Disc springs test (Inner diameter higher than 26mm)

This video shows the procedure to test a disc spring in a HOYTOM testing machine, which has a special tool for that.

[@magacinmagacin1523]

Hello, one question, our compani have this machine, but how u get L1 to 5.5 mm ? We try this as u show in video but we cant fill in that data, it's stay on 0.00? And one more question, how did u calculate from washer 5mm thicknes to be 5.5 L1? Thanks.