b's PrinGt estF ixturesStarrett offers custom solutions for testing compression and extension springs. These test fixtures ensure correct axial alignment and promote accurate testing and measurements of spring constants, initial tension, free length and more.o PerationStarrett can supply a variety of test fixtures for testing compression and extension springs. Generally, fixtures include hooks for extension springs and various forms of custom-made test fixtures for compression springs.t estinGs tandardsixtureS pringThere are a variety of testing methods for springs and washers. Contact your Starrett representative for more information about your specific testing method and the available test fixtures.s PrinG F S STEEL, NICKEL FINISH For general-purpose spring testing applications Springs are positioned over the center rod to ensure proper alignment during compression Operating Temperatures 32 to 158F (0 to 70C)Shown:Custom made testing fixtures for compression springs having different free lengths.Spring FixturesLoad Capacity Inside Diameter (A) Outside Diameter (B) Weight (each) Clevis TypeModel No. N KGF LBF in mm in mm lbs kgs mm SupplySPRING-[A]-[B] 100 10 22 A A B B TBD TBD 15.9 1Note: This fixtures are custom made and based on the spring inside diameter. Please consult your Starrett representative.d iMensions 15.982B60A 0.38B607540152'