Description:

Made according to standard JB/T7977-99, material HT250, working surface made by skiving or precise rubbing. Used to test the straightness and flatness of workpiece and equipment installing. Working environment temperature (20 ± 5) ℃.

Type (mm) Straightness and flatness

of working surface Parallelism between working surfaces

Precision grade ( μm)

0 1 2 0 1 2

500 × 35 3 6 12 4.5 9 18

750 × 40 4 8 15 6 12 25

1000 × 50 5 10 20 7.5 15 30

1250 × 50 12 24 18 36

1600 × 70 15 30 20 40

2000 × 80 18 36 27 54

2500 × 80 44 65

3000 × 100 52 78

3500 × 100 60 90

4000 × 100 68 100 

 

 Wooden Box (Also as customer's demand)

 

About us:

 

ZHGONGBO HEAVY INDUSTRY is a professionally managed company engaged in manufacturing granite inspection equipment, cast iron surface plate, cast iron bed plate, cast iron angle plate, cast iron box angle plate & cast iron test beds along with 3D measuring & layout machines in Hebei Province ,CHINA. With a vast customer base, the company has been always been in the pursuit of excellence in its products. A customer who is once a customer of ZHONGBO is always a customer.