Cast iron ruler - Cast iron square ruler

NegotiableUpdate on 12/11

Model

Nature of the Manufacturer: Producers

Product Category

Place of Origin

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Overview

The cast iron ruler is manufactured according to JB/T974-99 standard, with material HT200-250. The working surface of the cast iron ruler adopts scraping or precision grinding technology, which is used to measure the straightness and flatness of the workpiece and equipment installation. The operating temperature of the cast iron ruler is 20 ± 5 ℃.

Product Details

The cast iron ruler is manufactured according to JB/T974-99 standard, with material HT200-250. The working surface adopts scraping or precision grinding technology, and is used to measure the straightness and flatness of the workpiece and equipment installation. The operating temperature is 20 ± 5 ℃.

Specification mm	Straightness or flatness of the working surface			Parallelism between working faces			Verticality of the side to the working surface
	Accuracy level um
	0	1	2	0	1	2	0	1	2
500×35	3	6	12	4.5	9	18	15	30	60
750×40	4	8	15	6	12	25	20	40	80
1000×50	5	10	20	7.5	15	30	25	50	100
1250×50	6	12	24	9	18	36	30	60	120
1600×70	7.4	15	30	10	20	40	37	75	150
2000×80	9	18	36	13.5	27	54	45	90	180
2500×80	11	22	44	16	32	65	55	110	220
3000×100	13	26	52	19.5	39	78	65	130	260
3500×100	15	30	60	22	45	90	75	150	300
4000×100	17	34	68	25	50	100	85	170	340
5000×110	21	42	84	30	60	120	105	210	420
6000×120	26	52	105	35	78	158	130	260	525
8000×120	33	66	132	49	98	196	165	330	660