Hello! Please contact our team so we can discuss option for your spindle. You can email us at info@astspindles.com - look forward to hearing from you soon.

Josh, we'd like the opportunity to discuss options for your spindle. Please give us a call at 833-854-2579 or send an email to bhodge@astspindles.com - Thanks!

To better balance the preloads. So you don't have much of a weak link. During our spindle repairs, we assess each spindle and make decisions based on the usage and choose components to optimize its performance.

I've rebuilt a spindle with two pairs of angular contact ball bearings, one pair at each end of the spindle. I also thought hmmm, I can save some money and simply use two radial bearings on the inboard end of the spindle. Doing this would impair the stiffness and, in all likelihood the accuracy, of the spindle. Radial bearings are manufactured with some radial clearance and this would make the spindle assembly less stiff. To purchase a pair of radial bearings without radial clearance I found next to impossible or cost prohibitive. Also, the spindle assembly was designed such that tightening the inboard spindle nut pre-loaded all 4 bearings appropriately. I did have the 4 bearing spacers reground so that each pair of spacers was parallel to millionths of an inch and the same thickness. The result was a beautifully running spindle. After all this I had to re-machine the spindle nose taper because it still ran out almost .001". While hardened it was still machinable with a tungsten carbide insert. The set-up took a little doing to get the taper correct, but all turned out well, machining the taper in place on its own bearings.