rotation symmetric roller
- Length 1000 mm
- Length of the medium section 400 mm, 300 mm
- Spherical ends reduced to 250 mm
- Outer edges with radius : 20 mm
- Roller load 1400 N
Test parameters
length of stroke : 500 mm
cycle : 1 cycle consists of one forword and one backward stroke in sinusoidal motion
Rolling strain : symmetric over the width of the pocket spring unit
stage 1 for 30000 strokes = 15000 cycles
stage 2 for 30000 strokes = 15000 cycles
total test for 60000 strokes = 30000 cycles
Roller drive : horizontal directed force
test rate : 16 +- 2 cycles per minute
Condition in the test bay : Standard climate, 23/50-2, DIN 50 014
Visual examination
the latex core has been cheacked before, during and after the durability tset.