Holmes Hobbies TorqueMaster Pro 550 Brushed Electric Motor (21T)

Read Reviews
Write a Review
Holmes Hobbies TorqueMaster Pro 550 Brushed Electric Motor (21T)
Back Order Now
You may back order this item and it will ship when it arrives.
FREE Shipping Eligible! Learn More
Price: $109.99

Please Log in to receive a notification when this item arrives in stock.

Save In List
This item earns up to 110 VIP Reward Points Learn More
The Holmes Hobbies TorqueMaster Pro 550 Brushed Electric Motor offers fantastic torque with extremely smooth startup to create a well rounded motor for your Rock Crawler.

Features:
  • 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 temperature operation
  • Vacuum dipped armatures withstand high RPM's 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
Specification:
Turn: 21 turn three slot
RPM: 27,250 @12v & 12 degrees timing
Weight: 216 grams
Size: 36mm OD x 60 length (not including shaft)
Shaft: 1/8" D shaft
Mounting Pattern: 1" (25.4mm) for M3 screws
Input Voltage: 6-9 cell nimh, 2-3s Lithium
Rotor: 23mm OD x 29mm

This product was added to our catalog on March 23, 2021

Matthew H
Verified Owner
Friday, Jul 1 2022 (about 2 years ago)
Holmes Hobbies TorqueMaster Pro 550 Brushed Electric Motor (21T)
Great Motor this was a replacement motor for my Custom TRX-4 trax build. The stock Titan 21t motor would get very hot. Comparing the two the Holmes Hobbies is noticeably better having a lot more bottom end torque that feels a lot more smoother managing throttle over changing obstacle.