Digital Internal Micrometer

The three-point internal micrometer has an automatic centering function and can measure hole diameters with high precision, achieving micrometer-level accuracy.

The internal micrometers with 3 contactors is suitable for precision manufacturing and quality inspection fields.

The wide range internal micrometers feature a unique design, allowing for a very large measurement range.

Large Digital internal micrometer Type-A

Range : 50-300mm / 2-12"

Large measuring range due to the patent structure.
Precision measurement for blind holes and through holes.
Carbide-tipped contact points.
Retchet stop.
Supplied with setting rings.(It is optional over 150mm)
Protection level IP54.
Data cables are optional to connect a computer for data processing.

Large digital internal micrometer Type-A

Range	Accuracy	Setting rings
50-70mm	0.004mm	φ50mm
70-100mm	0.004mm	φ70mm
100-150mm	0.005mm	φ100mm
150-250mm	0.007mm	φ150mm
200-300mm	0.007mm	φ200mm Optional
2-2.8"	0.00016"	2"
2.8-4"	0.00016"	2.8"
4-6"	0.00020"	4"
6-10"	0.00028"	6"
8-12"	0.00028"	8" Optional

Large Digital internal micrometer Type-B

Range : 200-1000mm / 8-40"

The measurement range is large due to the patented structure.
High-precision interchangeable probe, no need to reset after replacement.
Precision measurement for blind holes and through holes.
Carbide-tipped contact points.
Retchet stop.
Setting rings are optional.
Protection level IP54.
Data cables are optional to connect a computer for data processing.

Large digital internal micrometer Type-B

Range	Accuracy	Setting rings	Interchangeable probe (L)	Extension rods
200-500mm	(1+L/50) μm	200mm	3x50mm	150mm
			3x100mm	500mm
200-1000mm	(1+L/50) μm	200mm	3x50mm	150mm
			3x100mm	500mm
			3x150mm	1000mm
			3x200mm	-
			3x250mm	-
			3x300mm	-
			3x350mm	-
8-20"	0.00004"	8"	3x2"	6"
	"(1+L/2)"		3x4"	20"
8-40"	0.00004"	8"	3x2"	6"
	"(1+L/2)"		3x4"	20"
			3x6"	40"
			3x8"	-
			3x10"	-
			3x12"	-
			3x14"	-

Digital Internal Micrometer Type-C

Range: 2-6mm / 0.08-0.28"

Precision measurement for blind holes and through holes.
Retchet stop.
Supplied with setting rings.
Range 2-6mm / 0.08 – 0.28” is two-point model used for small holes.
Protection level IP54.
Data cables are optional to connect a computer for data processing.

Digital internal micrometer Type-C

Range	Accuracy	Setting Rings	L
0.24-0.28"	0.00016"	φ 0.24”	22.5mm / 0.9”
2-2.5mm / 0.08-0.1"	0.004mm/0.00016"	φ2.5mm / 0.1”	12.5mm / 0.5”
2.5-3mm / 0.1-0.12"	0.004mm/0.00016"	φ2.5mm / 0.1”	12.5mm / 0.5”
3-4mm / 0.12-0.16"	0.004mm/0.00016"	φ4mm / 0.16”	22.5mm / 0.9”
4-5mm / 0.16-0.2"	0.004mm/0.00016"	φ5mm / 0.16”	22.5mm / 0.9”
5-6mm / 0.2-0.24"	0.004mm/0.00016"	φ6mm / 0.24”	22.5mm / 0.9”

Digital Internal Micrometer Type-D

Range: 6-12mm / 0.275-0.5"

Precision measurement for blind holes and through holes.
Retchet stop.
Supplied with setting rings.
Protection level IP54.
Data cables are optional to connect a computer for data processing.

Digital internal micrometer Type-D

Range	Accuracy	Setting Rings	L 1	A	Extension Rod
0.275-0.35"	0.00016"	0.275"	2.14"	0.02"	4"
0.35-0.425"	0.00016"	0.35"	2.14"	0.02"	4"
0.425-0.5"	0.00016"	0.5"	2.14"	0.02"	4"
6-8mm	0.004mm	φ6mm	53.5mm	0.5mm	100mm
8-10mm	0.004mm	φ8mm	53.5mm	0.5mm	100mm
10-12mm	0.004mm	φ10mm	53.5mm	0.5mm	100mm

Digital Internal Micrometer Type-E

Range: 6-50mm / 0.275 - 2"

Precision measurement for blind holes and through holes.
Carbide-tipped contact points （except 6-12mm）
Retchet stop.
Supplied with setting rings.
Protection level IP54.
Data cables are optional to connect a computer for data processing.

Digital internal micrometer Type-E

Range	Accuracy	Setting Rings	L1	A	Extension rods
6-8mm	0.004mm	φ6mm	54.5mm	1.5mm	100mm
8-10mm	0.004mm	φ8mm	54.5mm	1.5mm	100mm
10-12mm	0.004mm	φ10mm	54.5mm	1.5mm	100mm
12-16mm	0.004mm	φ16mm	80mm	0.5mm	150mm
16-20mm	0.004mm	φ16mm	80mm	0.5mm	150mm
20-25mm	0.004mm	φ25mm	90mm	0.5mm	150mm
25-30mm	0.004mm	φ25mm	90mm	0.5mm	150mm
30-40mm	0.004mm	φ40mm	97mm	0.5mm	150mm
40-50mm	0.005mm	φ40mm	97mm	0.5mm	150mm
0.275-0.35"	0.00016"	0.275"	2.18"	0.06"	4"
0.35-0.425"	0.00016"	0.35"	2.18"	0.06"	4"
0.425-0.5"	0.00016"	0.5"	2.18"	0.06"	4"
0.5-0.65"	0.00016"	0.65"	3.2"	0.02"	6"
0.65-0.8"	0.00016"	0.65"	3.2"	0.02"	6"
0.8-1"	0.00016"	1"	3.6"	0.02"	6"
1-1.2"	0.00016"	1"	3.6"	0.02"	6"
1.2-1.6"	0.00016"	1.6"	3.88"	0.02"	6"
1.6-2"	0.0002"	1.6"	3.88"	0.02"	6"

Large Digital Internal Micrometer Type-F

Range: 50-300mm / 2 -12"

Precision measurement for blind holes and through holes.
Supplied with setting rings. (It is optional over φ100mm.)
Carbide-tipped contact points.
Retchet stop.
Aluminum body.
Protection level IP54.
Data cables are optional to connect a computer for data processing.

Large digital internal micrometer Type-F

Range	Accuracy	Setting Rings	L1	Extension rods
50-63mm	0.005mm	φ62mm	114mm	150mm
62-72mm	0.005mm	φ62mm	114mm	150mm
75-88mm	0.005mm	φ87mm	114mm	150mm
87-100mm	0.005mm	φ87mm	114mm	150mm
100-125mm	0.005mm	φ100mm	150mm	150mm
125-150mm	0.005mm	φ150mm	150mm	150mm
150-175mm	0.005mm	φ150mm	150mm	150mm
175-200mm	0.005mm	φ200mm	150mm	150mm
200-225mm	0.007mm	φ200mm	150mm	150mm
225-250mm	0.007mm	φ250mm	150mm	150mm
250-275mm	0.007mm	φ250mm	150mm	150mm
275-300mm	0.007mm	φ275mm	150mm	150mm
2-2.5"	0.0002"	2.5"	4.56"	6"
2.5-3"	0.0002"	2.5"	4.56"	6"
3-3.5"	0.0002"	3.5"	4.56"	6"
3.5-4"	0.0002"	3.5"	4.56"	6"
4-5"	0.0002"	4"	6"	6"
5-6"	0.0002"	6"	6"	6"
6-7"	0.0002"	6"	6"	6"
7-8"	0.0002"	8"	6"	6"
8-9"	0.00028"	10"	6"	6"
9-10"	0.00028"	10"	6"	6"
10-11"	0.00028"	10"	6"	6"
11-12"	0.00028"	11"	6"	6"

Large Digital Internal Micrometer Type-G Pistol-shaped snap internal micrometer

Range: 6-300mm / 0.275 -12"

Can be operated with one hand, and both left and right hands can be used easily.
Self-centering 3-point, suitable for precise measurement of blind holes or through holes.
Carbide-tipped contact points(except 6-12mm).
Supplied with setting rings, it is optional over 100mm.
Dial indicator is optional, with installation dimensions of φ8mm or 3/8” (φ9.525mm)

Large digital internal micrometer Type-G

Range	Accuracy	Setting Rings	L	A	Extension rods
6-8mm	0.004mm	φ6mm	50mm	1.5mm	100mm
8-10mm	0.004mm	φ8mm	50mm	1.5mm	100mm
10-12mm	0.004mm	φ10mm	50mm	1.5mm	100mm
12-16mm	0.004mm	φ16mm	65mm	0.5mm	150mm
16-20mm	0.004mm	φ16mm	65mm	0.5mm	150mm
20-25mm	0.004mm	φ25mm	91mm	0.5mm	150mm
25-30mm	0.004mm	φ25mm	91mm	0.5mm	150mm
30-40mm	0.004mm	φ40mm	97mm	0.5mm	150mm
40-50mm	0.005mm	φ40mm	97mm	0.5mm	150mm
50-63mm	0.005mm	φ62mm	112mm	0.5mm	150mm
62-72mm	0.005mm	φ62mm	112mm	0.5mm	150mm
75-88mm	0.005mm	φ87mm	112mm	0.5mm	150mm
87-100mm	0.005mm	φ87mm	112mm	0.5mm	150mm
100-125mm	0.005mm	φ112.5mm	130mm	0.5mm	150mm
125-150mm	0.005mm	φ137.5mm	130mm	0.5mm	150mm
150-175mm	0.005mm	φ162.5mm	130mm	0.5mm	150mm
175-200mm	0.005mm	φ187.5mm	130mm	0.5mm	150mm
200-225mm	0.007mm	φ212.5mm	130mm	0.5mm	150mm
225-250mm	0.007mm	φ237.5mm	130mm	0.5mm	150mm
250-275mm	0.007mm	φ262.5mm	130mm	0.5mm	150mm
275-300mm	0.007mm	φ287.5mm	130mm	0.5mm	150mm
0.275-0.35"	0.00016"	0.275"	2"	0.06"	4"
0.35-0.425"	0.00016"	0.35"	2"	0.06"	4"
0.425-0.5"	0.00016"	0.5"	2"	0.06"	4"
0.5-0.65"	0.00016"	0.65"	2.6"	0.02"	6"
0.65-0.8"	0.00016"	0.65"	2.6"	0.02"	6"
0.8-1"	0.00016"	1"	3.64"	0.02"	6"
1-1.2"	0.00016"	1"	3.64"	0.02"	6"
1.2-1.6"	0.00016"	1.6"	3.88"	0.02"	6"
1.6-2"	0.0002"	1.6"	3.88"	0.02"	6"
2-2.5"	0.0002"	2.5"	4.48"	0.02"	6"
2.5-3"	0.0002"	2.5"	4.48"	0.02"	6"
3-3.5"	0.0002"	3.5"	4.48"	0.02"	6"
3.5-4"	0.0002"	3.5"	4.48"	0.02"	6"
4-5"	0.0002"	4.5"	5.2"	0.02"	6"
5-6"	0.0002"	5.5"	5.2"	0.02"	6"
6-7"	0.0002"	6.5"	5.2"	0.02"	6"
7-8"	0.0002"	7.5"	5.2"	0.02"	6"
8-9"	0.00028"	8.5"	5.2"	0.02"	6"
9-10"	0.00028"	9.5"	5.2"	0.02"	6"
10-11"	0.00028"	10.5"	5.2"	0.02"	6"
11-12"	0.00028"	11.5"	5.2"	0.02"	6"

Digital Internal Micrometer Set

Digital internal micrometer set Type-A

Range	Individual range	Setting rings	Extension rods
50-100mm	50-70 / 70-100mm	Ø70mm	150mm
100-250mm	100-150 / 150-250mm	Ø150mm	150mm
2-4"	2-2.8" / 2.8-4"	2.8"	6"
4-10"	4-6" / 6-10"	6"	6"

Digital internal micrometer set Type-C

Range	Individual range	Setting rings	Extension rods
2-3mm	2-2.5 / 2.5-3mm	Ø2.5mm	-
3-6mm	3-4 / 4-5 / 5-6mm	Ø4 / 5 / 6mm	-
0.08-0.12"	0.08-0.1" / 0.1-0.12"	0.1"	-
0.12-0.28"	0.12-0.16" / 0.16-0.2" / 0.2-0.24" / 0.24-0.28”	0.16" / 0.24"	-

Digital internal micrometer set Type-D

Range	Individual range	Setting rings	A	Extension rods
6-12mm	6-8 / 8-10 / 10-12mm	Ø6 / 8 / 10mm	0.5mm	100mm
0.275-0.5"	0.275-0.35" / 0.35-0.425" / 0.425-0.5"	0.275" / 0.35" / 0.5"	0.02"	4"

Digital internal micrometer set Type-E

Range	Individual range	Setting rings	A	Extension rods
6-12mm	6-8 / 8-10 / 10-12mm	Ø6 / 8 / 10mm	1.5mm	100mm
12-20mm	12-16 / 16-20mm	Ø16mm	0.5mm	150mm
20-40mm	20-25 / 25-30 / 30-40mm	Ø25 / 40mm	0.5mm	150mm
20-50mm	20-25 / 25-30 / 30-40 / 40-50mm	Ø25 / 40mm	0.5mm	150mm
0.275-0.5"	0.275-0.35" / 0.35-0.425" / 0.425-0.5"	0.275" / 0.35" / 0.5"	0.06"	4"
0.5-0.8"	0.5-0.65" / 0.65-0.8"	0.65"	0.02"	6"
0.8-1.6"	0.8-1" / 1-1.2" / 1.2-1.6"	1" / 1.6"	0.02"	6"
0.8-2"	0.8-1" / 1-1.2" / 1.2-1.6" / 1.6-2"	1" / 1.6"	0.02"	6"

Digital internal micrometer set Type-F

Range	Individual range	Setting rings	A	Extension rods
50-100mm	50-63 / 62-75 / 75-88 / 87-100mm	Ø62 / 87mm	0.5mm	150mm
2-4"	2-2.5" / 2.5-3" / 3-3.5" / 3.5-4"	2.5" / 3.5"	0.02"	6"

Digital internal micrometer set Type-G

Range	Individual range	Setting rings	A	Extension rods
6-12mm	6-8 / 8-10 / 10-12mm	Ø6 / 8 / 10mm	1.5mm	100mm
12-20mm	12-16 / 16-20mm	Ø16mm	0.5mm	150mm
20-50mm	20-25 / 25-30 / 30-40 / 40-50mm	Ø25 / 40mm	0.5mm	150mm
50-100mm	50-63 / 62-75 / 75-88 / 87-100mm	Ø62 / 87mm	0.5mm	150mm
0.275-0.5"	0.275-0.35" / 0.35-0.425" / 0.425-0.5"	0.275" / 0.35" / 0.5"	0.06"	4"
0.5-0.8"	0.5-0.65" / 0.65-0.8"	0.65"	0.02"	6"
0.8-2"	0.8-1" / 1-1.2" / 1.2-1.6" / 1.6-2"	1" / 1.6"	0.02"	6"
2-4"	2-2.5" / 2.5-3" / 3-3.5" / 3.5-4"	2.5" / 3.5"	0.02"	6"

Reference:

Inside Micrometer Micrometer ring gauge Large Diameter Bore gauge Three Point Micrometer

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