Fixtures are not minor accessories in insulator mechanical testing. The connection between the sample and machine decides whether load is transferred correctly during tensile, cantilever or torsion tests.
A quotation that lists load capacity but does not define fitting adapters is incomplete for serious laboratory planning.
Source facts used
- CTLWN500 specification includes fitting connection with ball and socket style connection.
- Valid tensile test length is 2000mm.
- Maximum tensile load is 300kN, cantilever load is 20kN and torsion load is 5kN·m.
- Computer control and programmable test procedure are included.
Start with actual fitting drawings
Ball-socket, tongue-clevis, flange, eye and custom fittings require different adapters.
Even when a brochure lists ball and socket connection, the buyer should still confirm dimensions and load direction.
Alignment controls result quality
Poor alignment creates secondary bending during tensile tests and distorted moment arms during cantilever tests.
Fixture design should be reviewed together with sample length and load rating.
One fixture family may not cover all tests
Torsion needs torque transfer; cantilever needs stable side-load application; tensile needs axial alignment.
Separate fixture drawings reduce ambiguity before manufacturing.
Buyer checklist
- Fitting drawing
- Load direction
- Adapter type
- Alignment method
- Sample length
- Safety protection
FAQ
Should fixtures be included in quotation?
Yes. Buyers should know which fixtures are standard and which require customization.
Can one adapter cover all products?
Usually only within a similar fitting family. Different products often need different adapters.
Need a practical recommendation? Send product drawings, voltage class, test standard, sample size and destination country through the Contune contact page.