Purposes: of cast iron feet of vertical parallel box combination, applies not perpendicular to the inspection between the high-precision machinery and equipment, inspection and machine is an important tool used to check the verticality between the various machine internal. 
 Feet of cast iron: GB6092-85 standard manufacturing materials HT200-250, for perpendicularity, parallelism detection, can be measured as a 90 ° benchmark. 

 Specifications mm relative measurement of the surface parallel to the degree of adjacent sides of the vertical measurement surface straightness 
 Accuracy rating um 


 012,012,012 
 200 × 200 × 30 4 8 16 1.5 3 6 4 8 16 
 250 × 250 × 30 4.5 9 18 2 8 8 4.5 9