Responding to all damage symptoms! Reliable maintenance technology to restore motors and pumps.
We respond to all damage symptoms through coil rewinding and thermal spraying using our unique in-house technology. We cater to a wide range of equipment, including old machines, foreign products, DC motors, and high-voltage motors, and we prevent issues like seizure and insulation failure through regular inspections. We also handle disassembly, installation, and wiring work comprehensively. We can conduct completion tests (no-load tests) for large-capacity motors, providing solid support for safe operation while extending the lifespan of the equipment. 【Features】 ■ Maintenance is possible for DC, winding-type, and high-voltage motors. ■ We can service and repair old motors and foreign-made motors. ■ We can address various failures, including coil burnouts and damage to bearings and shafts! ■ Not only do we repair equipment, but we also extend its lifespan! ■ Comprehensive construction is possible, including disassembly, installation, and wiring work! *If you have any requests for maintenance or repair of motors and pumps, please feel free to contact us.
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basic information
■Rewinding (Re-coiling) Maintenance of Burned Coils ● Coils will be rewound if there is burning, grounding, decreased insulation resistance, or deterioration of insulating materials. ■Reconditioning of Worn Shaft and Sleeve Areas (Thermal Spraying, Bushing Processing, etc.) ● When wear occurs on shafts or sleeves, reconditioning will be performed using thermal spraying. ● When wear occurs on the housing of brackets, bushing processing will be applied. ■Repair of DC and Wound-Type Motors (Maintenance and Manufacturing of Commutators and Slip Rings) ● We offer maintenance of commutators for DC motors and slip rings for wound-type motors, as well as various manufacturing services. ■Insulation Reinforcement of Coils ● For maintenance brought to our factory, we propose insulation reinforcement through varnish impregnation as a basic maintenance menu. ■Motor and Pump Diagnostic Services ● We provide on-site diagnostic services for your motors. Based on various measurement and inspection results, we will suggest whether maintenance is necessary. ● We will diagnose all motors you own, so please utilize this for planning future maintenance strategies.
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Applications/Examples of results
For more details, please refer to the PDF document or feel free to contact us.
Detailed information
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■Overhaul of DC Motor for Press Machine ●Condition Before Maintenance Maintenance of the DC motor is essential, particularly for the commutator, but if it has not been maintained for a long time, the surface is often quite rough. In such cases, not only can there be poor rectification, but also intense sparking may occur. In this instance, signs of scoring and step wear were also observed. ●Maintenance Results (After) In the maintenance of the commutator, it is necessary to carefully perform the steps in the order of turning → undercutting → chamfering. This time, maintenance was carried out according to the prescribed flow, and you can see the before-and-after comparison in the photos. After that, the carbon brush fitting was done, followed by assembly. Although the schedule was tight, we also applied a varnish impregnation treatment, and the maintenance was completed smoothly, resulting in successful delivery.
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■Maintenance of Wound Rotor Motor (Metal Bearing Repair) ●Condition Before Maintenance It was confirmed that there was a large crack in the metal bearing. By the way, large motors or older models often use metal for the bearings. ●Maintenance Results (After) We performed metal regeneration through a replacement repair. After melting the metal in a melting pot, we carefully conducted the welding work on the bearing to seal the crack. Subsequently, we carried out additional metal turning work to restore it to its original shiny condition. Depending on the condition of the metal, it is possible for us to perform the replacement in-house for cracks like the one this time. The inside of the coil was also dirty, so after cleaning and drying, we applied insulation reinforcement through varnish impregnation treatment. After assembling the main body, we painted it, restoring it to a condition similar to new.
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■Maintenance of Cutter Motors for Offshore Construction Vessels ●Condition Before Maintenance/Repair (Before) The motor before repair was severely corroded overall, and the bracket cover, which was particularly corroded, had lost its original shape. Wear was also observed in the bearing housing of the load side bracket. Due to prolonged use at sea, the insulation values were also tending to be low. ●Results of Maintenance/Repair (After) We conducted inspections of each part and performed a complete overhaul. For the insulation reinforcement of the stator coil, we carried out cleaning and drying, followed by varnish impregnation treatment. We also processed the bush of the load side bracket and manufactured a new bracket cover, as well as repaired the corroded areas. After confirming that there were no abnormalities during the no-load power-on test, we proceeded with painting, and the repair was successfully completed.
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■Reconditioning of Pump Motor Shaft by Thermal Spraying ●Condition Before Maintenance Initially, it was planned to replace the bearings on-site, but upon disassembly, severe wear on the shaft and significant damage inside the stator were confirmed. Therefore, it was decided to bring the equipment back to the factory for a complete overhaul, including thermal spraying. ●Result of Maintenance The worn and thinned areas of the shaft were restored through thermal spraying, and processes such as cleaning, drying, varnish impregnation and finishing, and bearing replacement were completed successfully. On the day of delivery, an unexpected issue occurred when the spare motor (which had been used in place of the serviced motor during maintenance) also stopped. However, since it was the delivery day, we managed to minimize production loss.
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Company information
Since our establishment in 1949, we have been involved in the repair and maintenance of rotating machinery such as motors and pumps. Now, we are doing business not only within Iwate Prefecture but also with various customers in the Tohoku region. We can service a wide range of motors, including AC (low/high voltage), DC, wound types, and various gear motors, regardless of type, including older models and foreign-made ones. Of course, the same applies to pumps. In particular, there are now few companies in the Tohoku region that can rewind burned coils, but since our founding, we have continued to rewind coils and can handle various types of motors as mentioned above. Recently, it often takes a long time to receive new products, so please consider coil rewinding maintenance in case of burning troubles or insulation failures. We also accept coil manufacturing. We can also handle prototype coils for research and development purposes, so feel free to consult us. Additionally, we have thermal spraying equipment (for the regeneration of worn parts) and large no-load testing equipment (capable of handling large capacity motors), allowing us to provide comprehensive motor maintenance in-house. We also accept on-site maintenance. Furthermore, we are actively engaged in the development of photocatalytic technology using thermal spraying. For more details, please visit our website.