REXNORD Q FRAME MOTORS ( QM series) ( COPPER & ALUMINIUM )

Rexnord QM Motors

Advantage: Equipped with self-lubricating sintered bushings or high-grade ball bearings.
Benefit: These motors are designed for “life-long lubrication.” Once installed in a supermarket refrigerator or an air dryer, they can run for years without requiring oiling or maintenance, significantly reducing service costs.

Advantage: The QM series follows the industry-standard “Q-frame” footprint.¹⁰
Benefit: It is a plug-and-play replacement for almost any other major brand (like EBM-Papst or Elco). This makes it the preferred choice for service technicians who need a reliable motor that will fit any bracket in the field.

Advantage: IP42 to IP55 ratings and die-cast construction.
Benefit: It handles the high-moisture/condensate environments found in evaporators and the high-heat environments of condenser coils without electrical failure. It’s built to survive where cheaper plastic motors would warp or short out.

Advantage: Optimized shaded-pole winding configuration.
Benefit: Ensures the fan starts instantly, even if there is slight ice buildup on the blades or high static pressure in the ducting. This prevents “stalled motor” scenarios that can lead to compressor failure in refrigeration systems.

Category: MOTORS Brand: rexnord

Housing: The motor body is made of Aluminium Die-Cast Alloy, which provides excellent structural rigidity and acts as a natural heat sink to keep the motor cool during continuous operation.
Motor Design: These are Single Phase, 4-Pole Shaded Pole Motors. This design is favored for its simplicity, as it requires no capacitors to start, making it highly reliable in harsh environments.
Bearing Systems: * Sleeve Bearing: Uses self-lubricating sintered bushings (standard for vertical mounting).
- Ball Bearing: Available for high-temperature or horizontal mounting where reduced friction and longer life are required.
Mounting Versatility: Known as “Universal Mount” motors, they feature multiple mounting points (2 legs, 4 legs, or 4-bolt “clamp” patterns) and sometimes a double-shaft option to drive two fans simultaneously.

Power Output: Ranges from $5\text{ W}$ to $34\text{ W}$ (common models include $10\text{ W}$ , $16\text{ W}$ , and $25\text{ W}$ variants).
Operating Voltage: Standard $230\text{V}$ AC ( $50/60\text{ Hz}$ ); also available in $115\text{V}$ versions for international markets.
Protection: * Impedance Protected: For lower wattage motors (prevents burnout if the fan is stalled).
- Thermally Protected: For higher wattage models to prevent overheating.
Insulation: Class B insulation is standard, rated for ambient temperatures between $-40^{\circ}\text{C}$ and $+40^{\circ}\text{C}$ .

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