on the right side of the machine with two spacers and on the left, only the two spacers. However, nothing is the same thickness and I did not measure each part, cone etc when I stripped it which in retrospect, would have been the clever thing to do if they were then also marked.
I have assembled everything and all the rollers as assembled have 0.12mm of axial play, which to my mind is not correct (and way too much) as the column head will not be stable and that would introduce error.
Does anyone perhaps have specifications on allowable endplay, axially or what it should be?
If I remove the spacers then there is no play but seeing as the manual states that there should be spacers, it makes me wonder. the manual is silent on the allowable play. (PS,I hate shims). My logic tells me that the endplay should be at a minimum.
Any advice will be appreciated.