Holmes Hobbies TorqueMaster Expert 550 21T Motor

When you need a quality brushed motor, look no further than the TorqueMaster Expert 550 from Holmes! The Expert series features the same quality construction as our handwound Pro motors, but with a machine wound armature for an affordable alternative.

21 turn three slot / 27,250 RPM @12v @ 12 degrees timing

206 grams

36mm OD x 60 length (not including shaft)

1/8" diameter D shaft

1" (25.4mm) mounting pattern for M3 screws

6-9 cell nimh, 2-3s Lithium

23mm OD x 29mm length rotor

Every brushed motor carries a 30 day warranty directly through Holmes Hobbies to cover manufacturing defects. Damage caused by improper gearing is not covered under warranty.

550 size provides extra torque and power

Machine wound for affordability

5mm web 3 slot armature- Maximizes torque, efficiency, and offers smooth startup

Gold-plated copper brush hoods to resist corrosion and provide lowest resistance

Aluminum heatsinks shed heat

Filter PCB reduces EMF noise

Brush damper reduces noise and arcing

Can – 1.4mm thick uninterrupted back iron

High-power FB12 ceramic wet magnets maximize torque and efficiency

Dual Japanese Ball bearings

Adjustable timing

Holmes XX springs for consistent drag brake

Holmes Soft Copper brushes for high torque and longest motor life

Broken in for immediate installation and use