RPS stands for Roller Pinion System, a revolutionary linear drive system that consists of a pinion with bearing supported rollers, which meshes with a unique tooth profile. At all times two rollers are in contact with opposing tooth faces, which results in zero backlash and a very constant meshing pitch circle. The system can run at high speed over any distance with no cumulative error.

FEATURES:
• Accuracy: 20µ
• Repeatability: 10µ
• Backlash: < 3.2µ
• High efficiency: up to 99%
• Low noise
• High speed: up to 11m/s

Nexen offers an advanced new technology that revolutionizes rotary motion. The Roller Pinion Gear system (RPG) provides zero backlash, very high positional accuracy, 99% efficiency, high rigidity, low maintenance, corrosion resistance, and long life. This opens up new design possibilities and provides the capability to achieve much higher levels of performance in machine designs.

The RPG system features an innovative ring gear and roller pinion technology that provides extremely accurate positioning. The Roller Pinion Gear system also offers backlash-free performance in both directions by maintaining opposing contact with two or more teeth at all times.

The RPG system maintains accurate positioning at peripheral speeds as high as 11 m/sec (36.1 ft/sec). Even at these speeds, the extremely-low friction design does not create heat or wear on components.

Nexen can provide solid ring gears up to one meter in diameter. Ring gears larger than this become segmented and can be virtually any diameter. Arc segments can also be provided.

Nexen’s RB Series of linear profile guide rail brakes uses spring force to secure the load in holding applications. They offer superior response time and high forces for e-stop and holding in power-off situations. The RB brake clamps directly onto the sides of the guide rail to provide positive braking and holding in all axes. These profile rail brakes hold position accurately, eliminating drive train backlash and elasticity.

Fits profile guide rail sizes 15, 20, 30, 25, 35, and 45
Holding forces up to 2600N

• Spring engaged, air released for power-off, e-stop and holding applications
• Configurations for Hiwin, NSK, Schneeberger, SKF, IKO, INA, Star, THK
• Brake geometry is similar to system bearing cassettes for easy installation
• Low backlash for accurate position holding
• Adjustable facing gap for optimum brake performance
• Field serviceable friction facing replacement
• Large friction facing contact area
• No lubrication or periodic maintenance required
• Provides stiffness and eliminates vibration in linear applications

Nexen’s RBE model Electric Rail Brake provides a new level of performance and reliability for electric clamping on profile guide rails with fast response times, low backlash and on-board diagnostics. Nexen’s mechatronic technology combines the latest electronic and mechanical components, providing the best combination of features available in electric rail brakes today.

• Once engaged, power can be removed and full brake holding force will remain
• Brake completely disengages with considerable clearance, eliminating system friction and allowing minor variations in rail alignment
• On-board controller for easy wiring and on-board diagnostics
• Brake provides clamping feedback: electrical signal and on-board LED
• Configurations to fit profile guide rails from THK, IKO, HIWIN, NSK and INA

Nexen's RBR-series rail brakes are ideal for clamping and power-off holding applications. The unique piston design allows high clamping forces and low release pressures.
The RBR is engineered for dependable performance, easy set up and low maintenance.

• Spring engaged, air released for clamping and holding during power interruptions
• Low backlash for accurate positioning
• Brake shoes field serviceable
• Easy to set up, requires no adjustments
• Low release pressure

These spring engaged, air released holding/locking devices are designed for accurate positioning and holding in power-off situations as well as for emergency stopping. The locking element mounts directly onto the front of an ISO cylinder. The front end of the locking element has ISO compliant dimensions for easy integration. Models are also available for guide rods.

FEATURES:

• No displacement upon locking
• Clamping force up to 12500N
• Large clamping surface ensures consistent performance
• Spring engaged air released (4 bar minimum release pressure)
• Fast response
• Sealed to withstand harsh environments

OPTIONS:

• Anodized finish
• Status feed-back sensor
• Manual release

 

Nexen's family of servomotor and stage brakes have superior torque outputs, providing rugged durability for dynamic stopping and holding applications. Eclipse brakes offer consistent long-lasting performance with no maintenance needed. Nexen's servomotor brakes deliver at least 20-50% more torque than competitive brakes and provide safe, simple operation. There are more than 50 Eclipse brakes in eight sizes available to fit virtually any servomotor.

• Torque: 2,25 – 124 Nm
• Zero backlash for precision holding
• Spring engaged, air released
• Quick, safe emergency stopping and holding
• Designed for horizontal or vertical applications
• Strong enough to stall a servomotor
• True pilot mounting
• High torque when compared to electric brakes
• Output flange replicates motor flange
• Meets IP67 dust and waterproof standards

This spring engaged, air released brake is designed for zero backlash holding of the free end of a ball screw spindle to provide higher stiffness or holding in power-off situations without loss of accuracy.

FEATURES:

• Torque up to 125Nm
• 5,5 bar release pressure
• Zero Backlash holding
• Does not cause displacement when engaging
• Fast response
• Also suited for emergency stopping
• Integrated coupling to compensate thermal expansion of ball screw spindle

OPTIONS:

• Lower release pressure
• Custom bore sizes

The LC linear couplings are axially stiff with a large angular and parallel alignment capacity. They are ideal for preventing binding or wear when used in combination with linear drives or sensors.

FEATURES:

• Parallel misalignment up to 0,7mm
• Angular misalignment up to 1.5°
• Zero axial backlash
• Maintenance free
• Low inertia

The trend in industry is to design and incorporate more automation into production processes. Machines are becoming more accurate, requiring a higher degree of precision.
Machine downtime in an automated production environment is very costly. Broken components, costly technicians, and long lead times for custom components can make the difference between operating profitably or not. Nexen's Mechanical Torque Limiter will isolate the driving from the driven elements within a matter of milliseconds.

Single-Position Re-engagement

• After the overload has been removed, the coupling will re-engage precisely 360 from the original disengaged position.
• Overload signal is accomplished with a mechanical switch or proximity sensor.

Multi-Position Re-engagement

• Coupling re-engages at multiple set angular intervals.
• Immediate availability of the machine as soon as the overload has been removed.
• Overload signal is accomplished with a mechanical switch or proximity sensor.

Full Disengagement

• Permanent separation of drive and driven face in event of a torque overload.
• Coupling can be re-engaged manually.
• No residual friction.
• Overload signal is accomplished with a mechanical switch or proximity sensor.

Air-engaged Brakes

• Torque: 2 – 33900 Nm
• Bore: 10 – 165mm
• Air-engaged/spring-released models
• High heat dissipation
• Straight or taper (QD bushing) bore
• Self-adjusting for friction facing wear
• Split friction facings for fast replacement

Spring-engaged Brakes

• Torque: 6 – 18642 Nm
• Spring-engaged/air-released models
• Shaft mounting, straight or tapered bores
• NEMA C-faced or IEC B5 flange mounting
• Totally enclosed (IC65) models available

Caliper Brakes

• Torque: 2,3 – 5649 Nm
• Disc diameters: 152 – 610 mm
• Air-engaged/spring-released models
• Spring-engaged/air-release models
• Spring-engaged/hydraulically released
• Adjustable caliper spacing
• Easy friction facing replacement

• Shaft-mounted Clutch-Brakes
• Torque: 1 – 316 Nm
• Shaft diameters: 12 – 46 mm
• Air-engaged/spring released models
• Through-shaft mounting on driven shaft
• Pilot mounting: sprocket, pulley or coupling
• High cycling rates and long life
   
• Flange-mounted Clutch-Brakes
• Torque: 9,6 – 226 Nm
• Air-engaged/spring-released models
• Spring-engaged/air-released models
• Fits NEMA frame sizes 48Y to 256TC
• Fits IEC frame sizes D71C to 160M
• Use with 0,09 – 14.6 Kw motors
• Self-adjusting for friction material wear

 

• Friction Clutches
• Torque: 0,6 – 34128 Nm
• Bore: 10 – 165mm
• Air-engaged/spring-released models
• High heat dissipation
• High dynamic torque
• Long friction facing life
• Single or multi-plate clutch models
   
• Tooth Clutches
• Torque: 3 – 6779 Nm
• Bore: 13 – 100 mm
• Air-engaged/spring-released models
• Spring-engaged/air-released models
• Single- or multi-position models
• Totally enclosed (IP65) models
• Positive engagement; no slipping

All nexen unwind brakes offer accurate torque control combined with excellent heat exchange characteristics. Their long life and easy parts replacement make them ideal for demanding tension control applications. Nexen also has various multiple piston designs. Depending on your torque requirements you can select how many pistons are active, combining great performances with great flexibility.

• Use for wind, unwind and intermediate stages
• Torque: 9 – 4049 Nm
• Air-engaged
• Multiple actuators for wide torque range
• Self-cooling for high thermal capacity
• Integrated fan available on some models
• Low rotational inertia
• Long operating life
• Simple connections
• Quick change friction facings

Nexen offers complete packages to adjust the torque output of any controllable brake, clutch or drive used in the processing of continuous materials like paper, film, wire or foil. From load cell based systems over dancer arm control packages to diameter compensating devices. Please contact us or one of our partners to find out which solution best suits your needs. Our components are designed for easy installation on existing equipment and operator interventions are reduced to a minimum.

• Complete systems for easy integration
• Closed-loop controls
  • Adaptive or PID logic
  • LVDT or strain gauge sensors
  • Flying splice or auto-pasting control
  • DIN rack mounting available
  • Unwind, winding or mid-process control
• Dancer controls
  • Adaptive or PID logic
  • Hall effect dancer position sensor
  • Unwind, winding or mid-process control
• Open-loop controls
  • PID logic
  • Ultrasonic, optical or proximity control
  • Unwind or winding control
• All systems feature:
  • 4-20 ma or 0-10 VDC outputs
  • PC/PLC based set-up available
  • Control the torque output of brakes, clutches and AC or DC drives

Nexen's line of rugged safety chucks provide fast roll change. Redundant safety mechanisms provide maximum worker safety.

CHARACTERISTICS

• Roll weight: 430-1360 kg
• Max Speed: 1300-1000 RPM

OPTIONS:

• Shaft extension cut to length
• Brake adapter plate