Coupling - technical
Backlash
- rotational "free play" or "lost motion"
- clearance between mating components
- similar to backlash in a set of gears
- measured in degrees(°), arc-minutes, or amount of radial play at the outside diameter of coupling
Torsional Stiffness
- rotational “wind-up” that occurs when a coupling is subjected to torque.
- similar to a torsional spring
- torsional stiffness is actually a measurement of the torsional spring rate of the coupling.
- measured in in-lbs/degree, N-m/rad, etc.
Backlash & Torsional Stiffness
Important factors to consider for:
- Precise positioning
- Reversing applications
- Applications with frequent acceleration / deceleration
- Applications with large inertia present
Types of misalignment
Parallel
- Measured in inches (in) or millimeters (mm)
- Single-Flex CD Couplings allow for small amounts of parallel misalignment
- Double-Flex CD Couplings allow for very large amounts of parallel misalignment
Angular
Measured in degrees (°)
Axial
Measured in inches (in) or millimeters (mm).
Dynamic misalignments
An application may have any combination of the afore mentioned misalignments.
ZERO-MAX Uses a laminated composite material for the flexible member from Glass-Fiber / Epoxy matrix which combines the best features of steel disc coupling and elastomeric coupling!
