Product
Elastic Spiders
An elastic spider (jaw-coupling insert) is a star-shaped elastomer element fitted between two toothed coupling hubs, transmitting torque between two shafts while its lobes flex to absorb misalignment and shock.
Overview
How it works
The spider's lobes sit compressed between the jaws of two facing hub halves. As torque is transmitted, the lobes are loaded in compression rather than shear, which is what lets the coupling absorb angular, parallel and axial misalignment between the two shafts, along with cushioning torque shocks and vibration that would otherwise be transmitted straight through a rigid coupling.
Profiles
Available profiles
GR
Elastomer coupling insert profile.
GS
Elastomer coupling insert profile.
MT
Elastomer coupling insert profile.
SBT
Elastomer coupling insert profile.
H
Elastomer coupling insert profile.
Flender
Elastomer coupling insert profile.
Materials
Which compound, and why
Polyurethane (PU)
The standard spider material — high tensile strength and abrasion resistance for continuous power-transmission duty.
NBR
A softer, lower-cost alternative where shock absorption matters more than maximum torque capacity.
Applications
Where used
Shaft and jaw couplings in general engineering and hydraulic power-transmission applications — pumps, motors, gearboxes and conveyor drives.