One Way Indexing Backstopping Holdbacks Clutch Fhb/Llh/HSB

 


HSB Series
HSB units are intended for use as backstops on the high speed shaft or intermediate shaft of reducers and as holdbacks on the headshaft of conveyors. They use standard FSO Series clutches with the addition of an oil reservoir made from an aluminum casting with cooling fins. HSB models are designed to permit free oil flow between clutch and reservoir to provide increased cooling capacity and increase backstop life.
FHB Series
The FHB backstop is mounted on a through-shaft with its inner race driven by a key, and its integral outer race torque arm prevented from rotating through a clearance fit interface with a fixed reaction pin. The reaction pin may also be used to provide axial restraint of the backstop on the rotating shaft. Typical uses for the Model FHB backstop include inclined conveyors, bucket elevators, and other applications where a rotating shaft must be absolutely prevented from rotating in a reverse direction, as commonly found in mining, aggregates, material handling, and other industries. The high speed capability of the unit make this backstop ideal for mounting on double extended input shafts of gear reducers. The overrunning speed of the rotating shaft should be greater than 400 RPM to assure C/T Sprag "lift-off".
 
LLH Series
Formsprag Long Life Holdbacks (LLH) are designed for use on conveyor headshafts, bucket elevators, pumps, or any other machinery where reverse rotation must be positively prevented. LLH holdback clutches are ready to install. They are equipped with a one-piece, quickly detachable torque arm and grease labyrinth protected oil seals that positively prevent airborne contaminants from reaching internal seals and parts. Oil lubricated, the clutch assembly also includes an oil sight gauge with filter breather for ease in checking lubricant level.
 


SBI Series
SBI Series In-line Mounting Ball Bearing Supported clutches are comprised of an HPI clutch with an extended shaft (inner race) for in-line mounting. The extended shaft provides a convenient way to mount a coupling to accommodate the misalignment in the in-line application. This design is intended for applications with medium to heavy-duty indexing requirements. They are oil lubricated and equipped with lip type seals. Grease is available. Increased overrunning speeds are possible with clutches having steel labyrinth grease seals.
SB Series
 
SB Series In-line Mounting Ball Bearing Supported clutches are comprised of an FSO clutch with an extended shaft (inner race) for in-line mounting. The extended shaft provides a convenient way to mount a coupling to accommodate the misalignment in the in-line application. This design is intended for applications with light to medium indexing requirements. They are oil lubricated and equipped with lip type seals. Grease is available. Increased overrunning speeds are possible with clutches having steel labyrinth grease seals.
 
RL Series
 
Available in six sizes, the Formsprag RL Clutch is a sprag type no-back which permits transmission of driving torque from input to output shaft in both directions of rotation, but restrains any feedback torque of the driven load from rotating the output shaft in either direction. The RL Clutch is extremely simple in design and has a minimum number of moving parts. The outer race diameter is the same size as standard bearing dimensions, thus simplifying mounting and providing maximum strength in the assembly.
 
HPO Series
The HPO series is especially designed for high speed outer race overrunning appliations, such as high speed dual drives or standby drives. HPO clutches are grease lubricated and equipped with labyrinth seals. Formchrome® sprags and special retainers are incorporated for maximum service life and speed capability. These clutches mount on a through shaft, with the inner race driven by a key. The ground O.D. of the outer race is designed as the mounting surface for attaching parts and is concentric with the bore. Tapped holes are provided in each end of the outer race for securing parts to the clutch.
 
FS-100, 200, 300 Series
 
Generally used as an indexing clutch where a compact package is desired. A snap-ring bearing must be inserted before installing. An adequate seal or cover must be provided at the open end to retain lubricant. Shaft end must be turned down and threaded to accommodate bearing and lock nut.
 

MOUNTING EXAMPLE


Description
Types FSO 300 to 700 are sprag type freewheels self contained, sealed and bearing supported, using two ball bearings. Units are delivered oil lubricated according to the type.
It is a Formsprag USA design with a "full sprag complement" that gives a very high torque for a given diameter.
Any overload is resisted by a sprag to sprag abutment, avoiding a sprag tilt over.
Type FSO is oil lubricated and uses standard shaft lip seals.



Applications of one way clutch bearing:
 
 
Air cleaning plants; Gear Reducers , Conventional and Nuclear Power Plants,Agricultural machines; Automotive Industry, Clay Pigeon Traps , High Voltage Switchgear, Buchet elevators; Compressors; Conveyors; Cranes and hoists; Dry cleaning machinery; Duplicator equipment; Fish net machines; Heat-treatment furnaces; Induced draft fans; Multi-states conveyors; Packaging machinery; Printing machinery; Pumps; Punch presses and feeders; Power plants; Refinery equipment; Speed reducers; Standby power units; Textile looms; Two-speed grinders; Two-speed shiftovers; Washing machines; Wire winding machinery. Rolling Mills, Roller Coaster, Fitness Machines, Industrial Fans, Vertical Pumps
 
 
Gear Reducers

Here one-way clutches are used as integral backstops in drive systems for conveyors, industrial fans, pumps, crushers, mixers, kilns and turbines. One-way clutches are also widely used as overrunning clutches in auxiliary or pony drives and dual-drive systems.we offers solutions for long life and maintenance free operation.
 
 
Printing Machines

The classic application in printing machines is the inking roller auxiliary drive. But one-way clutches have also been used extensively as indexing devices, to provide an inexpensive and reliable means of achieving a mechanical variable speed drive for the inking roller main drive.
We know-how results in inexpensive, customised solutions even for the most demanding applications.
 
 
Conventional and Nuclear Power Plants

R&B backstops are used extensively on pumps used in the primary and secondary cooling systems of power generating equipment. R&B is certified to KT 1401 as an authorised supplier for the nuclear power industry.
 
 
 
Textile Machines

There is a wide range of applications for R&B clutches in textile machinery, especially in circular knitting machines, thread preparation, bobbin winding and looms. In applications using sprag clutches the special Formchrome finish used in our ball bearing series of one-way clutches offers an exceptionally long life in overrunning applications.
 
 
Automotive Industry

There is a wide range of applications in the automotive manufacturing sector. Overrunning clutches on conveyor systems and engine test bed starter mechanisms, exhaust fan backstops in spray painting booths. The multiplicity of designs offered by R&B offers the designer the best opportunity to achieve the perfect "fit".
 
Clay Pigeon Traps

In this common application a one-way clutch is used as a backstop to prevent the arm of the trap "bouncing" back after a launch. The rugged R&B roller-ramp design provides a reliable solution for this demanding but price sensitive application.
 
 
 
High Voltage Switchgear

Here a one-way clutch is used as a backstop to secure the actuating spring pre-load position. The quality and reliability of the chosen R&B product ensures instantaneous applied torque and a firm "latch".
 
 
Agricultural Machinery

On seed drills a series of one-way clutches is used as an indexing mechanism to provide an infinitely variable speed drive. One-way clutches are also used for overrunning on round bale presses and as backstops for bulk conveyors and silo extractors. R&B ball bearing series sprag clutches and self-contained designs offer simple and effective solutions for many applications in this industry.
 
 
Car Washing Gantries

To avoid damage to vehicles in the event of a drive system failure car washes use overrunning clutches in the horizontal roller drive. R&B ball bearing series and self-contained roller-ramp designs can be very easily incorporated into chain sprockets, timing belt pulleys and other drive elements.
 
 
Rolling Mills

In the steel, and other metals industry one-way clutches are used as overrunning drives in roller conveyors. The speed of the conveyed material can momentarily be accelerated without any effect on the main drive.
 
Fitness Machines

R&B ball bearing clutches have proved dependable and durable in the flywheel assembly of superior quality rowing and stepper machines and novel drive systems in bicycles and manually operated wheelchairs.
 
Davits (Winches)

R&B one-way clutches are used in combination with brakes to ensure the safe lowering and raising of rescue vessels on ships and off-shore platforms. New industry wide standards are satisfied by R&B design and manufacturing quality.
 
 
Bow Thruster

R&B one-way clutches are used as backstops to prevent reverse rotation of the thruster's propeller when not in operation. Units with centrifugally disengaging sprags offer a solution that can be easily incorporated into the drive gearbox and, under drive conditions, operate contact free to ensure a very long operating life.
 
Industrial Fans

One-way clutches are frequently used in multiple fan installations to prevent non driven fans from "windmilling" in the reverse direction.
 
Vertical Pumps

Large vertical pumps used in power generating plant cooling systems and for flood control frequently employ a backstop. Larger versions of the R&B high speed backstop are ideal for these applications and may be mounted on the top of the pump or the electric motor.