Shanghai Hengxiang Optical Electronics Co., Ltd. — Precision Encoder Manufacturer Since 2001

Shanghai Hengxiang Optical Electronics Co., Ltd. is a high-tech enterprise specializing in the research, development, production, and sales of high-precision optical encoders. Founded in 2001 and headquartered in Songjiang District, Shanghai, the company traces its engineering roots back to 1985, when its predecessor began as an optical instrument factory focused on precision lens manufacturing. This optical heritage has given Hengxiang a rare vertical integration advantage — from optical materials and code discs to finished encoders.

Core Technical Advantages

Hengxiang designs and manufactures its own grating code discs, the critical optical component that determines encoder resolution and accuracy. Unlike many encoder manufacturers that rely on third-party components, Hengxiang controls the entire optical chain in-house. The company holds 55 patents, including an invention patent granted in June 2025 for a “Compact Bearingless Absolute Encoder” that addresses vibration-induced damage. Hengxiang is ISO9001 certified, CE compliant, and recognized as a Shanghai High-Tech Enterprise, a provincial “Specialized, Refined, Distinctive, and Innovative” (专精特新) Enterprise, and a Technology-Based SME. In 2024, the company received AAAA-level credit certification.

Product Portfolio

Hengxiang offers more than 10 series and over 100 encoder specifications, covering incremental, absolute, sine-cosine, and magnetic encoder types.

• ZM35 Series – Multi-turn absolute bearingless encoder. Outer diameter 35mm, thickness 11.8mm, weight approx. 80g. Accuracy ±80″. Single-turn resolution 24 Bits (expandable to 32 Bits), multi-turn up to 24 Bits with power-off memory. BiSS_C / SSI interface. Ideal for servo motors and robotics in space-constrained applications.

• WSN49 Series – Incremental bearingless magnetic encoder. Off-axis bearingless design, IP67 protection, operating temperature -40°C to +100°C. Maximum error ±0.3°, resolution up to 8192 PPR, maximum speed 18,000 rpm. Suitable for textile, packaging, motors, elevators, and CNC under harsh conditions.

• KM60 Series – Multi-turn absolute optical encoder. Outer diameter 60mm, thickness 39.8mm, shaft diameter 6-15mm. IP65 protection, operating temperature -40°C to +95°C. Single-turn resolution 24 Bits (expandable to 32 Bits), multi-turn 24 Bits, accuracy ±180″. BiSS_C / SSI / RS485. For servo motors, robotics, and industrial automation.

• PM57 Series – Multi-turn absolute bearingless encoder (through-shaft). Thickness only 10mm, shaft bore 14-24mm. Single-turn / multi-turn up to 24 Bit. Supports BiSS-C, SSI, RS485. Ideal for CNC machine tools, textile machinery, printing machinery, elevators, and motors.

• ST58 / ST65 Series – Sine-cosine / incremental optical encoder (tapered shaft). Outer diameter 58mm / 65mm, thickness 38.2mm / 40mm. Shaft diameter 9.25mm (taper 1:10). Sine-cosine resolution 1024 / 2048; incremental resolution up to 32,768 PPR. Operating temperature -40°C to +115°C, IP40. For elevators, motors, and CNC.

• K60 Series – Incremental optical encoder (through-shaft). Outer diameter 60mm, thickness 40mm, max bore 15mm. Resolution up to 65,536 PPR. IP65 protection, operating temperature -40°C to +90°C. For textile, packaging, motors, elevators, and CNC.

Applications

Hengxiang encoders are widely used in industrial robots (joints, servo motors), UAVs (gimbals, servos), CNC machine tools (spindles, feed axes), medical equipment (CT scanners, surgical robots, diagnostic analyzers), elevators (traction machines, door operators), wind power (pitch and yaw systems), textile machinery, packaging machinery, printing machinery, semiconductor manufacturing, precision measurement, military equipment, and aerospace.

The company supports OEM and ODM customization, including shaft diameter, resolution, output interface, and protection rating. Products are exported to more than 120 countries, serving industrial automation customers worldwide.

Contact Information

Shanghai Hengxiang Optical Electronics Co., Ltd.
Website: www.shhxgd.com
Address: Building 7, Chuangyi International Enterprise Park, Lane 115, 1276 Nanle Road, Songjiang District, Shanghai, China
Tel: +86-21-54613487 / 54351672