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

The Holmes Hobbies TorqueMaster Expert 550 Brushed Electric Motor combines a machine-wound armature with the construction features of the Holmes Hobbies Pro series motors. Its 550 size, 21-turn three-slot armature, and high-power FB12 ceramic wet magnets are designed to provide torque, efficiency, and smooth startup.

Features

• 550 size provides extra torque and power
• Machine-wound armature for affordability
• 5mm web 3 slot armature maximizes torque and efficiency while offering smooth startup
• Gold-plated copper brush hoods resist corrosion and provide low resistance
• Aluminum heatsinks help shed heat
• Filter PCB reduces EMF noise
• Brush damper reduces noise and arcing
• 1.4mm thick uninterrupted back iron can
• 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 long 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