Brushless servo motor

24 V48 Vwith brake

Introduction
The sealed joint module is engineered for underwater and marine-specialized robots. Fully integrated components — harmonic reducer, frameless torque motor, brake, encoder and driver — deliver precise motion control with increased torque density, improved positioning accuracy and reduced axial profile. Available customizable variants address marine conditions including splash/spray protection and underwater operation down to 1 m, as well as low-temperature adaptations for arctic or cold-water deployments.

Core Components

• Harmonic reducer (integrated)
• Frameless torque motor
• Brake
• Encoder
• Driver (integrated)

Features

• Environmental Adaptability: Low-temperature options use cryogenic-grade lubricants and PCB protections to support operation from -40°C to 65°C; designed to resist humidity, high salinity, dust and seawater exposure.
• Long-Term Reliability: Self-adaptive sealing system engineered for maintenance-free operation up to 6,000 hours; stainless steel housing delays corrosion in marine environments.
• Performance Stability: Sealing prevents liquid-induced electrical failures and bearing wear, ensuring consistent torque under submerged or splash conditions.
• Compact & Lightweight Integration: Direct-drive topology reduces external transmission elements, lowering hydrodynamic drag and overall mass.

Sealing System
Multi-layer junction sealing combines gaskets and structural adhesives with protective covers to block liquid ingress at mechanical interfaces. Dynamic sealing uses dual-layer lip seals between rotating outputs and housing. Precision sealing surfaces are finished to Ra0.1–Ra0.8 and paired with controlled oil-film barriers to achieve micron-level sealing performance suitable for short-term submersion and continuous spray exposure.

Protective Housing
Stainless steel shell provides corrosion resistance and mechanical robustness for offshore and subsea environments. Critical zones are reinforced and designed to meet IP67 protection characteristics against dust and temporary submersion; materials and coatings are selected for seawater compatibility.

Integrated Drive
Frameless motors directly coupled to harmonic reducers minimize exposed transmission parts and reduce enclosure penetrations. The integrated driver, encoder and brake arrangement yields a compact actuator module optimized for underwater manipulators, ROV arms and other marine robotic joints.

Specification (table)
Category: Marine-focused features
Sealing innovation: Ultra-precise sealing surfaces (Ra0.1–Ra0.8) combined with oil-film dual barrier.
Material/process: Stainless steel housing for corrosion resistance; thermal silicone aids heat dissipation to protect seals from expansion.
Circuit protection: Integrated ESD and TVS modules to prevent failures in humid or salt-laden environments.

Technical specifications

• Waterproof capability: splash/spray protection and underwater operation up to 1 m depth (waterproof variants)
• Operating temperature (customized low-temp): -40°C to 65°C with cryogenic lubricants and protected circuits
• Sealing maintenance interval: self-adaptive sealing designed for zero maintenance for 6,000 hours
• Housing material: stainless steel (seawater-resistant)
• Sealing surface roughness: Ra0.1–Ra0.8
• Protection: critical areas reinforced to meet IP67-level characteristics
• Integrated components: harmonic reducer, frameless torque motor, brake, encoder, driver
• Circuit protections: integrated ESD and TVS modules
• Sealing structure: multi-layer junction sealing, dual-layer dynamic seals, oil-film barrier
• Design benefits: compact size, reduced external transmission parts, lower underwater drag, consistent torque output for marine applications