Product – High-quality, fast delivery, low-priced, Komatani Gauge Co., Ltd.

Snap gauges

Cylindrical plug gauges

Ring gauges

Parallel screw limit gauges

Taper gauges

Jig / Other

Snap gauge

If the object passes through the large hole and is stopped at the small, it is considered to be of acceptable size.

Single-plate snap gauge

(mm)

Nominal dimension D		B	L	T	b1	b2	a1	a2	c	r	e
3 or more	6 or less	30	50	4	10	22	11	3	3	3	–
More than 6	10 or less	36	60		11	23	12	5	3	3
More than 10	14 or less	50	60		12	28	18		4	4
More than 14	18 or less	60	70		13	32	25			4
More than 18	24 or less	65	70		14	34	28			5
More than 24	30 or less	75	80	5	15	36	34		5
More than 30	40 or less	90	90		17	40	22				24
More than 40	50 or less	110	100		19	43	28				30

C-shaped snap gauge

(mm)

Nominal dimension	D	B	L	T	I	R1	b1	b2	a	e
50 or more	65 or less	120	100	6	36	36	18	35	15	55
More than 65	80 or less	142	114		41	45	19	38	18	69
More than 80	100 or less	162	130		45	55	20	40	20	88
More than 100	120 or less	192	150	8	51	65	22	44	22	106
More than 120	140 or less	218	164		54	75	23	46	22	126
More than 140	160 or less	236	180		58	85	24	48	25	143
More than 160	180 or less	258	195		60	95	25	52		163
More than 180	200 or less	280	210		62	105	25	55		184
More than 200	225 or less	308	230		64	115	26	58		205
More than 225	250 or less	338	244		68	130	26	58	28	231
More than 250	280 or less	362	262		70	143	28	60		291
More than 280	315 or less	392	275		72	160	28	60		291

Details

Use	If the object passes through the large hole and is stopped at the small, it is considered to be of acceptable size.
Type	Single-plate snap gauge Under 50 with a single plate. Double-plate snap gauge Under 50 with double plates (For objects that can’t be measure with single-plate gauges) C-shaped snap gauge Size over 50 Groove diameter snap gauge For measurement in small spaces
Materials, surface processing	Partially-glazed finishing ….. SK5 Super sub-zero HRC58～63 Fully-glazed finishing ….. SKS3 Super sub-zero HRC58～63 *We also produce carbide finished versions.
Points of caution when ordering	• Please be sure to specify limit dimensions (maximum, minimum) (h7, ±0.2, etc.) • We can handle special orders as well. Please specify via a diagram, etc.

Cylindrical plug gauges

Evaluates the margin of error for a hole using the smallest and largest sizes

Cylindrical plug gauges

(mm)

Nominal dimensionD		Pass side		Stop side		m	L
Nominal dimensionD		K1	L1	K2	L2	m	L
1or more	3or less	7	25	3.5	25	4	58.5
More than 3	6or less	10	32	5	32	6	77
More than 6	10or less	12	37	7	37		101
More than 10	14or less	13	37	7	37		107
More than 14	18or less	17	42	10	42		119
More than 18	24or less	17	42	10	42		119
More than 24	30or less	22	52	13	52	8	141
More than 30	40or less	25	60		60	9.5	157
More than 40	50or less	25	60		60	9.5	157

Details

Use	Evaluates the margin of error for a hole using the smallest and largest sizes.
Type	A limit plug gauge is that which smoothly passes through the entrance and is stopped at the end. Master plug gauges are used as examples for the proper width. Limit plug gauge This will allow the smallest diameter of the hole to pass, while stopping the largest. We have both single and double-plane versions. Master plug gauge Acts to set the standard of hole size.
Materials, surface	SKS3　Super sub-zero　HRC58～63 *We also produce carbide finished versions.
Points of caution when ordering	For limit plug gauges, please be sure to include the tolerance, such as H7, +0.2/0, etc. of the item to be measured. For non-standard single-plated plug gauges, please specify the necessary length (length of work). We can handle special orders for items other than the standard ones shown above. Please provide your specifications using a diagram, etc.

Ring gauges

To match the standards (0 set) of cylinder gauges and 3 piece micrometers

Ring gauges

(mm)

Nominal dimensionＤ		External diameter	Thickness	Display of stopping side
More than	or less	D1	K	a	b
1or more	2.5	22	4	0.6	0.6
2.5	5	22	5	0.6	0.6
5	10	32	8	1	0.8
10	15	38	10	2	1
15	20	45	12
20	25	53	14
25	32	63	16
32	40	71	18	3	1.5
40	50	85	20
50	60	100	24
60	70	112
70	80	125
80	90	140
90	100	160

Tolerance of master ring creation

Size	Common difference	Size	Common difference
～32	±0.0015	～200	±0.004
～50	±0.002	～250	±0.006
～100	±0.0025	～300	±0.007
～150	±0.003

Details

Use	To match the standards (0 set) of cylinder gauges and 3 piece micrometers
Type	Master ring For limit ring gauges
Materials, surface	SKS3　Super sub-zero　HRC58～63 *We also produce carbide finished versions.
Points of caution when ordering	For limit ring gauges, please be sure to include the tolerance, such as H7, +0.2/0, etc. of the item to be measured. The master rings are generally mde to tolerances in the chart, but can be made more stringent on request. We will also produce unique products on request. Please specify your request using diagrams, etc.

Parallel screw limit gauges

To manage the limits (maximum/minimum size) of product screws by stoppong or allowing them to pass

Details

Use	To manage the limits (maximum/minimum size) of product screws by stopping or allowing them to pass.
Type	Thread plug gauge Used to evaluate tap holes, etc. Thread ring gauge To evaluate male threads. Standard thread gauge The thread plug gauge and thread ring gauge match up to become a set, made to the specifications of the standard diameter of the thread. However, it cannot be used to determine the matching up of two elements.
System	ISO Grading System…No differentiation between work and measurement. Evaluation is determined by whether or not the thread can be turned more than twice at the stopping side. JIS 1,2,3 Grading System…Evaluation is determined by whether or not the thread can be turned more than twice at the stopping side.
Materials, surface	SKS3　Super sub-zero　HRC58～63
Points of caution when ordering	As there are many types of thread gauge, please specify the thread format, such as S, UNF, UNC, SM, etc. We will also produce unique products on request. Please specify your request using diagrams, etc.

Taper gauges

Morse taper, National taper, Jacobs taper, etc

National taper gauge

(mm)

	Dimensions of taper part					A	taper
	D	d	L	a	C	A	α/2
NT10	15.875	9.525	21.770	1.6	23.370	36	8°17′49.7″
NT20	22.225	12.700	32.657		34.257	50
NT25	25.400	13.818	39.711		41.311	55
NT30	31.750	17.467	48.971		50.571	55
NT35	38.100	21.431	57.150		58.750	65
Nt40	44.450	25.400	65.316		66.916	72
NT45	57.150	32.610	84.138		85.738	90
NT50	69.850	39.676	103.454	3.2	106.654	105
NT55	88.900	50.469	131.763		134.963	130
NT60	107.950	60.722	161.925		165.125	160

Morse taper gauge

(mm)

	Dimensions of taper part					taper
	D	d	L	a	C	α/2
NK-MYN00	9.045	6.401	55	3.2	50.8	1°29.4472′
NK-MYN01	12.065	9.371	58.5	3.5	54	1°25.7231′
NK-MYN02	17.78	14.533	70	4	65	1°25.8416′
NK-MYN03	23.825	19.759	86.6	4.5	81	1°26.2624′
NK-MYN04	31.267	25.907	109.8	5.3	103.2	1°29.2548′
NK-MYN05	44.399	37.468	139.4	6.3	131.7	1°30.4366′
NK-MYN06	63.348	53.749	193.5	7.9	184.1	1°29.5984′
NK-MYN07	83.058	69.85	265.1	9.5	254	1°29.3442′

Details

Type	Morse taper, National taper, Jacobs taper etc.
Points of caution when ordering	Plese specify /N taper gauges with ΦD or C(L), and full size (half size) taper gauges with ΦD, α(α/2), C(L). It is not possible to produce only a taper gauge. We can only produce them as a set with a plug gauge. It is also possible to produce them if you have an example to follow. We can also handle special tapers. Please provide your specifications using a diagram, etc.

Jigs / Other

introduction of other products

If we can receive specification diagrams, we are able to produce various jigs and other special gauges. Also if you have requests such as wanting to measure something for which you have no diagram, or wanting a gauge that is easier to use than your current one, we are capable of designing and producing new ones, so please confer with us.