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Coupling adapters
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1. Insert the adapter into the base beam, noting the orientation of the locating pin or
pins on the bottom of the adapter. There are a number of locating pin holes on the
base beam to allow for different orientations of the base adapter.
2. Insert a 5 mm hex key into the base adapter, ensuring that it fits into the screw at the
base of the adapter.
3. Use the torque wrench to tighten the screw to 6 Nm (4.4 ftlb).
4. Remove the hex key and insert the compression spring.
Coupling adapters
Coupling adapters let you attach grips and fixtures of different sizes to the load cell and
base adapter, providing more options for testing. There are two primary types:
• For tension testing only:
Tension coupling adapters, also known as self-aligning coupling adapters, which
provide a swivel connection and connect between clevis pin type interfaces. The
swivel action allows the grip or fixture to self-align in the direction of the test load,
thus minimizing any bending load on the specimen.
• For tension or compression testing:
Rigid coupling adapters which also connect between clevis pin type interfaces but
use check nuts to provide fixed connections. This type can also have a threaded
interface. These couplings are not self-aligning and the load string alignment is
dependent on the accuracy of load cell alignment during installation.
When assembling the load string, you may need to use adapters if the load cell
interface, or base adapter interface, differs from your grip interface. A coupling adapter
creates a secure connection between these two different interfaces.
If your grip or fixture interface is the same size as your load cell interface, then you can
connect these directly and you do not need an adapter. If, however, you need the self-
aligning feature that the adapter offers, you should use the appropriate self-aligning
coupling adapter.
Coupling types are listed from the load cell towards the accessory or from the frame
base towards the accessory. For example, if you need to connect a load cell with a Type
D (female) connector to a grip with a Type O (male) connector you require a Type Dm to
Of adapter.
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