Question regarding Proxxon Upgrade

[Jack Sparrow]

I was wondering if someone could tell me if in the addition of thrust bearings to the PRoxxon MF70 if I can get away with just installing one thrust bearing on the lead screw on the handwheel side. Do I need one on the other side too or is it redundant?

 

[Corsair]

Since you have to take the lead screw shaft all the way out anyway, even if you only replace the one end at the handwheel, you might as well replace them all.
Here is a link to the original article that originally created ! Its huge help with great directions. Follow the directions and it will be easy to do.
Link to thread

 

[Jack Sparrow]

Since you have to take the lead screw shaft all the way out anyway, even if you only replace the one end at the handwheel, you might as well replace them all.
Here is a link to the original article that originally created ! Its huge help with great directions. Follow the directions and it will be easy to do.
Link to thread

thank you

 

[Jimsky]

Thanks, Jeff @Corsair, for pointing to the tutorial!

Since this might be of interest to others as well, not just Mark @Jack Sparrow, I thought I'd share my response here for everyone to see.

Technically speaking, Mark, you don't necessarily need thrust bearings on both sides. It depends on how the shaft is loaded and how the assembly is designed. One thrust bearing: Usually sufficient when axial force acts predominantly in one direction. It prevents the shaft from moving along its axis.

My recommendation: Yes, ideally install thrust bearings on both ends of each lead screw, on both the X and Y axes. However, there is an important distinction. Why? Each axis can experience axial forces in either direction:

• When you turn the handwheel clockwise, the lead screw pushes the table one way.
• When you reverse direction, the force reverses.
• Thrust bearings on both ends control axial movement in both directions.