What Lubrication Maintenance Do 45MM Tubular Motors Require Annually?

In industrial and residential automation systems, 45mm tubular motors are indispensable components for driving roller shutters, awnings, and other motorized fixtures. These compact yet powerful devices operate under significant mechanical stress, making annual lubrication maintenance critical to ensure longevity, efficiency, and quiet operation. Neglecting this routine care can lead to premature wear, increased energy consumption, and costly repairs. 
Why Lubrication Matters
Tubular motors rely on internal gears, bearings, and telescoping tubes to convert rotational motion into linear force. Over time, friction between metal components degrades surfaces, generates heat, and increases operational noise. Lubricants act as protective barriers, reducing wear and dissipating heat. For 45mm models, which often handle medium-to-heavy loads, inadequate lubrication accelerates failure risks. Annual maintenance ensures smooth motion, minimizes downtime, and aligns with manufacturer warranties.
Key Lubrication Points
Gear Assembly
The planetary or spur gears inside the motor require high-viscosity grease to withstand torque. Use lithium-based grease (NLGI Grade 2) for its thermal stability and water resistance. Apply a thin layer to gear teeth using a precision applicator, avoiding over-greasing to prevent debris accumulation.
Telescoping Tube
The outer tube’s sliding mechanism must glide effortlessly. Silicone-based lubricants are ideal here, as they resist dust adhesion and maintain flexibility in temperature fluctuations. Spray a small amount along the tube’s inner surface and cycle the motor to distribute evenly.
Bearings and Bushings
Motor bearings sustain radial loads during rotation. A synthetic oil with anti-corrosion additives (ISO VG 32 or similar) protects against moisture ingress. For sealed bearings, a single drop at the seal edge suffices; open bearings may need a light coating.
Limit Switch Mechanism
Though not directly part of the drive system, limit switches control motor stopping points. A dielectric grease on electrical contacts prevents oxidation, ensuring reliable signal transmission.
Step-by-Step Annual Maintenance
Power Down and Disassemble: Always disconnect power and remove the motor from its housing. Follow the manufacturer’s disassembly guide to access internal components safely.
Clean Before Lubricating: Use a lint-free cloth and isopropyl alcohol to remove old grease, metal particles, and contaminants. Compressed air can clear hard-to-reach areas.
Apply Lubricants Sparingly: Over-lubrication attracts dirt and causes drag. Follow the “less is more” principle, reapplying only where metal-to-metal contact occurs.
Test and Reassemble: Reinstall the motor and run multiple cycles to validate smooth operation. Listen for unusual noises, which may indicate uneven lubrication.