Friction brake NexSafe®

springfor servo motorszero-backlash

Overview
Nexen Group offers the NexSafe® family of safety-certified servomotor brakes that mount directly to a servomotor flange. Spring-engaged, air-released design provides default-to-lock safety and can be configured to achieve ISO 13849-1 Category up to 4 and Performance Level up to e when used per recommendations.

Features

• Integral keyed clamp collar for secure input connection
• Up to three operating-mode sensors: engagement, disengagement and wear
• Multiple engagement spring options for torque selection
• Default locked state (spring-engaged, air-released)
• Direct flange mounting to servomotors; zero-backlash braking interface

Operational / Industry 4.0 Capabilities

• Optional feedback sensors (engagement, disengagement, wear) for real-time status
• Sensor feedback supports motor/drive programming, predictive maintenance and condition monitoring
• Compatible with Industry 4.0 monitoring and condition-based maintenance systems

Applications

• Power-off holding and occasional/emergency E-stop dynamic braking
• Gantry systems, cyclical positioning, automotive, semiconductor and food production environments (IP67 options available; see application guidance)

Comparison / Key Technical Notes (summary)
Minimum static brake torque: 4.7 to 125 Nm
Brake backlash: Zero
Braking capabilities: Power-off holding, occasional E-stop dynamic braking
Mounting: Flange on each side with pilots to support brake alignment
Input hub options: Keyed clamp collar
Output shaft options: Keyed shaft
Bore diameters (input & output): 6.35 to 65 mm [0.25 to 2.56 in]
Flange bolt circle: 63 to 350 mm [2.48 to 13.78 in]
Safety certification: NexSafe certified to ISO 13849-1 (certified by Intertek)
Operational mode feedback sensors: Up to 3 optional sensors (engagement, disengagement, wear)
Overhung load capacity: Up to 3114 N (model dependent)
Maximum rated speed: 5,000 to 10,000 RPM

Technical specifications

• Series / product family: NexSafe® Servomotor Brake
• Brake type: Spring-engaged, air-released (default locked)
• Static brake torque range: 4.7 – 125 Nm
• Backlash: Zero
• Bore range: 6.35 – 65 mm (0.25 – 2.56 in)
• Flange bolt circle: 63 – 350 mm (2.48 – 13.78 in)
• Optional sensors: Engagement, Disengagement, Wear (up to 3)
• Overhung load capacity: Up to 3114 N (model dependent)
• Maximum RPM range: 5,000 – 10,000 RPM (model dependent)
• Mounting: Direct servomotor flange mount
• Certification: ISO 13849-1 (NexSafe certified by Intertek)