Products
Rotary Motion Control
All Rotary Motion Control
Rotary Indexers
Rotary Indexers
Roller Pinion Gears
Geared Bearings
Gears
Precision Brakes
Ball Screw Brakes
Shaft Brakes
Servomotor Brakes
Electric Servomotor Brake
Gearheads
Gearheads
Rotary Motion Control
Rotary Motion Control including Rotary Indexers, Roller Pinion Gears, Precision Brakes and Harmonic Gearheads.
Rotary Indexers
Based on Nexen’s innovative Roller Pinion technology, Nexen Ring Drive (Compact Precision Ring Drive and Precision Ring Drive) systems come complete with a precision grade bearing and drive mechanism in a rigid housing to simplify the selection process. With all the features of our other advanced Roller Pinion System technology, Nexen's Ring Drives open up new design possibilities for the next generation of machines.
Rotary Indexers
Based on Nexen’s innovative Roller Pinion technology, Nexen Ring Drive (Compact Precision Ring Drive and Precision Ring Drive) systems come complete with a precision grade bearing and drive mechanism in a rigid housing to simplify the selection process. With all the features of our other advanced Roller Pinion System technology, Nexen's Ring Drives open up new design possibilities for the next generation of machines.
Rotary Indexers
Based on Nexen’s innovative Roller Pinion technology, Nexen Rotary Indexer Systems come complete with a precision grade, high capacity bearing and drive mechanism in a rigid housing.

With options for high speed, high torque and zero backlash, Nexen Ring Drives can be optimized for every application. With accelerations up to twice as high as other indexing technologies, Nexen Ring Drive systems provide more productivity while boasting low maintenance, high efficiency and long life.
Roller Pinion Gears
Nexen’s patented rack and roller pinion design maintain high repeatable accuracy with zero backlash over longer distances with quieter operation - even at high speeds.
Geared Bearings
Nexen Group's Geared Bearing solution is ready to be integrated into a machine with its full ring gear and a high-capacity cross-roller bearing.

Based on Nexen Group's innovative Roller Pinion technology, the Roller Pinion System Geared Bearings come complete with a precision zero backlash gear mounted on a precision grade, high capacity bearing. Geared Bearings can be incorporated into any precision rotary motion control application with a number of possible sizes and gear ratios, all with zero backlash.
Gears
Nexen Group's Roller Pinion Gear System is based on an innovative pinion consisting of bearing-supported rollers and a unique tooth profile. Gears, Gear segments and geared bearings can be configured to meet the application needs.

This unique drive system provides high positional accuracy, Zero Backlash, no cumulative error, low-velocity ripple, high speeds, rigidity, low noise, low maintenance, corrosion resistance, and long life. This opens up new machine design possibilities and provides the capability to achieve much higher performance levels.
Precision Brakes
Nexen’s Ball Screw / Shaft Brake / Servomotor Brake is a high-torque, spring-engaged, air-released brake. It serves as a redundant safety brake in the event of a mechanical defect in the drive line, particularly in the Z-axis. These brakes provide high accuracy for holding the position in power-off situations.
Ball Screw Brakes
Nexen Group's Ball Screw Brake is a high-torque, spring-engaged brake acting on the machined end of a ball screw. It serves as a primary or redundant safety brake to prevent back driving if a power loss or mechanical defect occurs in the driveline.
Shaft Brakes
Nexen Group's Shaft Brake has several bore sizes available, offering an off-the-shelf, Zero Backlash braking solution for shaft-holding applications. These spring-engaged, air-released brakes offer outstanding holding for consistent, long-lasting performance.
Servomotor Brakes
Nexen Group's Eclipse® spring-engaged, air-released servomotor brakes offer a powerful, high-torque, and no-slip holding option. The Eclipse Servomotor brake is installed between the motor and the linear device, providing improved safety with low inertia.
Electric Servomotor Brake
The Evolve Electric Servomotor Brake is spring engaged, electrically released, and easily configured to match the servo/stepper motor and gearhead mating interfaces. Engineered with Zero Backlash and double-sided friction interface for increased torque capacity, this brake offers a solution for the most demanding applications.
Gearheads
Nexen Groups's Harmonic Gearhead is the perfect combination of size and precision. When combined with Nexen Group's Poller Pinion System, a true backlash-free solution from the motor to the driven load can be achieved. Machine designers will have up to a 70% reduction in length over standard gearheads, gaining increased space in a design.
Gearheads
Nexen Groups's Harmonic Gearhead is the perfect combination of size and precision. When combined with Nexen Group's Poller Pinion System, a true backlash-free solution from the motor to the driven load can be achieved. Machine designers will have up to a 70% reduction in length over standard gearheads, gaining increased space in a design.
Gearheads
Harmonic Gearheads offer true Zero Backlash, high reduction ratios of 50/80/100/120:1, and high load capacity in a very compact package. Gearheads utilize the best cross-roller-bearing technology for the highest rigidity and load capacities.
Linear Motion Control
All Linear Motion Control
Roller Pinion Racks
Roller Pinion Racks
Linear Precision Brakes
Profile Rail Brakes
Rod Locks
UniTrax Linear Axis
UniTrax Linear Axis
Roller Pinion Racks
Nexen Group's Roller Pinion System (RPS) patented rack and roller pinion design maintains high repeatable accuracy with Zero Backlash over longer distances with quieter operation - even at high speeds.
Roller Pinion Racks
Nexen Group's Roller Pinion System (RPS) patented rack and roller pinion design maintains high repeatable accuracy with Zero Backlash over longer distances with quieter operation - even at high speeds.
Roller Pinion Racks
Nexen Group's patented rack and pinion system with bearing-supported rollers engaging two rack teeth simultaneously, allowing for greater efficiency, longer life and outstanding accuracy.
Linear Precision Brakes
Nexen Group's Profile Rail Brakes and Rod Locks are compact and powerful, delivering precision holding and locking.
Profile Rail Brakes
Nexen Group's 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 rail brake clamps directly onto the guide rail to provide positive braking and holding in all axes, with no effect on bearing surfaces
Rod Locks
Nexen Group's Spring Engaged, Air Released Rod Locks offer precision holding with guide rod systems and NFPA or ISO cylinders. A large clamping surface ensures consistent performance, ideal for accurate positioning.
UniTrax Linear Axis
The new prepackaged Motor-Ready Linear Axis delivers high thrust forces and exceptional accuracy in an easy-to-implement design.
UniTrax Linear Axis
The new prepackaged Motor-Ready Linear Axis delivers high thrust forces and exceptional accuracy in an easy-to-implement design.
UniTrax Linear Axis
The UniTrax Motor-Ready Linear Axis combines Nexen’s Roller Pinion System with an integrated rack, profile guide rail and pinion drive carriage assembly. Designed to reduce engineering and installation time, UniTrax delivers precise, reliable linear motion with zero backlash and speeds up to 4 m/s.
Power Transmission
All Power Transmission
Clutches
Friction Clutches
Tooth Clutches
Friction Brakes
Rotary Brakes
Drum Brakes
Caliper Brakes
Friction Clutch-Brakes
Friction Clutch-Brakes
Torque Limiters
Pneumatic Torque Limiters
Mechanical Torque Limiters
Tension Control
Tension Control Brakes
Tension Control Clutches
Web Controls
Clutches
Multiple or single-position tooth clutches are positive engagement devices having open or nickel-plated, enclosed housings. Tooth clutch designs include a pilot-mount version (accepts sprockets or couplings), a flange-mount version that connects to bearing-supported devices and integral sprocket versions. Air-engaged tooth clutches produce up to 60,000 in-lbs. torque. Spring engaged tooth clutches, with up to 72,000 in-lbs. torque, are the ultimate holding device. Single and double-flex couplings, specifically designed for high-torque tooth clutches, are used for inline shaft connections.
Friction Clutches
Nexen Group's single-disc, self-adjusting clutches are mounted on a driving or driven shaft. They cover transmitted horsepower ratings from fractional to 25 hp, torque ratings to 5000 inlb with thermal capacities to 2.5 thermal horsepower, and maximum operating speeds to 3600 rpm. Most are available in Sheave, Pilot, or Coupling Mount versions.
Tooth Clutches
Available in a variety of Single or Multiple Position Models, as well as a Sprocket Tooth design, there are Standard and Metric Models available. Most can be used with a Single or Double Flex Coupling Assembly for in-line coupling applications.
Friction Brakes
Friction brakes have a stationary pad (friction facing) and a rotating wear surface. Common configurations include drum brakes, caliper disc brakes and shaft-mounted brakes with an integral disc and rotor. Friction brakes provide controlled deceleration, stopping, holding, and tension control. Air and spring-engaged versions are available in all brake configurations.
Rotary Brakes
Air or spring-engaged, shaft-mounted friction brakes come with tapered bores to accept QD bushings or straight, bored and keyed-to-size disc hubs. Bushings are available to reduce the size of the standard, straight-bore models. Air-engaged brakes are used for stopping, holding, controlled deceleration, and tension control. Spring-engaged brakes are excellent stopping and holding devices. Multiple sizes provide torque up to 10,000 inlbs.
Drum Brakes
Nexen Group's Drum Brakes are actuated with a diaphragm-sealed actuator that forces a brake shoe on a drum surface to provide the braking torque. Brake drums are bored and keyed to fit standard shafts. The brake shoes are clamped on the outside of the drum to provide brake torque up to 3750 inlbs. Hinge top models offer a convenient feature to change rolls when the brake is used in tension control applications.
Caliper Brakes
Caliper brakes are used in controlled deceleration, cyclic stopping, holding, emergency stops, and tension control applications. Nexen Group offers a wide variety of caliper brake designs, including air actuated/spring-released, spring engaged/air-released, and spring engaged/hydraulic-released models. Several disc diameters up to 24-inches are offered to provide torque up to 50,000 inlbs. Multiple calipers can be used on a single disc to increase torque and accommodate various disc thicknesses.
Friction Clutch-Brakes
Nexen Group's Friction Clutch-Brakes combines the features of a Friction Clutch with a Friction Brake into a single unit. Standard models offer pilot mount, sheave mount and pilot mount with coupling half options. Pilot Mount units are available in various standard bores sizes with customization possible with bushings and couplings.
Friction Clutch-Brakes
Nexen Group's Friction Clutch-Brakes combines the features of a Friction Clutch with a Friction Brake into a single unit. Standard models offer pilot mount, sheave mount and pilot mount with coupling half options. Pilot Mount units are available in various standard bores sizes with customization possible with bushings and couplings.
Friction Clutch-Brakes
Conveniently packaged clutches and brakes for a start and stop applications. Clutch-brake combinations have mounting features that make them adaptable to NEMA and IEC motor frames. All clutch-brakes operate on static air pressure.
Torque Limiters
A torque limiter protects mechanical equipment or its work from damage by mechanical overload. A torque limiter may limit the torque by slipping a friction plate clutch or disconnecting the load entirely. The action of a torque limiter is useful to limit any damage to the machine or product due to mechanical failures or product jams in the machine and is typically installed on the output side of gear reducers to protect the gear set.
Pneumatic Torque Limiters
Nexen’ Group's pneumatically engaged, single-position torque limiters are the best overload protection devices available. The “TL” Series units are ball/detent clutches equipped with overload sensors.
Mechanical Torque Limiters
Nexen Group's Torque Limiters protect the drive and driven components from damage associated with torque overloads caused by material jams, operator error, or various unforeseen reasons that pose a significant threat to machine downtime.
Tension Control
Precise tension control is vital to any web or strip-fed operation, and the product must be fed under tension, processed under tension and wound up again under tension. Tension controllers are an integral part of maintaining this set tension. Nexen tension controllers range from simple systems with diameter feedback (open loop) to dancer control systems and the highest precision systems using web tension sensor feedback (closed loop).
Tension Control Brakes
Nexen Group's Tension Control brakes offer precise control over the full operating range – from the high torque needed to manage a large roll, to the lower torque requirements for more delicate materials and demanding applications.
Tension Control Clutches
Nexen Group's line of Modular Tension Control Clutches is designed to be the most flexible, maintenance-free pneumatic units available for continuous winding operations. Ruggedly built to endure the continuous drag and high heat load that tension control demands, yet extremely sensitive and responsive to a wide range of torque requirements.
Web Controls
Nexen Group's Web Controllers are a closed-loop, load cell-based tension control products which use torque to control the tension of paper, film, foil, or fabric in all zones of web processing machines.
NexSafe® Safety Certified
All NexSafe® Safety Certified
Servomotor Brakes
Servomotor Brakes
Profile Rail Brakes
Profile Rail Brakes
Rod Locks
Rod Locks
Servomotor Brakes
Nexen Group's Spring Engaged, Air Released Servomotor Brakes are available safety certified to comply with international safety standard ISO 13849-1. Category Level up to 4 and Performance Level up to e, can be achieved using NexSafe® products in recommended configuration.
Servomotor Brakes
Nexen Group's Spring Engaged, Air Released Servomotor Brakes are available safety certified to comply with international safety standard ISO 13849-1. Category Level up to 4 and Performance Level up to e, can be achieved using NexSafe® products in recommended configuration.
Servomotor Brakes
Nexen’s Spring Engaged, Air Released Servomotor Brakes are available safety certified to comply with international safety standard ISO 13849-1. Category Level up to 4 and Performance Level up to e, can be achieved using NexSafe® products in recommended configuration.
Profile Rail Brakes
Nexen Group's Rail Brakes Series of linear profile guide rail brakes uses spring force to secure the load in holding applications. Superior response time, high force for stopping and holding in e-stop and power-off situations. Each Rail Brake clamps directly onto the center of the guide rail to provide positive braking and holding in all axes, with no effect on bearing surfaces. These profile rail brakes hold position accurately by reducing drive train backlash and elasticity.
Profile Rail Brakes
Nexen Group's Rail Brakes Series of linear profile guide rail brakes uses spring force to secure the load in holding applications. Superior response time, high force for stopping and holding in e-stop and power-off situations. Each Rail Brake clamps directly onto the center of the guide rail to provide positive braking and holding in all axes, with no effect on bearing surfaces. These profile rail brakes hold position accurately by reducing drive train backlash and elasticity.
Profile Rail Brakes
Nexen Group's Spring Engaged, Air Released Rail Brakes are safety certified 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® products in recommended configuration.
Rod Locks
Nexen Group's Static Rod Locks deliver precision holding with virtually no backlash, providing high accuracy in demanding applications. These spring-engaged, air-released units come in both ISO and NFPA sizes. The Rod Lock’s large clamping surface ensures high clamping/holding force, and Nexen offers models for use on a pneumatic cylinder or as a stand-alone unit on a guide rod. The design is sealed and features a natural brushed aluminum finish or a corrosion-resistant, anodized finish.
Rod Locks
Nexen Group's Static Rod Locks deliver precision holding with virtually no backlash, providing high accuracy in demanding applications. These spring-engaged, air-released units come in both ISO and NFPA sizes. The Rod Lock’s large clamping surface ensures high clamping/holding force, and Nexen offers models for use on a pneumatic cylinder or as a stand-alone unit on a guide rod. The design is sealed and features a natural brushed aluminum finish or a corrosion-resistant, anodized finish.
Rod Locks
Nexen’ Group's Spring Engaged, Air Released Rod Locks are safety certified to comply with international safety standard ISO 13849-1. Category Level up to 4 and Performance Level up to e, can be achieved using NexSafe® products in recommended configuration.

With superior performance, these spring-engaged, air-released units supplement air cylinders and guide rods for holding in power-off/e-stop situations. High clamping forces ensure positive holding with minimal air required for release.
Accessories
All Accessories
Pneumatic Control Accessories
Pneumatic Control Accessories
Linear Couplings
Linear Couplings
Pneumatic Control Accessories
Nexen offers a number of Pneumatic Accessories for our line of products.
Pneumatic Control Accessories
Nexen offers a number of Pneumatic Accessories for our line of products.
Pneumatic Control Accessories
Nexen offers a number of Pneumatic Control Accessories for our products that allow for easy connections, servicing, and trouble-free performance.
Linear Couplings
Nexen Group's Linear Couplings protect valuable equipment by controlling misalignment in linear motors, ballscrew actuators, pneumatic cylinders, and rods or sensors.
Linear Couplings
Nexen Group's Linear Couplings protect valuable equipment by controlling misalignment in linear motors, ballscrew actuators, pneumatic cylinders, and rods or sensors.
Linear Couplings
Nexen Group's Linear Coupling help prevent binding or premature wear, providing Zero Backlash misalignment control between linear actuators, ballscrew actuators, pneumatic cylinders, and rods or sensors.
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Caliper Brake Disc Without Hub

Product Number 855900 Product Family FCDB/F450/FW

Name: Caliper Brake Disc Without Hub
SKU: 855900

Caliper Brake Disc Without Hub

Description

FWCDB*CALIPER DISC,10.000 OD

Product Features

Non-Ventilated, Disc Without Hub Only

Stock: In stock

WARNING: California Proposition 65

WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov

Important Details

Application Considerations: 0.25 Inch Thick, Non-Ventilated, Disc Without Hub, For DB And DBSE Calipers
This Disc Can Be Added To Certain Air Champ FW OR F450 Clutches To Create A Driven Shaft Mounted Clutch-Brake

Have a question about a product or application? Contact our Engineers

Specifications

Specifications
Weight	4.7 lbs
Max Speed	4500 RPM
Shaft Inertia	62.65 lbin²
Primary Finish	Black Oxide
CE Certified	CE
RoHS Compliant	RoHS
IEC IP Rating	0
Bore Details	Straight
Brake Heat Sink Capacity	75900 ftlb
Materials Of Construction	Black Oxide

Dimensions

Dimensions
Bore Size	No Hub, Disc Only
Disc Thickness	0.23 in
Disc Diameter	10 in
Disc Working Radius	DB=4.250 in

Notes

Notes
Product Features	Non-Ventilated, Disc Without Hub Only

Accessories

Caliper Brakes

Caliper Brakes for product #855900

Catalog product list
	Product Number	Product Description	Model	Primary Finish	Disc Thickness	Inlet Size	Engagement Method	Brake Facing Type	Brake Facing Edge Color Code
Thumbnail	835001	Air Engaged Caliper Brake	DB	Black Oxide	0.250 in	0.125 NPT	Air	Low Coefficient	Green
Thumbnail	835000	Air Engaged Caliper Brake	DB	Black Oxide	0.250 in	0.125 NPT	Air	Standard Coefficient	Red
Thumbnail	835071	Air Engaged Caliper Brake	DB	Black Oxide	0.250 in	0.125 NPT	Air	Standard Coefficient	Red
Thumbnail	835007	Air Engaged Caliper Brake	DB	Black Oxide	0.250 in	0.125 NPT	Air	High Coefficient	Purple
Thumbnail	835009	Air Engaged Caliper Brake	DB	Black Oxide	0.500 in	0.125 NPT	Air	Low Coefficient	Green
Thumbnail	835030	Spring Engaged Caliper Brake	DBSE	Black Oxide	0.250 in	0.125 NPT	Spring	High Coefficient	Purple
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Rotary Motion Control

Rotary Indexers

Rotary Indexers

Rotary Indexers

Roller Pinion Gears

Geared Bearings

Gears

Precision Brakes

Ball Screw Brakes

Shaft Brakes

Servomotor Brakes

Electric Servomotor Brake

Gearheads

Gearheads

Gearheads

Roller Pinion Racks

Roller Pinion Racks

Roller Pinion Racks

Linear Precision Brakes

Profile Rail Brakes

Rod Locks

UniTrax Linear Axis

UniTrax Linear Axis

UniTrax Linear Axis

Clutches

Friction Clutches

Tooth Clutches

Friction Brakes

Rotary Brakes

Drum Brakes

Caliper Brakes

Friction Clutch-Brakes

Friction Clutch-Brakes

Friction Clutch-Brakes

Torque Limiters

Pneumatic Torque Limiters

Mechanical Torque Limiters

Tension Control

Tension Control Brakes

Tension Control Clutches

Web Controls

Servomotor Brakes

Servomotor Brakes

Servomotor Brakes

Profile Rail Brakes

Profile Rail Brakes

Profile Rail Brakes

Rod Locks

Rod Locks

Rod Locks

Pneumatic Control Accessories

Pneumatic Control Accessories

Pneumatic Control Accessories

Linear Couplings

Linear Couplings

Linear Couplings

Product Number 855900 Product Family FCDB/F450/FW

Caliper Brake Disc Without Hub

Description

Product Features

Price and Delivery are Subject to Change

For Same Day Shipments

WARNING: California Proposition 65

Resources

Important Details

Have a question about a product or application? Contact our Engineers

Specifications

Dimensions

Notes

Caliper Brakes for product #855900