High precision aperture on universal tool microscope

The instruments used to detect the aperture of a high-precision smooth ring gauge in practical work can be divided into two categories: one is a dedicated high-precision aperture measuring instrument; the other is a general-purpose measuring instrument. They have their own advantages and each has its own limitations. Common special aperture measuring instruments include: image point meter, small aperture measuring instrument, Abbey hole length meter, etc. These instruments are not conducive to widespread application in production due to high price and harsh conditions.
Steel Grating

For products reference

No. Item Description

1 Bearing Bar Size 25x3, 25x4, 25x4.5, 25x5, 30x3, 30x4, 30x4.5, 30x5, 32x5, 40x5, 50x5, 65x5, 75x6, 75x10---100x10mm etc.

I bar: 25x5x3, 30x5x3, 32x5x3, 40x5x3 etcUS standard: 1''x3/16'', 1 1/4''x3/16'', 1 1/2''x3/16'', 1''x1/4'', 1 1/4''x1/4'', 1 1/2''x1/4'', 1''x1/8'', 1 1/4''x1/8'', 1 1/2''x1/8'' etc.

2 Bearing Bar Pitch 12.5, 15, 20, 23.85, 25, 30, 30.16, 31, 32.5, 34.3, 35, 38.1, 40, 41.25, 60, 80mm etc.

US standard: 19-w-4, 15-w-4, 11-w-4, 19-w-2, 15-w-2 etc.

3 Cross Bar Size and Pitch Twisted bars 5x5, 6x6, 8x8mm; Round bars Dia.6, 7, 8, 9, 10, 12mm and so on.

38.1, 40, 50, 60, 76, 80, 100, 101.6, 120, 135mm, 2'' & 4'' etc.

4 Material Grade ASTM A36, A1011, A569, Q235, S275JR, SS400, Mild steel & Low carbon steel, etc.

Stainless steel SS304, SS316.s335jr

5 Surface Treatment Black, self colour, hot dip galvanized, painted, powder coating, electrolytic polishing.

6 Grating Style Plain / Smooth, Serrated /teeth, I bar, serrated I bar.

7 Standard China: YB/T 4001.1-2007, USA: ANSI/NAAMM(MBG531-88),UK: BS4592-1987, Australia: AS1657-1985,Germany: DIN24537-1-2006, Japan: JIS.

8 Panel Size: 3x20ft,3x24ft,3x30ft,5800x1000, 6000x1000, 6096x1000,6400x1000, as request

9 Application: oil refinery,petroleum and chemical Industry, Seaport and airport, power plant, transportation, papermaking, medicine, steel and iron, food, municipality, real estate, manufacturing,metallurgy,railway,boiler,etc

Steel Grating,Steel Bar Grating,Galvanized Steel Bar Grating,Steel Bar Grating For Bridge
HEBEI KAYI BUILDING MATERIAL TECHNOLOGY CO.,LTD , http://www.kayigrating.com

For products reference
No.	Item	Description
1	Bearing Bar Size	25x3, 25x4, 25x4.5, 25x5, 30x3, 30x4, 30x4.5, 30x5, 32x5, 40x5, 50x5, 65x5, 75x6, 75x10---100x10mm etc.
1	Bearing Bar Size	I bar: 25x5x3, 30x5x3, 32x5x3, 40x5x3 etcUS standard: 1''x3/16'', 1 1/4''x3/16'', 1 1/2''x3/16'', 1''x1/4'', 1 1/4''x1/4'', 1 1/2''x1/4'', 1''x1/8'', 1 1/4''x1/8'', 1 1/2''x1/8'' etc.
2	Bearing Bar Pitch	12.5, 15, 20, 23.85, 25, 30, 30.16, 31, 32.5, 34.3, 35, 38.1, 40, 41.25, 60, 80mm etc.
2	Bearing Bar Pitch	US standard: 19-w-4, 15-w-4, 11-w-4, 19-w-2, 15-w-2 etc.
3	Cross Bar Size and Pitch	Twisted bars 5x5, 6x6, 8x8mm; Round bars Dia.6, 7, 8, 9, 10, 12mm and so on.
3	Cross Bar Size and Pitch	38.1, 40, 50, 60, 76, 80, 100, 101.6, 120, 135mm, 2'' & 4'' etc.
4	Material Grade	ASTM A36, A1011, A569, Q235, S275JR, SS400, Mild steel & Low carbon steel, etc.
4	Material Grade	Stainless steel SS304, SS316.s335jr
5	Surface Treatment	Black, self colour, hot dip galvanized, painted, powder coating, electrolytic polishing.
6	Grating Style	Plain / Smooth, Serrated /teeth, I bar, serrated I bar.
7	Standard	China: YB/T 4001.1-2007, USA: ANSI/NAAMM(MBG531-88),UK: BS4592-1987, Australia: AS1657-1985,Germany: DIN24537-1-2006, Japan: JIS.
8	Panel Size:	3x20ft,3x24ft,3x30ft,5800x1000, 6000x1000, 6096x1000,6400x1000, as request
9	Application:	oil refinery,petroleum and chemical Industry, Seaport and airport, power plant, transportation, papermaking, medicine, steel and iron, food, municipality, real estate, manufacturing,metallurgy,railway,boiler,etc