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VALVE SEAT CONTACT GAGE..

Sphere Contact Rate Gage..

Chamfer Testing GAGE..

Centricity Gage..

Screw Centricity Gage..

Cylinder Contact Gage..

Meter Thread Gage

ISO Grade

1.2.3 Grade

(1) Outline
　

		Limit Gage for Screw is set as the same grade as standards of screws
		and tested by 2 limit methods as passing side and stop side.
		The screw is passed if pass side gage passes
		through without difficulty and stop side gage stops within 2 turns.
		Manages by checking passing or stopping limit of screw.
		Meter Screw Gage is broadly divided into
		ISO Grade Gage and 1.2.3 Grade Gage.

(2) Differences between ISO Grade and 1.2.3 Grade
　

	ISO Grade	1.2.3 Grade
Process Part on Stop side	No distinction between testing, processing on stop side	Distinguished between testing, processing
Stop length on Stop side	Does not fit more than 2 turns	Does not fit more than 2 turns
Fit Testing Gage	Setting testing gage passes through	Use by sensing since Fit testing gage is 1 unit
Wear Testing Gage	Wear testing plug gage is present on pass, stop side gage	On wear testing plug is present for pass side ring gage

(3) Comparison between ISO Grade and 1.2.3 Grade
　

	Grades	Precision Grade	Normal Grade	Rough Grade	Remarks
Male	ISO Grade	4h	6g(6h)	8g	Grade applied up to M1.4 name within ( )
Male	1.2.3 Grade	1 Grade	2 Grade	3 Grade
Female	ISO Grade	5h	6h(5h)	7h
Female	1.2.3 Grade	1 Grade	2 Grade	3 Grade

		Names applied on normal screw, male screw 8g Grade and 3-Grade are M5 ~ M68
		Names applied on thin screw, male screw 8g Grade and 3-Grade are M8X1.0 ~ M150
		Name applied on normal screw, male screw 7H Grade and 3-Grade are M3 ~ M68
		Name applied on thin screw, male screw 7H Grade and 3-Grade are M4X0.5 ~ M150X2

(4) Expression Method
　

▣ 1, 2, 3 Grade Grading Method
    Product: M10P1.5-II Gage M10P1.5
          - GPⅡ, IPⅡ
          - GPⅡ, WPⅡ

Trapezoid Screw Thread Gage..

Parallel Pipe Thread gage..

Taper Pipe Thread Gage..

American Standard Taper Pipe Thread Gage..

Unified Screw Thread..

Meter Thread Gage..

Adjustable thread ring gage..

      Master Gage is a gage used for setting
   standard \measurement such as setting measurements of
   comparison measuring instruments.

Name(mm) Nominal size D		tolerance(㎛)	Circularity,cylindricity(㎛)
above	include	tolerance(㎛)	Circularity,cylindricity(㎛)
above1	3	±1.0	0.6
3	6	±1.2	0.8
6	10	±1.2	0.8
10	18	±1.5	1.0
18	30	±2.0	1.2
30	50	±2.0	1.2
50	80	±2.5	1.5
80	120	±3.0	2.0
120	180	±4.0	2.5
180	250	±5.0	3.5
250	315	±6.0	4.0
315	400	±9.0	6.5

- Please inform the followings when making orders on Master Gage.

   1. Types of Gage (Master Ring, Master Plug)
   2. Naming (Ø30 etc)
   3. Special Dimensions (Shape, display, gage tolerance)
　