Holmes Hobbies CrawlMaster PRO 550 12T Brushed Motor

When you need a quality brushed motor, there is no finer than a Pro Handwound from Holmes!  The CrawlMaster series offers unequaled startup control and sets the gold standard for Rock Crawling motors. 

FEATURES:

550 size provides extra torque and power
Hand wound at Holmes Hobbies for highest performance
5 slot armature maximizes smoothness, efficiency, and offers unequaled 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

Specification:

12 turn five slot / 20,000 RPM @12v (estimated) @ 12 degrees timing
216 grams 
36mm OD x 60mm 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