Caliper disc brake SPC

spring

Overview
Nexen Group Caliper Brakes are engineered for holding, emergency stop (e-stop) and controlled deceleration in industrial applications. Disc diameters up to 609.6 mm (24 in) provide torque capacity to ~5,649 Nm (50,000 in-lb). Multiple calipers can be mounted on a single disc to increase torque; units accept a range of disc thicknesses and actuator configurations.

Key features

• Spring-engaged / air-released and air-engaged / spring-released configurations
• Disc diameters from 254 mm to 609.6 mm (10 to 24 in)
• Adjustable caliper spacing for various disc widths
• Option for detent pins for quick-facing shoe removal
• Simple open design with optional guards and disengagement sensors
• Multiple mounting options: pedestal, foot mount or shaft-mounted disc-hub

Selected models and torque examples

• VC500 — Up to 4,861 Nm (43,023 in-lb) with Ø 609.6 mm (24 in); Spring-engaged, air-released; typical release pressure 4.1 bar (60 psi)
• SPC — Up to 5,649 Nm (50,000 in-lb) with Ø 609.6 mm (24 in); Spring-engaged, air-released; typical release pressure 4.8 bar (70 psi)
• BD (spring + actuator) — Up to 2,147 Nm (19,000 in-lb); Spring-engaged, air-released or hydraulically released; release pressure examples 4.1/5.2 bar (60/75 psi) or hydraulic 3.4/17.2 bar (50/250 psi)
• BC-S / BC-A / DBSE — Models ranging ~323 to ~599 Nm depending on disc size; multiple engagement/release methods; typical release pressures 2.8–6.6 bar (40–95 psi)

Additional product notes

• Disc clamping force and resulting torque depend on disc diameter, disc-hub and actuator configuration
• Units are available without actuators (actuators sold separately); final torque and engagement/release behavior depend on chosen actuator(s)
• Some models available with straight facings for linear braking and with disengagement sensors

Technical specifications

• Applications: controlled deceleration, cycling/indexing, positioning, stopping/holding, tension control, counterweighted elevators, e-stop
• Maximum offered disc diameter: up to 609.6 mm (24 in)
• Typical disc thicknesses: 6.35 mm, 9.53 mm, 12.7 mm (model-dependent); brakes adjustable to other disc widths
• Torque capability examples: up to ~5,649 Nm (50,000 in-lb) for largest configurations; hundreds of Nm for smaller models
• Engagement/Release methods: spring-engaged/air-released; air-engaged/spring-released; spring-engaged/hydraulically-released (select models)
• Release pressure (examples): pneumatic 3.0–6.6 bar (44–95 psi); hydraulic options such as 3.4 or 17.2 bar (50 or 250 psi)
• Typical disc-hub max speeds: up to 3,800 RPM with Ø 304.8 mm; up to 2,800 RPM with Ø 406.4 mm; some smaller discs rated up to 4,500 RPM
• Mounting: disc-hub shaft mount; caliper pedestal or foot mount (varies by model)
• Special options: straight facing for linear braking, disengagement sensor, single or dual actuator configurations