Shigiya G30
- Shigiya G30
Shigiya G30
Oil Bearing OD Grinding Spindle
The common cause of failure to these spindles is contamination in the lubricating oil. The contamination wears the shaft and bearing which eventually causes a breakdown in the oil film layer that supports the shaft. The radial and axial force that the shaft is subjected to during the grinding process causes the shaft to contact the ID of the bearing. The next step is spindle failure.
We grind plate grind the shaft to bring it to size and have the proper surface finish. We rework the bearing ID and finish it with a hand scraping process. The hand scraping is done by our technician who has over 20 years experience with spindle bearing re-manufacture. This is an art form that should only be done by experienced experts. If it is done wrong permanent damage can be caused to the bearing ID. Replacement parts are not always available and re-manufacture of the bearings is costly.
- Studer Oil bearing
Studer Oil bearing
Our customer was having difficulty holding tolerances on their Studer grinder. They were able to narrow down the issue to the spindle assembly but they were not sure exactly what was causing the inconsistencies.
We had them ship both the oil bearing spindle and the ball bearing spindle that drives it. Our test run found that both spindles were out of acceptable tolerance levels and were probably both to blame for the problems. We rebuilt both spindles and test ran them as an assembly. Our extensive testing as an assembly insures our customer will get the optimum performance from their Spindles and their Studer grinder.
Heald Oil Bearing Spindle
- Heald Oil Bearing Spindle
A long standing customer of ours had a machine they were using to manufacture items for the food industry. The parts made needed to meet food grade standards and needed to remain uncontaminated from petroleum based substances. The machine was a 40 plus year old Cincinnati Horizontal grinder with bronze oil bearings. The bearings had been adjusted over the years to get the proper clearance but the adjustment had exceeded the designed wear point. This caused excessive radial play of the shaft causing the front oil seal to fail prematurely. This failure caused oil contamantion to the part they where manufacturing. The customer had repaired this spindle themselves in the past but new bronze bearings where not readily available. So the customer called us in to look at the dis-assemble spindle and give them some options to get the machine running again.
NTE modified the spindle head to accept precision angular contact bearings, with ” Grease for life lubrication “. Now there is no chance for oil contamination on the part, or operators forgetting to check oil flow and levels potentially causing spindle failure. Another benefit to the customer was the standardization of design incorporating readily available bearings and other consumable parts. This is key for them as they prefer to use their in house maintenance department for repairs. View Our Heald Spindle Repair Page Here.
Studer S20 Workhead
Studer S20 Workhead
This Studer S20 workhead arrived here seized. The shaft had scored the oil bearing and friction welded themselves together. We were able to grind plate grind the shaft and remanufacture the bearings to complete the repair. After the parts work was complete the spindle was assembled and the bearing clearance was adjusted. We test ran the spindle on our test stand and shipped the spindle with less than .00005″ of run out. We were able to repair this spindle for much less than the replacement cost quoted by the machine OEM.