The timing of electric motor repairdepends on the type of fault and the amount of work: current repairs take 1-2 days, winding rewinding - 3-7 days, major repairs - from 7 to 14 working days. In this article, Elektromotors engineers in Tashkent analyze in detail what determines these deadlines, what factors can increase them, and how the customer can receive a finished unit faster without losing quality.
Repair time by type of work: summary table
In production, every downtime shift is a loss, so the customer’s first question sounds the same: “How long should I wait?” We have compiled a table of typical deadlines based on statistics from our workshop over the past three years. These are the ranges that cover 90% of orders for asynchronous motors with power up to 250 kW.
| Type of work | Duration (working days) | What is included |
|---|---|---|
| Routine repair | 1–2 days | Cleaning, purging, lubricant replacement, contact pulling, checking insulation resistance |
| Replacement of bearings | 1–3 days | Disassembly, removal of old bearings, installation of new ones, alignment, assembly |
| Rewinding the stator | 3–7 days | Removing the old winding, circuit calculation, winding, impregnation, drying, testing |
| Rewinding of phase-type rotor | 4–8 days | Dismantling of rotor winding, winding, balancing, control tests |
| Major repairs | 7–14 days | Complete disassembly, rewinding, replacement of bearings, balancing, restoration of the shaft and housing, running in |
| Urgent repairs (24/7) | from 8 hours | Unscheduled work in continuous shift mode |
The indicated ranges are valid for standard engines. If we are talking about high-voltage machines from 6 kV or units with a power of over 400 kW, the period can increase by 30–50% - due to a larger volume of winding wire, long-term impregnation and drying.
What affects the repair time of an electric motor
Time in the workshop is not only the work of the winder. The final deadline is influenced by a chain of several parameters, each of which can extend or shorten the process.
- Motor power and dimensions. A 7.5 kW machine is rewound in two days; 160 kW engine - at least five. The greater the mass of copper, the longer the winding and impregnation.
- Availability of spare parts and materials. SKF, FAG, NSK bearings for the AIR standard series are in stock. Special bearings for crane and traction motors can be ordered within 2–5 days.
- Queue in the workshop. During the peak season (autumn - preparation for heating, spring - start of irrigation), the queue lengthens by 1-3 days. An urgent order removes this factor.
- Complexity of the defect. If, in addition to the winding, the stator iron package, shaft or bearing shields are damaged, restoration work is added.
- Complete technical documentation. When the manufacturer's nameplate is lost, the engineer needs time to calculate winding data from wire samples and slot geometry.
- Drying and impregnation. High-quality vacuum-pressure impregnation takes 12–24 hours; This stage cannot be accelerated without losing the insulation resource.
Experienced technical directors in Tashkent know: trying to complete a 110 kW overhaul within 24 hours almost always means a compromise on quality. We do not offer such compromises and honestly give realistic deadlines.
How to speed up engine repairs without losing quality
There are several practical techniques that our regular customers use to get a finished unit 20-40% faster.
- Carry out diagnostics in advance. Diagnostics of electric motors on operating equipment (vibration, thermal imager, insulation resistance measurement) allows you to order spare parts BEFORE stopping.
- Bring the motor complete. The pulleys, couplings, and terminal box must be in place - otherwise assembly and testing will be delayed.
- Pass over the passport and connection diagram. This saves the engineer 4-8 hours to restore the winding data.
- Agree on the defect report on the day of receipt. We prepare it 2-4 hours after disassembly; Quick confirmation by the customer triggers the purchase of materials on the same day.
- Use a backup engine.On critical lines, keep a replacement unit - this relieves temporary pressure and allows repairs to be carried out without haste.
- Order urgent repair for emergencies. The workshop operates in two shifts, materials are issued out of turn.
Urgent electric motor repair 24/7 in Tashkent
For emergency production stops, we have provided an emergency repair mode. The application is accepted around the clock, the engine is picked up from the customer’s site within 2–4 hours in Tashkent, work begins immediately after it arrives at the workshop. For routine repairs and replacement of bearings, this gives a finished product in 8–12 hours; on stator rewinding 30 kW - in 24–36 hours.
Urgent mode is charged at a premium of 30–50% to the base cost, which pays off within the first shift of line operation. According to our data, downtime of a 75 kW conveyor motor in the food industry costs tens of times more than the emergency surcharge.
Deadlines for specific types of equipment
Different types of engines have their own specifics of maintenance, and the terms differ markedly from average.
- Crane motors MTH, MTF. Repair of crane electric motors requires mandatory rewinding of the phase rotor and checking the slip rings - the time frame is 5–9 days.
- Elevator motors. Repair of elevator motors includes mandatory balancing and checking the brake system - 4–8 days.
- Asynchronous AIR, 4A. The fastest in work - repair of asynchronous electric motors up to 30 kW takes 3-5 days.
- High-voltage motors 6 and 10 kV. The most complex - impregnation and testing take twice as long, the total period is 10–20 days.
- Transformers. Repair of transformers with replacement of windings - separate cycle, 7–21 days.
How we control deadlines at each stage
In our workshop in Tashkent, each order is assigned a number and a control card with stages: acceptance, defect detection, approval, repair, testing, shipment. The customer receives notifications about the status change. If at any stage there is a delay (for example, the supplier has delayed a bearing), we inform you in advance and offer an alternative - an analogue from another brand with equal characteristics.
In practice, 87% of orders leave the workshop on or before the deadline specified upon acceptance. The remaining 13% are cases where, after disassembly, hidden defects are revealed that require additional work to be agreed upon with the customer.
Conclusion and contacts
Actual repair time for an electric motor is determined by the volume of work, availability of materials and workload of the workshop. Current repairs take 1–2 days, rewinding takes up to a week, and major repairs take up to two. Urgent mode 24/7 reduces the time by half due to extraordinary processing. In order not to guess the timing, bring the engine for diagnostics or call an engineer to the site in Tashkent.
Do you need to repair your engine quickly? Contact Elektromotors engineers - we will give you an exact deadline after the inspection and offer an urgent mode if the downtime is critical. Find out more about workshop services or immediately write to contacts.