Couplings are an essential part of power transmission. They are used to connect the two shafts. They are of three types – the full gear coupling, half gear couplings, and the brake drum couplings.
Full gear couplings
Construction consists of a pair of identically toothed hubs along with a pair of identical flanged sleeves. These have internal teeth and a set of bolts, nuts, lock washers, lube plugs, oil /grease retaining seals over the hubs and a gasket.
Some of the notable features include:
- Less backlash and compact assembly
- Large bore capacity
- Up to 1200 C usage is possible
- High power to weight ratio.
- Angular, parallel and axial misalignments can be handled
- With proper grade of grease, usage can be extended to high-temperature conditions.
Also, nomenclature of the gear is as follows :
- Forged hubs with external teeth and forged sleeves with internal teeth
- Flanged gasket
- Lubricating plug
- Close tolerance connecting bolts
Depending upon the load size, different varieties of drives are available. Depending on your need, we can get the best set of full gear couplings for you.
Half gear couplings
Construction is similar to that of full gears except for a single piece of the toothed hub and flanged sleeves. They also contain internal teeth and a set of bolts, nuts, lock washers, lube plugs, oil /grease retaining seals over the hubs and a gasket.
Features of half gear are similar to that of full gear with slight changes:
- Used primarily with floating shaft assembly
- Parallel misalignment cannot be accommodated
- Widely used for cross traverse and along travel line shaft drives.
Selection procedure is based completely on the service factor table stated below. Multiply by the running power by the given service factor. We get the design power (rpm). Convert to power at 100 rpm. Use this for selecting the appropriate coupling.
Also refer to the rating table and read until power greater than or equal to design power at 100 rpm is found. The first column gives the appropriate coupling size. Go for higher size if required bore size is greater than the corresponding size of your previous selection.
Brake drum couplings
Some of the important features are:
- Interchangeability along with high torque
- Fastener design – better than before
- Lubrication system with improvements
- Higher misalignment capacity
- A high bore capacity
Standard brake drums can take misalignments In both angular and parallel manner. They can also bear end float pressurizing the adjacent bolts with axial loads. The exposed design of bolt allows usage of either open end or socket wrenches making it a preferred design for industrial application of all sorts. These are the ideal choice for fans, overhead cranes, steel, cement, power plants, conveyors, and paper mill equipment. |