Motor & Generator Rewind/Re-build

  • Keystone is equipped to handle large motor and generator rewinding with horsepowers up through 30,000 hp and voltages to 13,800 with all applicable electrical testing to conform to Nema and Easa standards both A.C. and D.C.
  • Full load testing is available to 1250 hp, 4160 volts A.C. and 600 volts, 1200 amps D.C.
  • All rewinds of 4160 and lower are VPI treated in Class “H” epoxy resin.
  • Keystone offers brushless conversions of older style brush-type synchronous machines and has presently successfully converted in excess of 40 machines.
  • Keystone offers turnkey services for removal, transportation, rebuilding, installation, laser alignment and start-up of motors, generators, pumps and other various equipment.
  • Keystone Electric owns a fleet of trucks capable of hauling from hundreds of pounds to 100,000 lbs. Transportation and permitting are a part of normal operations.

Mechanical Rebuilding Services

Turning
We are equipped to turn small and large parts in both prototype and small production quantities. We have modern manual engine lathes, all of which can be adapted to air hydraulic tracer. Our largest lathe can swing 144” and it has a length of 30 feet between centers. Milling and grinding attachments are available.

Boring & Milling
Our horizontal boring mills will handle most sizes and shapes required by heavy industry. The largest mill has a 5” bar and a right angle milling head attachment. The table size is 5’ x 10’ and machining window is X109”x Y84”.

Broaching/Keyway Cutting
We have broaching equipment for cutting external and internal splines, keyways and other close tolerance profiles.

Grinding
Surface and cylindrical grinders are available to provide the close tolerance you require and proper surface finish.Cylindrical done in all size lathes with 12” dia. tool post grinder. Work Capacity equals max lathe capacity. Blanchard surface grinding to 45” dia. X 18” high.

Shapes
Plasma and oxy/ace burning. Computer generated special shapes – gussets/clevis/sprockets and custom shapes from your drawings /CAD files from SS-copper-bronze-steel, aluminum, on a 5’ x 10’ table.

Welding
All types weld repair, weld overlay to resurface. Manufacture of all machine components. MIG-TIG-Stick – All metals – special process heat and post heat treating.

Fabrications
We are equipped to make weldments of all types – machine bases – pedestals – structural members – machine parts – special shafting for crushers, hammer mills, gear boxes and housings.

Additional Services Offsite
Gear manufacture, Splines, Nickel/Copper/Silver/Chrome Plating, Roll Grinding, Large Surface Grinding, and Heat Treating

Other Services

Dynamic balancing in our shop or at your facility

Complete facilities in our shop for dynamic balancing. Unlimited diameters and length. Up to 60,000 lbs. capacity. On-site with SKF data logger/spectrum analyzer.

Alignment

Precision laser and computer techniques for alignment of any rotating equipment including hot target pre-set analysis.

Machinery Building

We rebuild machines for all types of equipment – presses, tube mills, process machinery, motors, generators, horizontal pumps of all types, blowers, fans, compressors, vertical pumps of all types and configurations, clutches, speed reducers and other rotating machinery. We will custom build electroplating rolls and high current rotary transfer heads with 36,000 amp capacity.

Crane

Our repair center is fully equipped with material handling equipment. Our largest crane has a capacity of 30 tons.

Machinery Removal, Transportation and Installation Services

Keystone offers turnkey services for removal, transportation, rebuilding, installation, laser alignment and start-up of motors, generators, pumps, blowers, fans, compressors and all other industrial rotating machinery.

Keystone Electric owns a fleet of trucks capable of hauling from hundreds of pounds to 100,000 lbs. Transportation and permitting are a part of normal operations.

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