General Overview

This document provides detailed technical specifications and combination guidelines for the Orbray PRECISION GEARHEAD SERIES, specifically the SSG12 Spur Gearhead model.

1. General Specifications

• Housing Material: Metal
• Geartrain Material: Steel
• Recommended Maximum Input Speed: 8000 rpm
• Operating Temperature Range: -10 to +60 °C
• Backlash at No-Load per Stage: Specified but exact value not clearly stated
• Bearings on Output Shaft: Sintered sleeve bearings
• Maximum Shaft Radial Load: 3 N (measured 7 mm from flange)
• Maximum Shaft Axial Load: 1 N
• Maximum Shaft Press Fit Force: 20 N
• Shaft Radial Play: 0.03 mm
• Shaft Axial Play: 0.2 mm
• Maximum Allowable Torque (Continuous): 15 mNm (12 mNm for ratios 25:1 or less)
• Maximum Allowable Torque (Intermittent): 30 mNm

2. Gear Ratio and Performance Parameters

Note: Direction of rotation is indicated with symbols (#) representing clockwise or counterclockwise rotation.

3. Combination with Motors

The gearheads are designed to be combined with various Orbray motor models. The document lists total lengths (motor + gearhead) for different motor types and gear ratios:

• Coreless Motors CMS12 Series: Lengths range from 29 mm to 47.5 mm depending on model and gear ratio.
• Brushless Motors BMS12 Series: Lengths range from 29 mm to 39 mm depending on model and gear ratio.

Example: CMS12-1506 motor combined with SSG12 gearhead (length 16 mm) is denoted as CMS12-1506S16.

For non-standard gear ratios not listed, users are referred to an additional table on page 100.

4. Notes and Additional Information

• Dimensions marked with a special symbol are measured with the shaft pushed against the gearhead.
• All dimensions are in millimeters.
• Specifications are subject to change without notice.
• Contact information for Orbray Co., Ltd. is provided for inquiries.

Critical Parameters and Limitations

• Maximum input speed limited to 8000 rpm.
• Maximum continuous torque limited to 15 mNm (with a lower limit for certain gear ratios).
• Maximum shaft loads and play are tightly controlled to ensure precision.
• Operating temperature range is moderate, suitable for typical industrial environments.

Summary

The Orbray SSG12 Spur Gearhead series offers a range of reduction ratios with precise mechanical specifications suitable for integration with Orbray’s coreless and brushless motors. The gearheads feature metal housings, steel gears, and sintered sleeve bearings, optimized for moderate torque and speed applications with strict dimensional tolerances to ensure performance and reliability.