PRECISION MOTION CONTROL >>> SPRING-ENGAGED BRAKES FOR ROTARY & LINEAR APPLICATIONS > Product & Application Guide

IMPORTANT NOTICE! Nexen recommends regular inspection of the spring-engaged brake’s holding force and suggests the installation of a sensor integrated into the control system to detect engagement and disengagement. Nexen expects spring-engaged products to be used correctly and is not responsible for injuries, damages, and operational malfunctions if: • The product’s “User Manual” instructions are ignored or neglected • The brakes are used inappropriately • The brakes are modified • The brakes are handled, operated, or maintained incorrectly • A proper service factor was not used • Spring engaged...

INTRODUCTION TO SPRING ENGAGED BRAKES Nexen continues to work closely with major manufacturing organizations that want to reduce the risk of harm to people, equipment, or the environment, that may arise from the operation of a section of production equipment. An intelligent risk-reduction strategy protects personnel, machines, and the environment, increases productivity, improves efficiency and increases uptime. The result of these partnerships is a growing range of spring-engaged, air released brakes and linear clamping elements. Studies in Europe and Japan show that most robot accidents do...

PROFILE GUIDE RAIL BRAKES Nexen’s RB (rail brake) series offers holding and E-stop capability in power-off situations. Rail brakes clamp onto the center of profile guide rails to provide positive braking and holding in all axes without touching the bearing surface of the rail. High holding force and very low backlash make it ideal for accurate position holding where drive train backlash or lack of rigidity could allow excessive movement. • Available for profile guide rail sizes: 15, 20, 25, 30, 35, 45 Spring-engaged, air-released Static holding force from up to 585 lbs [2,600 N] Fast engagement:...

ROD LOCKS Nexen RL rod locks provide incredible holding force on NFPA and ISO cylinders, and precision rods in a small package. Their internal clamping collar spreads the clamping load over a large area on the rod ensuring it doesn’t damage it and gives a long life. Very low backlash and no rod displacement when engaging/disengaging allows accurate positioning. Optional manual release allows rod movement without air pressure and engagement/disengagement sensor provides lock mode feedback in critical applications. • Static holding force from 180 - 8560 lbs [890 - 38,077 N] Holding forces exceed...

SERVOMOTOR BRAKES Nexen’s servo motor brake is designed to mount to the shaft end of servomotors up to 20 horsepower. The brakes input and output features can be the same or different allowing it to act as an adapter between dissimilar mounting features. The input end bore accepts the motor shaft and is fixed inside the brake with a split-hub-shaft collar arrangement. With higher torque, and durability, than other braking options and true zero backlash and high rididity so drive system accuracy is not effected. • Seven sizes to fit servomotors up to 20 horsepower Models available for NEMA 23,...

BALL SCREW BRAKES Nexen’s Ball Screw Brakes provide reliable holding in a compact package, overcoming a common problem found in vertical ball screw applications. During a power loss the motor has no holding torque allowing the ball screw to back drive and the load to drop. Even when a brake-motor is used the brake tends to be weak and doesn’t withstand many E-stops before failing. Ball Screw brakes connect to the machined end of a ball screw to prevent back driving, load drops, and equipment damage even if the motor or reducer fails. Five models with torque up to 1100 in-lbs [125 Nm] True zero...

Nexen has several flange-mount, spring-engaged brake designs. These are mounted directly on NEMA and IEC flanged motors and/or gearboxes. The SE and FMBES models can also be foot mounted with input shafts. Holding Torque 100-2000 in-lbs [11-226 Nm] Key Features Manual Release Low Inertia Easy Facing Replacement 8 Springs E-Stops Power-Off Stopping/Holding Accurate Position Holding

Nexen spring-engaged, shaft-mount brakes are a self-contained package, easy to install and service. They provide high dynamic torque, and their ventilated discs can handle a lot of heat, making them ideal as emergency stopping brakes. Long facing life ensures low maintenance with little down-time.

CALIPER BRAKES Caliper brakes are a popular design when high stopping or holding torque is required. By combining the disc diameter of your choice and one or more calipers equally distributed around that disc you can build a custom system with standard components. Caliper brakes can also be used in linear applications by clamping on a suitable rail. Nexen offers various sizes and styles of spring engaged air released calipers and discs that go with them. • Five spring-engaged, air-released models in twelve sizes: DBSE, BC, BD, VC500, SPC High Static Torque: 700 - 50,000 in-lbs [79 - 5,650 Nm]...

Nexen’s FMCBES and DAP series clutch-brake combinations feature a spring-engaged brake and an air-engaged clutch. The brake is normally on until air is applied to a single port to engage the clutch while simultaneously disengaging the brake. • Two models- 13 sizes: FMCBES (11) and DAP (2) • Static clutch torque from 232 - 680 in-lbs [26 - 77 Nm] • Static brake torque from 142-495 in-lbs [16 - 56 Nm] • Shaft/bore sizes from 0.626 - 1.375 in [14 - 42 mm] • Fits NEMA motor frames 48 to 215TC or IEC 71A to 160M • Speeds up to 3600 rpm • Foot mount adapters and shafted input units optional •...

AEROSPACE AUTOMATION AUTOMOTIVE CUTTING SYSTEMS INDUSTRIES & APPLICATIONS GANTRY SYSTEMS LIFTS & HOISTS MATERIAL HANDLING www.nexengroup.com In accordance with Nexen’s established policy of constant product improvement, the specifications contained in this document are subject to change without notice. Technical data listed in this document are based on the latest information available at the time of printing and are also subject to change without notice. For current information, please consult www.nexengroup.com or contact Nexen’s Technical Support Group at the location to the right. Nexen Group,...