Magnet Chuck Repair
Dura Magnetics services permanent magnet and electromagnetic work-holding chucks of most western chuck manufacturers. Repair of your existing equipment is usually a fraction of the cost of a new replacement.
Products Serviced
- Round and Rectangular chucks for grinding applications
- Round lathe chucks.
- Coarse or standard pole and fine pole chucks
- Electromagnetic Chucks
- Chuck Controls
Permanent Magnet Chucks
Most permanent magnet chucks do not have a catastrophic failure. Permanent magnet chucks gradually degrade over time. This degradation is evident in reduced holding power or the inability to turn the chuck fully "On" or fully "Off". These conditions are usually very repairable and have only a moderate cost. This condition will worsen with time and use, until the chuck is un-repairable. Consider a repair of your chuck while it can still be repaired.
Below is Dura's standard repair procedure for permanent chucks in the degraded operating condition. A quote based on chuck style and size is available by telephone, fax, or email. Please contact a Dura Team member for an initial quote.
1) *Disassemble and Inspect
2) Contact customer with the cost to repair if the repair exceeds the initial contact quote.
3) Clean all chuck elements.
4) Replace or repair broken parts.
5) Grind all internal magnetic elements of the chuck.
6) Lubricate and reassemble.
7) Finish grind working face and the mounting side of the chuck housing.
8) Re-magnetize.
*During the inspection phase several conditions may be observed. The customer will be contacted and informed for each condition listed below.
- The chuck repair exceeds the new replacement chuck cost. (This condition is usually due to excessive internal housing damage.)
- The labor for the repair is beyond the original quoted cost.
- A non-standard part is required, such as a gear or bushing that will have to be special made or ordered.
Electromagnetic Chuck or Chuck Control
Most electromagnetic chucks will fail by either developing a "dead area" on the chuck or failing altogether. These conditions are caused by the internal coils failing from various conditions from coolant intrusion to excessive heating.
An electromagnetic chuck's holding power relies on induced poles developed in the chuck's top-plate. The induced poles interact with the work-piece and create the holding force. The poles are developed by the coils lying under the top-plate. Any interruption to the current in the coils will result in a failure of the chuck. Typical failures occur when one or all of the coils are shorted or open. Unlike permanent magnet chucks, electromagnetic chucks will fail in the "Off" condition and the work-piece will be thrown.
It is imperative that a weak or failing electromagnetic chucks or suspect controls be removed from service. Dura Magnetics provides the testing, evaluation, and repair services required to keep your work holding application safe and operational.
Below is Dura's standard repair procedure for Electromagnetic chucks in the failed or failing condition. A quote based on chuck style and size is available by telephone, fax, or email. Please contact a Dura Team member for an initial quote.
1) *Disassemble and Inspect
2) Contact customer with the cost to repair if the repair exceeds the initial contact quote.
3) Clean all chuck elements.
4) Replace or repair coils and leads.
5) Finish grind working face and the mounting side of the chuck housing.
*During the inspection phase several conditions may be observed. The customer will be contacted and informed for each condition listed below.
- The chuck repair exceeds the new replacement chuck cost. (This condition is usually due to excessive coil failure.)
- The labor for the repair is beyond the original quoted cost.
Electromagnet Chuck Controls
Repair of chuck controls are quoted on a case by case basis. Please contact a Dura team member to discuss your control requirements.