Orbray DC Coreless Motor Series CMS07-17 Overview

This document provides detailed technical specifications, mechanical data, and environmental parameters for the Orbray DC Coreless Motor Series CMS07-17, a precision motor featuring precious metal commutation and sintered sleeve bearings.

1. Electrical Specifications

• Nominal Voltage: 3.7 V (also variants at 7.4 V)
• No Load Speed: Approximately 20,200 to 24,000 rpm depending on model
• No Load Current: 10 to 19 mA
• Stall Torque: Around 0.84 to 0.94 mNm
• Stall Current: 283 to 571 mA
• Output Power: 0.5 W
• Maximum Efficiency: 65% to 67%
• Terminal Resistance: 6.48 to 26.12 Ω
• Rated Torque: 0.135 to 0.144 mNm
• Rated Speed: 17,100 to 18,600 rpm
• Rated Current: 54 to 104 mA
• Friction Torque: 0.03 mNm
• Back-EMF Constant: 0.177 to 0.322 mV/rpm
• Torque Constant: 1.69 to 3.07 mNm/A
• Slope of N-T Curve: 21,543 to 26,410 rpm/mNm
• Mechanical Time Constant: 6.8 to 7.5 ms
• Rotor Inertia: 0.03 g·cm²
• Maximum Torque: 0.28 to 0.31 mNm

2. Mechanical Data

• Shaft Radial Play: 0.05 mm
• Shaft Axial Play: 0.03 to 0.2 mm
• Maximum Shaft Radial Load: 0.3 N (measured 5 mm from flange)
• Maximum Shaft Axial Load: 0.1 N
• Maximum Shaft Axial Load at Standstill: 0.1 N
• Bearing Type: Sintered sleeve bearing
• Number of Segments: 5

3. Environmental and Operational Parameters

• Operating Temperature Range: 20°C to 60°C
• Maximum Coil Temperature: 80°C
• Weight: Approximately 3.5 g

4. Additional Features and Notes

• Precious metal commutation ensures reliable electrical contact and performance.
• Specifications are subject to change without notice.
• Dimensions and gear/encoder options are available; for example, Gear: SPG07, Encoder: EHM07-3B (details on page 31).
• Speed and torque characteristics are graphically represented, showing performance across operating ranges.

5. Manufacturer 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]