Guide rail brake catalog
13Pages

Spring Engaged, Air Released LINEAR MOTION CONTROL Technical Data Sheet LINEAR MOTION CONTROL TECHNOLOGY Manual Rail Brake: • RBB: NexSafe™ Safety Rated Rail Brake, Spring Engaged, Air Released • RBM: Manual Rail Brake, Manually Engaged and Released Manually Engaged & Released Linear Profile Guide Rail Brakes: NexSafe™ Safety Rated Rail Brake: Certified Safety Products

A New Standard In Performance Nexen’s RBB Series of linear profile guide rail brakes use spring force to secure the load in holding applications. Superior response time and high force for stopping and holding in e-stop and power-off situations. Each RBB brake clamps directly onto the guide rail to provide positive braking and holding in all axes, with no effect on bearing surfaces. Nexen’s Spring Engaged, Air Released Rail Brakes are safety rated to comply with international safety standard ISO 13849-1. Category Level up to 4 and Performance Level up to e, able to be achieved using Nexsafe™...

RBB Rail Brake Specifications Friction Facing Facing Return Springs Roller Bearing Driving Wedge Driving Wedge Support Piston Drive Actuator Engagement Springs Specifications Model Holding Force (F) (minimum) Backlash at Full Brake Force (maximum) Release Pressure (minimum) Ambient Cycle Life Temperature (B10) Contact Nexen if one or more of these specifications must be modified for your application. 1 RBL55B & RBL65B are not currently safety rated, nor are they available with operating mode sensors. 2 Average, full engagement time with up to 2 meters length of 4mm, polyurethane tube, and...

RBB Rail Brake Product Numbers by Rail Type Rail/Carriage Manufacturer Rail Type NHRC / NARC STAR (BOSCH) (REXROTH) Contact Nexen if you don’t see the rail listed above for your application, or need operating mode sensors for your application. All Rail Brakes shown are Safety Rated and can be modified to add operating mode sensors, except sizes 55 & 65. All Rail brakes shown above have a release pressure of 5.5 BAR [80 PSI], many rail types/sizes are available with release pressures below 4.1 BAR [60 PSI]. [1] Rail brake holding forces are 10% less than shown on the previous page when used...

RBB Rail Brake Dimensions A B Contact Nexen if one or more of these dimensions must be modified for your application. F1 Screw size F2 Scew depth (4x) Transition (Carriage) Plate Height * Disengagement Port 4 MM or 5/32 in Tube Threaded Port *Additional dimensions and tolerances are available in the drawings and CAD models on the product pages on Nexen’s website. See Page 9 for optional operating mode sensor dimensions. RBB Typical Mounting Arrangement Note: efer to Drawings and CAD models on www.nexengroup.com to determine if Nexen’s Rail Brake and the R application’s Bearings have the...

RBB Rail Brake Sample Calculations for Emergency Stops SAMPLE DATA Brake Model1, 2 Brake Engagement Time (te)1 For brake specifications, see Specifications Table on page 4. HORIZONTAL TRAVEL (X and Y axis) VERTICAL TRAVEL (DOWNWARD) (Z axis) Dynamic Stopping Time (in seconds): Dynamic Stopping Time (in seconds): Dynamic Stopping Distance (in meters): Dynamic Stopping Distance (in meters): Distance of Travel During Brake Engagement (Le) Distance of Travel During Brake Engagement (Le) Stopping Distance (Ls) at Full Brake Force Ls = Stopping Distance (Ls) at Full Brake Force Total Travel...

Safety Rating With third party certification carried out by Intertek©, Nexen’s Rail Brakes are safety certified components capable of meeting the following ratings per safety standard ISO 13849-1:2015. Cycle Life (B10D) of 4 million cycles Mean Time to Dangerous Failure (MTTFD) of 100 Years Assumes a B10D of 4 million cycles, H(op) of 16 hours/day, a Common Cause Failure (CCF) is 75% D(op) of 260 days/year, maximum cycle rate of 37.4 seconds/ Mission Time is 10 Years cycle and maximum operation time of 10 years. Diagnostic Coverage (DC) is dependent on brake redundancy and sensor setup: If...

Safety Rating Category 3 or Category 4 Example: Two Redundant Brakes, Two Sensors on Each Category 3: Safety Rated Rail Brake Control Circuit Regulator Gauge Air Filter Dryer Supply Quick Exhaust Valve Control System Performance Level Quick Exhaust Valve MTTFD Maximum average cycle rate Maximum operation time Safety Rail Brake Unit Dual Operating Mode Sensors Brake Inlet Category 4: Performance Level If DC is Brake Inlet MTTFD Maximum average cycle rate Maximum operation time Safety Rail Brake Unit Dual Operating Mode Sensors Air to Disengage Rail Brake Control Wiring Sensor Feedback Wiring...

Optional Operating Mode Sensors SAFETY RATING COMPLIANCE Nexen’s Rail Brakes are Safety Rated by Intertek© and available with Operating Mode Sensors. By using the Operating Mode Sensor for either Engagement or Disengagement, system manufacturer’s are able to gain higher safety category ratings per ISO 13849-1. Rating of the overall safety channel is the responsibility of the system manufacturer. Sensor Housing Sensing Surface Nexen’s Rail Brake Operating Mode Sensors for either Engagement or Disengagement are Industry 4.0 compatible and can provide information to maximize machine...

Optional Sensors: Dimensions * These Dimensions are the same as standard units, see Page 6 A* Transition * (Carriage) Plate Height F1 Screw Size * F2 Screw Depth * (4X) The following dimensions apply only to Nexen's optional sensor setup, which may be installed on Safety Rated Rail Brake units. Additional dimensions and tolerances are available in the drawings and CAD models on the product pages on Nexen’s website, www.nexengroup.com Port 4MM or 5/32 inch Tube Contact Nexen if one or more of these dimensions must be modified for your application. N/A, Not available with optional operating...

A New Standard In Performance RBM: Manual Rail Brake Nexen’s RBM Series of linear profile guide rail brakes use a manually actuated lever to secure the load in holding applications. With no effect on bearing surfaces, the brake provides positive zero backlash holding in all axes. The compact footprint, compared to pneumatic and electric rail brakes, allows for ease of installation. Nexen’s RBM Series is engineered for dependable performance. The RBM Series provides an industry leading braking solution for linear profile guide rails. If personnel safety is required, an unrelated, redundant...