Heald Redhead 413
Heald Redhead 413 Spindle Repair
A bearing manufacturer sent us a Heald Red Head belt driven 413 A-Frame style spindle. The customer wanted to increase the maximum speed capability of the Heald to decrease their machine downtime from changing out the ID spindle heads. They also wanted to increase they rigidity of the spindles used at 18,000 rpm. The existing bearing arraignment of the in the spindle had a maximum speed of 17,000. Our customer wanted to run his spindle at between 8,200 and 18,000 rpm. We replaced the steel bearings with ceramic bearings and implemented design improvements. We were able to increase the maximum speed to 21,000 rpm.
This is possible by insuring all the integral spindle precision parts were measured and gauged making sure they were at proper tolerances. This is critical when increasing the speed of a spindle. The spindle was then tested at the higher rpm, vibration analysis was performed and the top speed was calculated with the data accumulated. The customer received the Heald spindle and has stated the finish and accuracy it provides is far better than before the modification. They have increased productivity with the spindle and have requested ceramic bearings in any future Heald spindle rebuilds done by Northland Tool & Electronics.
Written by Sandy Smith
I can be contacted at ssmith@northlandtool.com or 1-800-774-6353
- GMN TSSV 100
GMN TSSV 100
60,000 rpm
ID Grinding spindle
Front bearing failure causing the inner race of the bearing to spin on the shaft.
Northland Tool ground plate ground the front bearing journal to OEM specifications. We then rebuilt the spindle in our clean room and test ran it at speed. The spindle was trim balanced at 60,00 rpm and run on our test stand duplicating the machines set up as much as possible.
- GMN HSX120
GMN HSX120
60,000 rpm
ID Grinding Spindle
Our customer has instituted a predictive maintenance program for their spindles at this facility. This spindles vibration characteristics exceeded the preset threshold during the last vibration testing route. Our customer pulled it from production and sent it to us for repair.
Because the spindle was removed from service before it suffered catastrophic bearing failure it only needed a “straight” repair. The cost savings from the repairs alone will give our customer a return on their predictive maintenance investment in less than one year!
- Heald Red Head 264049
Heald Red Head 264049
Never to old to be rebuilt. This spindle failed from what else but old age. We reconditioned the worn parts and rebuilt the spindle. With us bringing the tolerances up to date and the advances in bearing technology this spindle runs better now than it did brand new!!
- GMN TSI 80X250
GMN TSI 80X250
ID Grinding Spindle
This spindle had run out in the taper and the front housing was fretted/over sized.
We ground plate ground the front housing and were able to kiss grind the run out from the taper on our Kellenburger grinders. We then rebuilt the spindle, test ran and balanced it at speed.
- Okamoto OH-30G
Okamoto OH-30G
Rear bearing failure from high belt tension. As the customer increased their feed rates the load to the spindle increased. Coolant splashing on the belt and pulley surface and a worn belt caused the belt to slip. The quick fix was to tighten the belt. This solved the slip problem but eventually caused the rear bearings to fail. A new belt is always cheaper than a spindle repair.
- Heald Red Head 401
Heald Red Head 401
Belt driven
ID Grinding spindle
We fix this type of spindle for a variety of customers used in the manufacture of bearings, aerospace parts, automotive and tool and die to name a few.
Heald Redhead Modification
Heald Redhead Quill Change Upgrade
Our customers have asked us to help them overcome a design flaw on their older Heald Readhead spindles. To change the quill on their dovetail spindles was very difficult as there was no good way to hold the shaft captive while unthreading the quill. In this case the best solution was to manufacture a quill extension that gives them wrench flats to use during tooling changes. We have also manufactured replacement shafts with an updated design and modified the existing spindle to incorporate a locking pin. This design change has reduced the tooling change times, reduced damage to the spindle and made the operators job safer and easier.
