Rotor Repair, Pole Rebuilding & Generator Refurbishment
Restoring Performance. Extending Service Life.
Our dedicated Rotor Pole Center is one of the few facilities in the western United States built specifically for salient pole rebuilding and rotor repair — strip, re-laminate, recoil, and re-insulate hydro and synchronous machine poles, plus full generator refurbishment from our Magna and Draper, Utah shops.
What our team handles
in-house.
Rotor Inspections
Visual, electrical, and dimensional inspection of complete rotors with documented condition reports.
Rotor Rewinds
Full rotor and field coil rewinds for hydro and synchronous machines, with VPI or upgraded insulation systems.
Pole Replacement
Manufacture and install replacement salient poles for legacy and current hydro generators.
Pole Insulation Repair
Strip, re-insulate, and re-test damaged pole insulation using modern Class F / Class H resin systems.
Pole Face Restoration
Machine, weld-repair, and re-profile pole faces to restore air gap and rotor geometry.
Retaining Ring Service
Inspection, NDT, removal, repair, and reinstallation of retaining rings on synchronous and turbo generators.
Collector & Connection Rings
Collector ring repair, slip ring resurfacing, and connection ring repair or replacement.
Rotor Balancing
Low- and high-speed dynamic balancing for rotors, armatures, and complete generator rotors.
Rotor Refurbishment
Complete rotor refurbishment including amortisseur (damper) winding repair, hub work, and full reassembly.
Testing & QA
Surge, hi-pot, RSO, and impedance testing on every pole and rotor before shipment, with documented test reports.
SERVING SALT LAKE CITY, MAGNA,
AND THE INTERMOUNTAIN WEST.
Based in Magna and Bluffdale, Utah, our sidewinders rotor pole services team dispatches across the state and region. On-site service and 24/7 emergency response available.
Utah Cities Served
- Salt Lake City, UT
- Provo, UT
- Lindon, UT
- Orem, UT
- Lehi, UT
- Ogden, UT
- Sandy, UT
- West Valley City, UT
- Park City, UT
- Logan, UT
- St. George, UT
- Tooele, UT
- Vernal, UT
- Price, UT
Regional Coverage
- Utah
- Idaho
- Wyoming
- Nevada
- Colorado
- Arizona
Industries supported
Our Refurbishment Process
- STEP 01
Incoming Inspection
Full electrical testing (IR, winding resistance), mechanical inspection and documentation, material verification including coating evaluation and asbestos testing.
- STEP 02
Disassembly and Cleaning
Safe removal of coils and pole bodies, controlled insulation removal and abatement, bead blasting and manual finishing.
- STEP 03
Re-Insulation and Rewinding
Class F insulation systems, multi-layer Nomex, G11 structural components, controlled installation onto existing pole irons, option to reuse existing copper or fabricate new edge-wound coils.
- STEP 04
Pressing and Thermal Processing
Axial and radial pressing, induction heat cycling with controlled bake, continuous thermal monitoring with embedded RTDs.
- STEP 05
Electrical Testing
Surge, hi-pot, insulation resistance, and pole drop testing before, during, and after processing.
- STEP 06
Final Assembly and Finishing
Coil alignment and lead positioning, epoxy void filling, protective insulating coatings, final dimensional and visual inspection.
- STEP 07
Quality Assurance
Documented inspection and test records for every pole.
- STEP 08
Packaging and Logistics
Protective crating and coordinated shipment or on-site installation support.
Need service today?
Talk to a technician at our Magna, UT shop — emergency rebuilds, on-site testing, and field service across the Intermountain West.
Rotor Pulls, Planned and Executed with Precision
A 400-ton hydro rotor lifted from its stator pit — captured on-site and compressed into ten seconds of precision rigging. Sidewinders supports complex rotor removal and installation projects with the planning, field expertise, and technical coordination required for critical generator work. From rigging strategy and lift execution to inspections and return-to-service support, our team works alongside plant personnel and project partners to keep every stage safe, controlled, and on schedule
- Rotor
- 400 t
- Crew
- 07
- Duration
- 04:18:22
Rotor & pole rebuilding questions, answered.
Q.01What rotor repair and pole rebuilding work does the Rotor Pole Center handle?
+
Complete salient pole rebuilding — strip, re-laminate, recoil, and re-insulate hydro and synchronous machine poles to OEM or upgraded specifications. We also perform field coil winding, amortisseur (damper) winding repair, and complete generator refurbishment for vertical and horizontal machines.
Q.02Where is the Rotor Pole Center located?
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Our dedicated rotor pole shop operates from Sidewinders' Utah facilities in Magna and Draper. We are one of the few facilities in the western United States built specifically for salient pole rebuilding and rotor refurbishment.
Q.03Can you reverse-engineer field coils for legacy hydro machines?
+
Yes. We routinely manufacture replacement field coils, salient poles, and amortisseur components for legacy hydro and synchronous machines where OEM drawings or spares are no longer available.
Q.04What testing is performed on rebuilt poles before shipment?
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Every pole gets surge, hi-pot, RSO, and impedance testing before it leaves the shop. Test reports ship with the pole and we can witness customer or third-party inspection on request.
Q.05Do you offer insulation system upgrades during a rotor refurbishment?
+
Yes. Class F and Class H upgrades using modern resin systems, VPI processing, and upgraded turn and ground insulation are standard options during generator refurbishment.
Rebuild rotor poles with the only dedicated center in the West.
The Rotor Pole Center is hiring salient pole technicians, winders, and machinists. Specialized work, full benefits, and OEM-grade training on the West's only dedicated rotor pole shop floor.
Open Trade & Engineering Roles
- 01Motor & Generator Winders
- 02Field Service Technicians
- 03Machinists & Mechanical Techs
- 04Test Engineers
- 05Project Managers