Bridge deformation test
ISO 12870 8.4



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Manuel version

Test Equipment Prüfsysteme Toothbrush dental Material Prüfmittel Mundpflege Zahnbürste Zahnpasta interdentale Bürsten Zahnseide Dentalwerkstoff Elastomere Amalgam Prothesen Spectacle Glasses  ISO 12780 Joachim Wilhelm Engineering


The ISO 12870 describes a test of the bridge deformation under load and check the fit of the lens in the eyeglass frame.
The left lens is mounted between two annular clamping jaws. Then the right lens is moved  with a rod  up to 8 mm up to a force of 5 N. After 5 s the glasses is relieved and
the deformation is measured after 20 s. The permanent deformation shall not exceed 2% and the spectacle frame may occured no cracks or breaks.


Dimension(B,T,H)   ca. 200, 200, 300 mm
Weight   10 kg

Scope of Delivery

1 Test Device
1 Operating Instruction


Bridge Deformation Test manuel   620-010   3.880,- €

Conditions of Delivery

Delivery: DAP
Shipping time: by arrangement

Technical changes reserved.

The illustrations may differ from the actual equipment.

All data without obligation and not-binding.

The prices quoted are net prices.