Admeasuring apparatus of tubular production’s wall thickness

1、Composition
Admeasuring apparatus of tubular production’s wall thickness is mainly constituted by the dial gauge, compression bar, zero bar,handle, etc. 
2、Operatiions
a) Zero set ,to ensure effective contact with the centre of dial gauge and zero bar(with proofreading pole ).
b) Grip handle, press down the compression bar with thumb thumb, expand the distance between the centre and zero bar, and take the object into the between of them,loose compression
bar slowly, to find the min point of the dial gauge,which is the wall thickness of tubular
production’s(Zero with proofreading pole,  min point of the dial gauge + the size of proofreading  pole =  wall thickness of tubular production’s).
3、Atteention
1）useing and transport gently，never to ram
2) Non-professional non-demolition