Why You Should Always Stock a Spare Electric Motor
A maintenance manager in West Michigan called us in a rush because a motor failed on one of their main production lines. The motor itself was not the most expensive part of the problem — the real cost was that the line was sitting still.
The lesson: a spare electric motor can cost far less than one unexpected shutdown.
Electric motors run conveyors, pumps, fans, blowers, mixers, gear reducers, and production equipment. When a critical motor fails and there is no spare on the shelf, your team may have to wait on sourcing, shipping, repairs, or emergency freight.
Downtime adds up fast: Industry downtime can cost thousands of dollars per hour. In many plants, one shutdown can outweigh the cost of keeping a spare motor on the shelf.
Why Stocking a Spare Motor Matters
Faster Repairs
If the motor is already on the shelf, your maintenance team can replace it quickly instead of waiting days for a replacement.
Less Emergency Freight
Emergency shipping can add unnecessary cost. Stocking a spare helps avoid overnight freight when a motor fails.
Better Planning
Having a spare motor gives your team time to repair, rebuild, or replace the failed motor without panic buying.
Lower Downtime Risk
One critical motor can stop an entire process. A spare motor helps keep production moving.
Buy Electric Motors Online
Stocking a spare motor can help prevent costly downtime. Shop electric motors online with MDS of Michigan or send us your motor nameplate for help matching a replacement.
What Motor Information Should You Keep on File?
When building a spare motor list, record the motor part number, horsepower, RPM, voltage, phase, frame size, enclosure, mounting style, shaft size, and application.
Download the MDS Standard Motor Checklist
Not sure what information to collect from a motor nameplate? Download our Standard Motor Checklist to help identify horsepower, phase, voltage, hertz, RPM, frame size, mounting, enclosure, and environmental requirements.
Quick tip: The most important motors to stock are the ones that stop production, are hard to source, or have long lead times.
Spare Motor Checklist
| Motor Detail | Why It Matters |
|---|---|
| Horsepower / Kilowatts | Matches the power required for the application. Metric IEC motors may list power in kilowatts. |
| Single Phase or Three Phase | Ensures the motor matches the electrical supply in your facility. |
| Voltage & Hertz | Common U.S. ratings include 115V, 230V, 460V, and 575V at 60Hz. Overseas equipment may require 50Hz motors. |
| RPM | Keeps the driven equipment running at the correct speed. Common 60Hz speeds are around 900, 1800, and 3600 RPM. |
| Frame Size | Controls mounting dimensions and shaft height. NEMA and IEC frames are not the same. |
| Mounting | Confirms whether the motor is foot mount, C-face, no-foot, flange mount, or a special mounting style. |
| Enclosure | Helps match the motor to the environment. Common options include TEFC, ODP, and TENV. |
| Environmental Conditions | Washdown, severe duty, cold, heat, dust, moisture, and explosion-proof applications may require special motors. |
Need Help Building a Spare Motor List?
At MDS of Michigan, we help plants source electric motors and power transmission parts for conveyors, pumps, fans, reducers, and industrial equipment.
Send us your current motor part numbers, nameplate photos, or completed motor checklist, and we can help quote replacement motors or build a spare motor list for your maintenance team.
Quote Your Spare Electric Motors
Download the checklist, fill out what you can, and email it to sales@mdsofmi.com for a quote.
Interested in Net 30 terms? Let us know when you contact MDS of Michigan, and we can help you with the account setup process.
