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CRS/CRR12-15

Product catalog summary

Orbray DC Coreless Motor Series for RC and Robotics

Product Overview

This document presents specifications and technical details for Orbray's DC coreless motor series, designed primarily for remote control (RC) and robotic applications. The motors feature precious metal brushes and sintered sleeve bearings, optimized for performance and durability.

Key Specifications

Parameter	Description	CRS12-1503 (7.4V)	CRR12-1504 (7.4V)
Nominal Voltage	Rated operating voltage	7.4 V	7.4 V
No Load Speed	Motor speed without load	37,100 rpm	37,700 rpm
No Load Current	Current draw without load	63 mA	64 mA
Stall Torque	Maximum torque at stall	4.41 mNm	3.29 mNm
Stall Current	Current at stall	2.4 A	1.9 A
Output Power	Power output at rated conditions	4.3 W	3.3 W
Max Efficiency	Peak efficiency percentage	70.5%	66.4%
Terminal Resistance	Electrical resistance at terminals	3.0 Ω	3.9 Ω
Friction Torque	Torque loss due to friction	0.117 mNm	0.117 mNm
Back-EMF Constant	Voltage constant (mV/rpm)	0.195	0.189
Torque Constant	Torque per ampere (mNm/A)	1.86	1.81
Slope of N-T Curve	Speed to torque gradient (rpm/mNm)	8394	11449
Mechanical Time Constant	Response time (ms)	18.9 ms	15.0 ms

Mechanical and Operational Details

Shaft Axial Play: 0.03 to 0.3 mm
Operating Temperature Range: -20°C to +60°C
Number of Commutator Segments: 5
Bearing Type: Sintered sleeve bearing
Weight: Approximately 9 grams
Note: Reduction gears cannot be attached to these motor models.

Additional Notes

For prototype development, customers are requested to provide the corresponding pinion gear or specify pinion parameters in advance to ensure compatibility with the shaft diameter.

Specifications are subject to change without prior notice.

Contact Information

Orbray Co., Ltd.
3-8-22 Shinden, Adachi-ku, Tokyo 123-8511, Japan
Tel: +81-3-5390-7620
Website: https://orbray.com/en/
Email: [email protected]

Catalog excerpts

NOWONOOUIN! SSINISNG SMA NHIOAHHW DC CORELESS MOTOR SERIES FOR RC AND ROBOT 5 Stall current 6 Output power 7 Max. efficiency 8 Terminal resistance 9 Friction torque 10 Back-EMF constant 11 Torque constant 12 Slope of N-T curve 13 Mechanical time constant Other spec hich) myHNYd Orbray Co., Ltd. 3-8-22 Shinden, Adachi-ku, Tokyo 123-8511 Japan Specifications are subject to change without notice. Sintered sleeve ※Reduction gear cannot be attached to this model. Mechanical data Dimension in mm Please provide corresponding pinion gear or specify pinion parameters for sample making. 試作時にはシャフト径に合うピニオンを提供頂くかビニオン

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*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.

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