BMS-A921+, 34 grams digital coreless mini servo.

Application

Priority for 3D Airplane, Helicopter 550-Class Swashplate CCPM cyclic and Tail used & 1/12th EP On-Road Car

Specifications

Torque At 6.0V                           10.8 kg-cm / 150.0 oz-in

Torque At 7.4V                           13.3 kg-cm / 184.7 oz-in

Torque At 8.4V                           15.1 kg-cm / 209.7 oz-in

Speed At 6.0V 0.07 sec / 60°

Speed At 7.4V 0.06 sec / 60°

Speed At 8.4V 0.05 sec / 60°

Protection Mechanism

Soft Start Protection                 Soft start to a neutral position.

Locked Rotor Protection          Stall in 5 sec, output torque goes down.

Temperature Protection           Overheat 85 degrees C (185 degrees F), drive the protection mode and down 75 degrees C (167 degrees F) return to normal mode.

Power Supply

Operating Voltage Range         4.5V ~ 8.7V ( 4 ~ 6 Cell Ni-MH or 2S Li-Fe & HV Li-Poly Compatible )

Control Specification

Control System                           32-bits CPU Digital Calculator / AD 12-Bits Resolution ( 4096 Steps )

Frequency：Up to 333Hz & Neutral：1500us or 1520us

Dead Band Width                      0.001ms ( 1us )

Mechanical Specifications

Ball Bearing      Dual

Gear                   All Metal Gears

Motor                High-Efficiency Coreless Motor

Horn / Gear Spline                    25 Teeth

Physical Specifications

Dimension (mm)                        35.5 x 15 x 29 mm / 1.4 x 0.59 x 1.14 in

Weight (gram) 34.0 ± 1 grams / 1.19 oz