This Kitamura My-Center Spindle has grease lubrication and is belt driven. This particular spindle runs at 10K rpm and in the photos, Spindle Repair Technician, Andy, is breaking down the spindle and taking incoming measurements, photos, and checking the spindle for damage, runout, etc. At the point I swung by to take some pictures of this spindle repair, Andy had found that the front bearings were worn and had a significant amount of contamination.
Kitamura Mycenter 2X Spindle Repair
This customer called and needed a spindle repair done within 5 days. We received the spindle and expedited the breakdown process. The rear roller bearing cage had failed causing the rolling elements to collide causing the spindle seizure. The Belleville washers for the drawbar were damaged and the taper was worn. The spindle repair was evaluated, quoted and approved within 24 hours. The shaft was kiss ground in our grinding department that specializes in spindle repair applications the same day the spindle was approved. Then the spindle went to our assembly area where the technician replaced the bearings and bellevilles. The technician adjusted preload, assembled and ran the spindle. Our quality control department inspected the spindle. The spindle repair was approved by the QC inspection process. The customer was very happy with our quick turn service and how we expedited everything through our facility.
Kitamura Transmission Repair
A Kitamura machine tool dealer we work closely with was called to pull a spindle from their customer’s machine and found that the cause of the problem was the transmission for the spindle. The dealer referred their customer to Northland Tool & Electronics and described the transmission to us. We discussed the problems they were having and determined that we could rebuild it. We received the transmission and found both external pulley shafts OD’s were very worn. This looseness caused damage to the shaft, drive keys and nut from fretting. The pulley shaft was ground; chrome plated and finish ground to spec. The pulleys were welded, machined for sleeve installation and a key way was cut in. The assembly technician replaced all of the bearings; seals, assembled checked for proper gear mess and shifting and test ran. Final quality control ran the transmission at the maximum rpm and it passed all tests. The transmission is back at the customers and the machine tool dealer says the machine is running fine.