PLAIN GAUGES-光面螺纹规-东莞市必途仪器有限公司

光面螺纹规

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Plain Gauges - Plugs, Rings, Pin Sets, Calipers, Barrel Spherical

PLAIN GAUGES, LIMITS AND FITS

Plain gauges generally fall into two types:– plugs for internal holes, and rings or gaps, sometimes referred to as ‘snap’ or caliper gauges for shafts.

The tolerance and position of a hole or shaft is described by a letter and a number. A capital letter denotes a hole and a small letter a shaft. The letter describes the position of the component tolerance relative to the nominal size, and the number denotes the magnitude of the tolerance. Thus H8 for a hole or h8 for a shaft.
The letters range from A or a to Z or z and are divided into three main classes:– clearance; transition and interference. A fit between hole and shaft is described as e.g. H8–f8. The numbers range from 1 to 16.

It is possible to combine any shaft with any hole but it is recommended that the ‘unilateral hole system’ be adopted with ‘H’ being the standard hole. Conversely a ‘unilateral shaft system’ with ‘h’ as the standard shaft may also be used.

The magnitude of the tolerance remains the same regardless of position, e.g. the hole of say K8 has the same tolerance as an H8. Only the position is changed relative to the basic size.

A more detailed explanation of the system is given in
BS 4500:Section 1.1: 1990 and BS 4500: Section 1.2:1990 for metric limits and fits and BS 1916 Parts 1, 2 & 3 for inch sizes. Plain limit gauges are manufactured to BS 969:1982, which specifies tolerancing of the gauges themselves.

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相关附件

Plain Plug Gauges - Steel (reversible design steel)
Size		Double Ended	Single Ended	Member only
mm	inch	Double Ended	Single Ended	Member only
0.25-0.40	0.010-0.015	HO31	HO31S	HO31M
0.40-0.75	0.015-0.030	HO32	HO32S	HO32M
0.75-6.00	0.030-0.250	HO33	HO33S	HO33M
6.00-11.00	0.250-0.4375	HO34	HO34S	HO34M
11.00-12.50	0.4375-0.500	HO35	HO35S	HO35M
12.50-16.00	0.500-0.625	HO36	HO36S	HO36M
16.00-19.00	0.625-0.750	HO37	HO37S	HO37M

Plain Plug Gauges - Steel (Taper lock design - steel)
Size		Double Ended	Single Ended	Member only
mm	inch	Double Ended	Single Ended	Member only
3.00-9.50	0.125-0.375	HO11	HO11S	HO11M
9.50-12.50	0.375-0.500	HO12	HO12S	HO12M
12.50-17.50	0.500-0.687	HO13	HO13S	HO13M
17.50-22.00	0.687-0.875	HO14	HO14S	HO14M
22.00-25.50	0.875-1.000	HO15	HO15S	HO15M
25.50-28.50	1.000-1.125	HO16	HO16S	HO16M
28.50-32.00	1.125-1.250	HO17	HO17S	HO17M
32.00-38.00	1.250-1.500	HO18	HO18S	HO18M
38.00-44.50	1.500-1.750	HO19	HO19S	HO19M
44.50-51.00	1.750-2.000	HO110	HO110S	HO110M
51.00-57.00	2.000-2.250	HO111	HO111S	HO111M
57.00-65.00	2.250-2.500	HO112	HO112S	HO112M

Plain Plug Gauges - Steel (TRI lock Design - steel)
Size		Double Ended	Single Ended go	Member End n/go
mm	inch	Double Ended	Single Ended go	Member End n/go
19.00-25.00	0.750-1.000	HO21	HO21G	HO21N
25.00-32.00	1.000-1.250	HO22	HO22G	HO22N
32.00-38.00	1.250-1.500	HO23	HO23G	HO23N
38.00-50.00	1.500-2.000	HO24	HO24G	HO24N
50.00-63.00	2.000-2.500	HO25	HO25G	HO25N
63.00-75.00	2.500-3.000	HO26	HO26G	HO26N
75.00-90.00	3.000-3.500	HO27	HO27G	HO27N
90.00-100.00	3.500-4.000	HO28	HO28G	HO28N
100.00-115.00	4.000-4.500	HO29	HO29G	HO29N
115.00-125.00	4.500-5.000	HO210	HO210G	HO210N
125.00-140.00	5.000-5.500	HO211	HO211G	HO211N
140.00-150.00	5.500-6.000	HO212	HO212G	HO212N
150.00-180.00	6.000-7.000	-	HO213G	HO213N
180.00-200.00	7.000-8.000	-	HO214G	HO214N
200.00-230.00	8.000-9.000	-	HO215G	HO215N
230.00-250.00	9.000-10.000	-	HO216G	HO216N