Couplings & Drive Shafts
Steel Geared Coupling
Steel Geared Couplings for High Torque Transmission in a compact space in either Continuous Sleeve or Flanged designs
Wide range of steel geared couplings for torque ratings up to 24900Nm in either a Full-Flex or Flex-Rigid hub arrangement. Also available as a Spacer Coupling (Cardan Shaft) design.
Useful Information
Continuous Sleeve Coupling Features
- High transmittable torque ratings
- Full-Flex and Flex-Rigid design available
- 8 Sizes
- Torque ratings from 285Nm to 20800Nm
- Coupling Outer Diameter from 84mm to 240mm
- Bore sizes up to 130mm
- Vari-crown tooth form for improved torque transmission and longer life
- Strong compact design
- Low inertia and high maximum speeds
- Spacer couplings (Cardan Shaft) available on request
Flanged Coupling Features
- High transmittable torque ratings
- Full-Flex and Flex-Rigid design available
- 7 Sizes
- Torque ratings from 860Nm to 24900Nm
- Coupling Flange Outer Diameter from 116mm to 318mm
- Bore sizes up to 147mm
- Hidden and exposed bolt designs available
- Vari-crown tooth form for improved torque transmission and longer life
- Strong compact design
- Low inertia and high maximum speeds
- Spacer couplings (Cardan Shaft) available on request
Selecting the Right Coupling
The selection of coupling type depends on the installation and the type of misalignment. The three main types of misalignment encountered are:-
– Angular Misalignment is usually present to some extent on all applications, typical values 1° – 2°. Sometimes higher values are necessary
– Parallel (Radial) Misalignment is also nearly always present. A well aligned installation might have values below 0.25 mm
– Axial Misalignment (End Float) sometimes caused by thermal expansion or as a result of machine design
Other considerations include:
– Backlash Free Couplings are either one part couplings or have bolted joints. These are effective for precise positioning and to avoid wear on reversing drives.
– Torsional rigidity of couplings depends on the joining method. Types with rubber or plastic elements can be considered as torsionally soft and will have an amount of twist at rated torque.
Procedure:
– Decide if the coupling should be torsionally soft or rigid.
– Consider whether a small amount of backlash is acceptable.
– Calculate the required coupling torque.
– Make a provisional selection.
– Check that the coupling’s maximum speed is sufficient.
– Check that the coupling’s dimensions are acceptable.
Notes:
– Maximum misalignment values are extremes and should not be combined. As operating misalignment approaches the maximum, torque and power ratings should be reduced to maintain life
– The maximum axial misalignment values apply when the coupling is aligned. If axial misalignment greater than the listed maximum is required, consult Power Jacks
– The inertia values includes shafts through the bores
– When ordering please quote the coupling size and type, specify the bore and keyway sizes, and advise if puller holes or set-screws are required
– For maximum performance the screw jacks, actuators, gearboxes, motors and shafts should be carefully aligned
– Imperial (Inch) couplings on request
Contact Power Jacks with your order or technical enquiry
