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cast iron box, used for inspection ,layout tooling and machine set-ups.Also used as parallels ,right angles or spuare - details see: https://www.machineto.com/cast-iron-box-10165030

cast iron box details introduce

Square block (as per GB7-62) is an important auxiliary tool in the plate measurement .It is used for inspecting and measuring the tridimensional lineation by fitters, the parallelism and verticality of machining parts , as well as various location differences.

cast iron box specification:

Type(mm)	Parallelism of working surface		Flatness of working surface		Perpendicularity of working surface
	Precision grade(μ,)
	1	2	1	2	1	2
100*100*100	2	4	2	4	2	4
150*150*150	3	6	3	6	3	6
200*200*200	4	8	2.5	4	4	8
300*300*300	6	12	2.5	4	6	12
400*400*400	8	16	4	8	8	16
500*500*500	20	40	5	12	20	40