One way clutch (Freewheels) : The application of clutch is for economic solution, to reduce the cost compared with separately controlled couplings/breaks, ratchet arrangements etc. in some design, Clutch is preferred to conventional solutions because of its advantages in operating safety & better automatization. No Driving Contact between inner & outer ring. While in rotation, in one direction and driving contact between inner & outer ring, which transmit torque in the other direction of rotation. These Clutches should never be dismanted at users end. To minimize critical stresses in keyway area of inner ring keyeways have radius instead sharp corner, hence the keys must be chamfered on their edges.
The functions of clutches :Indexing / Feeding : is to convert mtion either from a continuously rotating shaft on intermittent basis OR by converting the reciprocating linear motion of a Pnewmatic / Hydraulic cylinder into an intermittent rotary motion. The rotary motion of the drive shaft is converted into an intermittent rotary motion by means of a hold pin and connecting rod attached to arm of the freewheel whose arc of index can be varied as required by adjusting slot. Especially when clutch is used as a indexing clutch, the key connections must be free from play. The best indexing application is reached with unalloyed oils with alow degree of viscosity.
Overruning : The inner ring can rotate faster than the outer ring in same direction of rotation of input and if input is stopped inner ring continues to rotate at input speed and vice versa e.g. if a large motor or turbine has to be run up to speed, by slow speed starter motor, the use of a freewheel between these elements enables the starter motor to be shut down without any mechanical involvement. If a freewheel is interposed in a drive between a gearbox / a large machine, the freewheel prevents any back drive OR damage to gearbox if at all any power failure in this function. If the direction of force / rotation changes, there will be automatic obstruction of connection between the component(s) and coupled machine.
Backstopping / Holdback : The Purpose of backstopping is to providing a return Or reverse lock. This smoothly permits rotation of the drive shaft by overrunning in one direction but immediately locks if the shaft attempts to Go on reverse, such as in inclined conveyors, elevators etc. in case of power failure OR motor is switched off, to avoid the conveyor load from running back.
Lubrication : Most clutches especially indexing and clutches with high speed overrunning are provided with unalloyed, acid free, low viscocity oil. Oil must be changed initially after about 80 operating hours & there after approximately 1500 operating hours, depending on the environment, refilling upto ½ level.The freewheels are manufactured in different types 1.Spran 1.1 Standard 1.2 indexing 1.3 Centrifugal lift off 2. Roller 3. Sprag roller combined.Standard / Indexing sprag type clutches are supplied with / without bearing support / innerring, duly oil / grease filled ready for installation, for high torque transmission. For indexing accuracy inner ring & bearing support is a must.Centrifugal lift off sprag type clutches are supplied without bearing for backstop, where high speed overrunning function required.Roller type clutches are supplied with Or without bearings, for light / medium torque transmission.Sprag Roller combined type clutches generally without bearings for backstopping & indexing such as in fishing net machinery.For mounting, clutches provided with tapped holes on face OR with flanged outer diameter with clear holes OR with lever arm, OR keyslot in on face/outer diameter.Before putting into operation, please check proper lubricant level.
APPLICATIONS : in all industries. Agricultural Machines. Fertilizer spreaders Straw Presses, Feed Cutters, Tractor Distribution Gear, Plant Sprayers)Air Craft Power Transmission Unit. Gernerator Construction-Cement Mixtures, Barrel Mills, Drilling Rigs) Drying – Furnances, continuous Ovens, Food – Bottling Corking & Dossing Machines. General Drives – Electric Motors, Worm Drive gearbox, Hoisting & Conveying device- Elevator Drive, Bucket Conveyor, Screw Pumps, Leather – Tanning & curing , Drying & Sewing , Machine Tools – Presses & Shapers, Packaging, Paper & Printing – Tube filling, wripping, Labeling, Paper Production, lnking & Feed Rollers. Power Plant : Turbine Starter, Blower, Pumps & Compressors, Vaccum Pumps, Turbo Compressors, Rubber & Plastic Injection Moulding Textile- Blow Room Machinery : Double rib & Jacquard Loom, Circulat & Flush stich machines, Wire processing Fishing Net Machinery.The specifications sheets on selected models with technical data can be provided on request.
Remark : The specifications given in our leaflets are based on continued modifications & Decades of trials taken. Some times under certain field condition there may evolve unknown parameters & conditions effecting the value of our technical data. Therefore we suggest a functional test is to be carried out if implementing for the first time / OR compare with your existing freewheel.The specifications sheets on selected models with technical data can be provided on on request.