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Holmes Hobbies TorqueMaster Pro 21T 550 Brushed Motor

USD 109.99

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Tags: Holmes Hobbies 550 Brushed Motor Rock Crawler Motor


This is Holmes Hobbies TorqueMaster Pro 21T 550 Brushed Motor  When you need a quality brushed motor, there is no finer than a Pro Handwound from Holmes!  The TorqueMaster series offers fantasic torque with extremely smooth startup for a well rounded motor for your Rock Crawler.


  • For: RC Crawler

  • Material: Metal

  • Color: Black

  • 550 size provides extra torque and power

  • Hand wound at Holmes Hobbies for highest performance

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

  • Epoxy balanced armature ensures maximum torque, efficiency, and startup smoothness 

  • Silver brazed commutator connections allow higher tempurature operation

  • Vacuum dipped armatures withstand high RPMs without failure

  • 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


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

  • 216 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


  • Holmes Hobbies TorqueMaster Pro 21T 550 Brushed Motor (1 pc)

Rcmart Description
Brand Holmes Hobbies
Motor Size 550 Size
Motor Turn 21T
Motor Type Brushed

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