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Did it chatter earlier? If not, I'd replace them in kind. Should keep your original alignment intact.
Dick Z
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I have some chatter in the z axis when it rapids. I suspect that the linear bearings are beginning to wear out. I want to replace them and was wondering after replacing the bearings what alignment issues am I going to run into and how do I correct them
Did it chatter earlier? If not, I'd replace them in kind. Should keep your original alignment intact.
Dick Z
DZASTR
didn't chatter before, now it only chatters during rapid negitive z movement.
Are all bearings made to the same dimentional specifications? for example, if I have a 1.5" linear rail are the bearings for this size rail standardized with respects to ID OD and length
No, bearings can differ between manufacturers. Different bearing materials require different clearances as well. A bearing bronze bushing is different than "Oilite" oil impregnated sintered bronze.
Even profile ball and roller bearing blocks can have different clearance or "pre-load".
If your bearings functioned properly earlier, why not replace the bushings. Consider them a replaceable wear item, a maintenance issue?
Dick Z
DZASTR
Could you please explain the bushing part. Are you saying that the z axis is supported by both bearings and bushings? I have never taking a z axis apart so I don’t know the components of it. I was looking at these: LINEAR BEARINGS | Frelon® Lined - Precision Series, Open Type
Both the ball/roller and bushings are bearings. Bushing type bearings are made of many different materials, Teflon, brass, bronze, graphite etc.
There are ball bushings, roller bushings and other rolling rather than sliding linear motion systems.
The bushing type sliding bearings have a greater potential for wear. The "precision" bushings you refer to have about .001" clearance without any wear on them.
The ball and roller types of sleeves have near zero clearance and do not wear as easily as the sliding bushings.
The sliding bushings are less costly, which is why they are often employed in less expensive equipment.
Help any?
Dick Z
DZASTR
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