ROMAFLEX pin bush type flexible couplings provide reliable means of mechanical power transmission giving a positive and cushioned drive protecting against unavoidable misalignment and help in reducing wear and tear of the connecting parts. The coupling absorb shock loads, torsional vibrations and take all forms of misalignment: angular; offset and angular offset including axial float of shafts. The coupling are made out of high grade Cast Iron, power transmitted from one half to other through steel pins precision machined passing through specially bonded rubber bushes. The elastic properties of rubber bushes enable the coupling to take shock loads, torsional vibrations and misalignment
ROMAFLEX couplings can be operated in either direction require no lubrication and are unaffected by water, dust and atmospheric conditions.
The couplings are easy to assemble and give year of trouble free life with minimum maintenance
Advantages for Flexible Pin Bush Couplings
- Robust Design
- High Flywheel Moment values
- Easily replaceable flexible elements i.e.
rubber bushes
- Provides Resiliency in the system against
shocks, surge loads
- Low Maintenance
- Can absorb various misalignments viz.
Angular, Parallel, Combined Angular-
Parallel including End-Float of shafts
Versions Available
- Brake Drum Type
- Vertical Type
- Extended Hubs Type
- Cordon Shaft Type
Roma make resiflex resilient coupling essentially consists of a grid spring connecting two hubs mounted on driving and driven shafts.
The grooves are cut axially on the outer surface of the hubs and the grid spring runs through the grooves to from a series of resilient bridges. The grooves are flared outwards to give the spring-members long flexible spans at normal loads. The un-flared portion of the groove in the central area provides increasing support to the spring-members under overload condition. The stiffness of the spring (and therefore of the coupling) depends on the unsupported length of each flexible span and varies with every variation in torque. As a result the coupling stiffness changes at every instant during a vibration cycle. A powerful detuning action is produced which continuously alters the torsional vibration frequency and prevents a build up of resonance in the system.
The driving and driven hubs are generally keyed to the connected shafts or shrunk fitted and are totally enclosed in a shell filled with grease or oil depending on the speed of operation. The shells are flanged and bolted either in horizontal plane or vertical plane
Advantages for resilient couplings
- High torque / weight ratio
- Low weight
- Low moment of inertia values
- Provides resiliency in the system against
Shocks, surge loads
- Low maintenance
- Can absorb various misalignments viz.
Angular, parallel, combined angular-
Parallel including end-float of shafts
Versions available
- With vertical axially split bolted flanges
- With horizontal axially split bolted
Flanges
- Spacer type
- Brake drum type
- Extended hubs type
- Cardan shaft type
ROMA make GEARFLEX standard double engagement type gear toothed flexible coupling consists of two gear hubs, two outer flanged geared sleeves, a set of bolts, grease nipples and O rings. The external teeth of the hubs engage with the internal teeth of sleeves are bolted together thus making the unit a complete coupling.
The flexibility in the coupling is provided by specially designed gear teeth configuration which makes the coupling self-aligning duration operation.
The geared hubs are made out of tested forged steel and flanged geared sleeves are made out of tested forged steel or graded cast steel depending on the size and requirements. The teeth are generated and are involute from. The bolts are made out of high tensile steel and precision machined. The O rings are made out of specially bonded rubber to withstand compression and of adequate hardness for a long life.
The sleeves and hubs are heat treated to hardness of 240-280 BHN to provide wear-resistance properties for longer life of the couplings.
For standard ROMA make GEARFLEX couplings the lubrication is provided by Grease which penetrates the tooth contact area to form a thin layer of lubricant to minimize the friction. The grease is injected through grease nipples and is retained by O rings provided on both sides.
OPTIONAL SEALING:
On specific request, ROMA make GEARFLEX couplings are provided with alternative sealing like felt seals, oil seals, detachable sealing arrangement with or without pressure plate etc.
OIL LUBRICATION:
In case of lubrication by oil, the Couplings are provided with Oil-Plugs.
Versions Available
- Double Engagement Type
(Full Geared)
- Single Engagement Type
(Half Geared-Half Rigid)
- Mill Motor Type
- Spacer Type
- Brake Drum Type
- Vertical Type
- Disengaging Type
- Continuous Sleeve Type
(Without Bolted Flanges)
- Extended Hubs Type
- Shear Pin Type
- Spindle Type
- Cordon Shaft Type
Advantages for Gear Couplings
- High Torque / Weight Ratio
- Low Moment Of Inertia values
- No Wearing Part during misalignment of
connected shafts
- Low Maintenance
- Can absorb various misalignments viz.
Angular, Parallel, Combined Angular- Parallel
including End-Float of shafts
ROMAFLEX Brake Drum couplings serve dual purpose of flexible coupling as well as providing brakedrum for mounting brake within the same space. The coupling can be used with all kinds of brakes with shoes; Electromagnetic, Thruster, Band etc.
The material of the couplings is high grade Cast Iron, Power transmitted from one half to other through steel pins precision machined passing through specially bonded rubber bushes. The elastic properties of rubber bushes enable the coupling to take shock loads, torsional vibrations and misalignment.
The units can be operated in either direction require no lubrication and are unaffected by water, dust and atmospheric conditions.
NOTE: - Non-standard brakedrum size also available. Kindly refer to us for details.
Advantages for Flexible Pin Bush Couplings
- Robust Design
- High Flywheel Moment values
- Easily replaceable flexible elements i.e.
rubber bushes
- Provides Resiliency in the system against
shocks, surge loads
- Low Maintenance
- Can absorb various misalignments viz.
Angular, Parallel, Combined Angular-
Parallel including End-Float of shafts
