Catastrophic bearing failure was the main cause of this spindle malfunction Continue reading to learn how Northland Tool performed this repair and converted a Weiss GHK 176239 spindle from grease-injected to permanent grease lubrication……Read More
Kellenberger 1000U Spindle Repair
The Kellenberger 1000U is a cylindrical universal grinder equipped with a belt-driven, grease-lubricated spindle that operates at 1,500/1,700/2,100 rpm. This machine is a highly capable precision grinder known as a workhorse throughout the machining industry. Read the following case study to learn how we solved this customer’s spindle repair challenge.
When disassembling the spindle, our service technician noted that all exterior and interior cavities were heavily contaminated with coolant. In both the workhead spindle and its drive pulley, the bearings were also heavily contaminated. Bearings on the idler shaft were over-lubricated with blue marine grease, which is not recommended for this application. The DC drive motor bearings were very noisy when rotated by hand, and the motor shaft had radial play. The larger motor bearing was full of sludge and the smaller bearing failed from complete loss of lubrication. The magnetic motor housing had cracks in a through hole in one of the stator plates, which rendered the DC drive motor unserviceable.
The following actions were performed for this Kellenberger 1000U spindle repair:
- Replace all bearings (OEM spindle, pulley, and idler shaft)
- Replace all seals, o-rings, gasket, belts, and assembly screws
- Recommended replacement of DC drive motor. Customer opted to source and install themselves
After adjusting bearing preload, reassembly of all components, and undergoing break-in and testing procedures, this spindle passed our final quality inspection before being returned to our customer with a 1-year warranty.
Does your spindle need repair? GET A QUOTE TODAY
Studer Grinder Spindle Repair
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… [...]
Fortuna FIV60R250.44 Spindle Repair
This Fortuna FIV60R250.44 spindle was sent to us with our customer indicating that the spindle was heating up and was hard to turn during operation. … [...]
Elb Grinder Spindle Repair
This Elb Grinder spindle was previously disassembled before arriving at Northland Tool and Electronics. The customer provided used and new front and rear bearings. The… [...]
Walter DB112005 Spindle Repair
Our customer, a large tooling manufacturer, was experiencing a loud, roaring noise and poor part finish with this double-ended grinding spindle. Our evaluation of the… [...]