Mori Seiki Spindle Repair
Recently Northland tool got in this 8,000rpm Mori Seiki spindle for repair. This particular model is used to make AC and DC motors. Seen here: PJ is assembling this Mori Seiki spindle. We GPG’d the front housing, and kiss ground (done in house to save you money) the face and the taper. All of the spindle repair process takes place here at Northland tool. View Our Mori Seiki Spindle Repair Page Here.
Our production manager, Lee, just picked up a new Harley Davidson this week. Here are some pictures:
This Guering Spindle had damaged rear threads. In these photos Dennis is indicating the line in preparation for the repair process.
Spindle Rebuilding and SNOW
The snow affects even spindle rebuilding. When we get hit with a snowstorm here in the New England area you wouldn’t think that rebuilding a spindle would come to a halt. Well it does. After getting about a foot of snow and heading to work and arriving late we get the announcement that our freight company would not be showing up. This means that certain parts will not be coming in and customers finished spindles will not be shipping out the door. Calling a customer and telling them the spindle rebuild will not ship because we did not receive the parts or because the freight company isn’t coming in is not acceptable. They don’t have the time to understand our problems, they have their own and hearing ours is not what they want. I recently had to tell a customer the rebuilt spindle was on a truck stuck in Indiana on the road. The highway was shut down and their spindle was not moving. They appreciated the update but were not happy about it being “stuck”. When we get a lot of snow we lose power. You cannot build and test run a spindle with out power. Kids are out of school when it snows. We sometimes have to stay home on a “snowday”. As you can see spindle rebuild does come to a halt with the weather. We now wait for the snow to melt and to see grass growing. If you have warm weather send it our way along with your spindle for rebuild.
Van Norman Regulating Wheel Repair
This spindle failed as a result of bearing contamination. This is the most common cause of failure for spindles.
We repaired this spindle with our standard repair process. We cleaned and inspected the overall dimensions. The bearings were replaced. We then adjusted the preload, balanced, assembled and broke in the spindle. The final step in our process is a thorough inspection by our quality control technician in our clean room.
This Pibo Multi Spindle Repair is a 4K RPM internal gear belt driven spindle. This spindle has a tap tool and is used to tap holes. We replaced the bearings, tested the HSK taper and shaft and rebuilt the spindle. This spindle has manual grippers.
Guering Spindle Repair
This Guering spindle came to us as a cartridge-less spindle, meaning only the shaft and bearings. The customer and OEM felt it was best to keep the housing in the machine. This enables them to change the shaft and bearings quickly to minimize downtime. This is not generally the best way to have you spindle properly rebuilt.
In many cases the spindle ages and the bearings start to fail. Fretting and corrosion can damage the bearing bore in the housing. Installing bearings into a damaged, out of tolerance housing will shorten the life of the spindle and generally you will still have the finish problems you had before.
Another issue is when the spindle is installed in the housing. It is difficult for the rebuilder to control what is going on with the customer’s end of the rebuild. Most of the time the bearings are opened to the environment and can get contaminated during the handling of the shaft. It is also very easy to overload the bearing and cause false brinneling of the bearings.
If you do decide to have your spindle repaired without sending in the housing, make sure you confirm your housing bores are within tolerance before you install a fresh set of expensive bearings. This will at least let you know where your problem may be and you can plan ahead for the next spindle failure.
This Mazak H-400N spindle repair runs at 10K RPM and has Cat 40 tooling. The customer needed their spindle rebuilt and the thermistor wires needed to be replaced. In these photos, the extended thermistor is pictured after it has been replaced. The spindle itself is mid way through the spindle repair and rebuild process.
This spindle is a heald OD grinder being run up on the test stand. Denton is explaining the specifics of the spindle. View Our Heald Page Here.
Custom made parts
This video is of the final grinding stages of the manufacturing of a bronze oil bearing for a Shigiya OD grinder. The parts from the OEM were cost prohibitive and had an extremely long lead time so it was determined that it was better for our customer to manufacture the part in our machining and grinding departments. Northland Tool and Electronics dedicates almost half of our floor space to the manufacturing of parts that are obsolete or need to be made in an expedited manner. (more…)