Notice of Corporate Name Change - 

Adamant Namiki Precision Jewel Co., Ltd., changed its name to Orbray Co., Ltd., effective January 1, 2023.

A special website is available.

RC Servo Motor

RC servo motor pursued "high speed response" and "high output" with evolution of batteries.

RCサーボモーター

Brushed Motor

Rotor is made of a cup-shaped coreless winding coil. It features low inertia, and high speed response.

Brushless Motor

Stator is a coreless coil winding. No cogging in rotation, designed to run large current input, high output and high heat dissipation.

In RC servo applications, the mechanical time constant (the time it takes the servo to reach top speed from zero) is one of the most important specifications. Hence coreless motor, with its basket coiled rotor and faster response time, has conventionally been chosen over iron cored motor. RC servos require quick, repetitive left and right motion in a 60 degree angle, which means the motor is always running at the maximum current. This causes the coil to heat up and remain hot for the entire duration of use, limiting the lifespan. As such, RC servo is considered one of the hardest applications for DC brushed motors.
Orbray developed a coreless coiled brushless motor for RC applications that resolves both lifespan limit and the need for quick response for the first time in the RC industry.
As rechargeable batteries have evolved tremendously from Ni-Cd to high power Ni-MH, Li-Fe, and Li-Po, Orbray has developed a brushless DC motor for RC applications that is compatible with this type of high power performance. Along with this high power output, the motor also has the fastest mechanical time constant. We released the long-awaited brushless motor within the predetermined sizes of φ12mm x L15mm and φ17mm x L18mm, with a mechanical time constant faster than conventional coreless DC motors, and established a well-accepted, popular product in the field. Orbray's RC servo motor, in combination with servo makers' unique control systems, demonstrates high performance in torque and speed under all conditions, and achieves a precise operational feel.

Brushed Motor

RC Standard

Products φ[mm] Length
[mm]
Nominal
Voltage [V]
shaft
Φ
[mm]
Output
[W]
No load Stall Mechanical
time
constant
[ms]
Max
efficiency
[%]
Speed
[rpm]
Current
[mA]
Torque
[mNm]
Current
[mA]
CRS12-1503 12 15 7.4 1.0 4.3 37,100 63 4.41 2467 18.9 71
CRS17-1502 17 15 7.4 1.2 8.1 23,900 50 12.95 4353 19.8 80
CRS17-1801 17 18 7.4 1.2 10.1 25,500 60 15.08 5692 14.3 80
CRS17-2502 17 25 12.0 1.5 17.5 17,300 25 38.53 6000 8.0 87

RC High Speed Response

Products φ[mm] Length
[mm]
Nominal
Voltage [V]
shaft
Φ
[mm]
Output
[W]
No load Stall Mechanical
time
constant
[ms]
Max
efficiency
[%]
Speed
[rpm]
Current
[mA]
Torque
[mNm]
Current
[mA]
CRR12-1504 12 15 7.4 1.0 3.3 37,700 64 3.29 1897 15.0 66
CRR17-1502 17 15 7.4 1.2 5.6 23,800 50 8.90 3083 14.8 76
CRR17-1802 17 18 7.4 1.2 7.1 24,600 51 11.06 3895 11.6 79

Brushless Motor

RC Standard

Products φ[mm] Length
[mm]
Nominal
Voltage [V]
shaft
Φ
[mm]
Output
[W]
No load Stall Mechanical
time
constant
[ms]
Max
efficiency
[%]
Speed
[rpm]
Current
[mA]
Torque
[mNm]
Current
[mA]
BRS12-1503 12 15 7.4 1.0 4.7 35,500 143 5.07 2824 7.4 60
BRS17-1502 17 15 7.4 1.0 7.5 23,500 156 12.13 4327 5.2 63
BRS17-1802 17 18 7.4 1.5 7.7 27,300 114 10.80 4379 8.1 70

RC High Speed Response

Products φ[mm] Length
[mm]
Nominal
Voltage [V]
shaft
Φ
[mm]
Output
[W]
No load Stall Mechanical
time
constant
[ms]
Max
efficiency
[%]
Speed
[rpm]
Current
[mA]
Torque
[mNm]
Current
[mA]
BRT12-1502 12 15 7.4 1.0 7.4 36,600 178 7.68 4327 5.2 63
BRT17-18R8 17 18 7.4 1.5 15.4 25,500 249 23.09 8810 10.1 69

Contact


*Click here for detailed inquiries.
*If you cannot find the contact form, please click here.
☎

Mon-Fri 9:00-17:00 JST+81-3-5390-7620

✉

Online Contact

>> Sales Offices