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Feature:

1.Manudacturing according to Standard JB/T7974-99

2.Material:HT200-250

3.Working surface made by scraping or grinding.

4.Used for testing the workpiece straightness and flatness,and equipment installation. 

5.Working environment temperature is (20 ± 5) °C

Usage:

a.It is used to test the straightness and flatness of workpiece and equipment installing.

b.straight edges are also used for blue matching during hand scrapping operations&have wide and parallel working surface for application of spirit level. 

Specification:Specification: 200mm-8000mm.  

special specifications can be made as your requirement.

Made according to standard   JB/T7974-99 , 

material HT250, 

working surface made by skiving or precise rubbing. 

Working environment temperature is (20 ± 5) °C.