Shin-Etsu G-501 Silicone Grease for Plastic Gear & Blower Bearing Lubrication

In household appliances (e.g. air conditioner blowers, air purifiers) and office equipment (e.g. printers, copiers), moving parts such as POM/ABS plastic gears and small DC motor bearings require lubrication to reduce friction and noise. Conventional petroleum-based or general silicone greases may cause stress cracking / crazing​ on engineering plastics such as Polycarbonate (PC), Polyacetal (POM / Delrin®), and ABS — leading to premature part failure.

Engineers selected Shin-Etsu G-501, a one-component white silicone grease specially formulated for plastic-to-plastic and plastic-to-metal interfaces.

Plastic-safe: Significantly less likely to cause stress cracking on PC, POM, ABS vs. conventional lubricants.

Low volatility & low bleed: 0.10% volatile content & 2.5% oil separation ensure long-term stability without drying out or contaminating nearby parts.

Noise reduction: Smooth film lowers running noise of meshing plastic gears and blower shaft bearings.

Wide temp. range: Remains pliable at -50°C and resists breakdown up to +150°C — suitable for appliances in variable ambient conditions.

• Blower / Fan Bearings​ — Cross-flow fan motor bearings in A/C units & air purifiers (plastic or sintered metal sleeve bearings).
• Office Equipment Gears​ — Printer / copier POM drive gear trains where quiet, crack-free operation is required.
• Small Appliance Mechanisms​ — Sweeping robot gearbox, electric toothbrush reduction gear, automotive window regulator plastic gears

• Replaced mineral-oil-based grease → No stress cracking observed on POM/ABS parts​ after accelerated aging tests.
• Measurable reduction in gear mesh noise​ (subjective and instrumented) compared to unlubricated or general silicone-greased assemblies.