#110100051 Holmes Hobbies TorqueMaster Expert 550 Brushed Electric Motor (21T)

The Holmes Hobbies TorqueMaster Expert 550 Brushed Motor features the same quality construction as the hand wound Pro series motors, but with a machine wound armature for an affordable alternative.
 
Features:

• 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

Specifications:

• Armature: 21 turn three slot
• RPM: 27,250 RPM @12v @ 12 degrees timing
• Weight: 206 grams
• Diameter: 36mm OD x 60mm length (not including shaft)
• Shaft: 1/8" diameter D shaft
• Mounting Pattern: 1" (25.4mm) M3 screws
• Input Voltage: 6-9 cell nimh, 2-3s Lithium
• Rotor: 23mm OD x 29mm length