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Nexen Profile Rail Brakes
Unit of Measure
Items Nexen Profile Rail Brakes
04229743
Nexen 202 Pound (lb) Holding Force Profile Rail Brake 		Nexen Profile Rail Brakes
04777156
Nexen 90 Pound (lb) Holding Force Profile Rail Brake 		Nexen Profile Rail Brakes
05334910
Nexen 360 Pound (lb) Holding Force Profile Rail Brake 		Nexen Profile Rail Brakes
05647917
Nexen 292 Pound (lb) Holding Force Profile Rail Brake 		Nexen Profile Rail Brakes
05824285
Nexen 180 Pound (lb) Holding Force Profile Rail Brake
Description N/A 968151 RB25B Rail Brake N/A 968135 Guide Rail Brake N/A 968165 Brake N/A 968120 Brake N/A 968146 Rail Brake
Supplier Name N/A Nexen
Manufacturer Part Number N/A 968151 N/A 968135 N/A 968165 N/A 968120 N/A 968146
Air Chamber Volume N/A 6.800 cm³ N/A 2.600 cm³ N/A 16.600 cm³ N/A 13.400 cm³ N/A 4.700 cm³
Approximate Engagement Response Time N/A 0.050 s N/A 0.049 s N/A 0.070 s N/A 0.070 s N/A 0.044 s
Backlash N/A <0.20 in
Brake Series N/A RB25B N/A RB15B N/A RB35B N/A RB30B N/A RB20B
Engagement N/A Spring Engaged
Release N/A Air Release
Facing Kit N/A 968325 N/A 968302 N/A 968349 N/A 968340 N/A
Finish N/A Black Oxide
Function N/A Stopping and Holding
Holding Force N/A 202 lb N/A 90 lb N/A 360 lb N/A 292 lb N/A 180 lb
Life Rating N/A More than 1,000,000 Static Holding Cycles
Mass N/A 1.86 lb N/A 0.904 lb N/A 4.50 lb N/A 3.40 lb N/A 1.367 lb
Maximum Backlash at Full Brake Force N/A 0.008 in N/A 0.004 in N/A 0.008 in N/A 0.008 in N/A 0.005 in
Maximum Pressure N/A 100 psi N/A 103 psi N/A 128 psi N/A 113 psi N/A 114 psi
Minimum Release Pressure N/A 80 psi
Overall Height N/A 1.181 in N/A 0.827 in N/A 1.575 in N/A 1.378 in N/A 1.004 in
Overall Length N/A 3.1900 in N/A 2.640 in N/A 4.173 in N/A 3.937 in N/A 3.0300 in
Overall Width N/A 2.736 in N/A 2.146 in N/A 3.917 in N/A 3.524 in N/A 2.539 in
Port Size N/A M5 x 0.8 N/A M5 x 0.8 N/A M6 x 1.0 N/A M6 x 1.0 N/A M5 x 0.8
Rail Series N/A SR N/A HSR N/A 1605 1607 1645 1647 LLRHS-A LLRHS-LA LLRHS-SA N/A LH NH N/A 1605 1607 1645 1647 LLRHS-A LLRHS-LA LLRHS-SA
Rail Size N/A 25 mm N/A 15 mm N/A 35 mm N/A 30 mm N/A 20 mm
Rail/Carriage Manufacturer N/A THK N/A THK N/A SKF STAR N/A NSK N/A SKF STAR
Rating N/A European Conformity (CE) Restriction of Hazardous Substances (RoHS)
Weight N/A 2.2 lb N/A 2 lb N/A 4.800 lb N/A 4.00 lb N/A 2.10 lb
Features & Benefits N/A
  • Large friction facing contact area for consistent performance and low rail wear
  • Field serviceable friction facing replacement
  • Ideal for power-off, e-stop and holding applications
  • Low backlash for accurate position holding
  • Brake geometry is similar to linear bearing cassettes for easy installation
  • Provides stiffness and eliminates vibration in linear drives
  • Large clearance between brake and rail compensates for installation misalignment
  • No lubrication or periodic maintenance required
  • Models available to fit most common profile guide rails
  • Highest spring engaged / air released holding force on the market
  • Static holding cycle life in excess of one million cycles
General Information N/A Not for use in cyclic dynamic braking applications.