Air Micrometers
Air Micrometer
Inner Diameter Measuring
Outer Diameter Measuring
Master
Long-seller

Air Micrometers

Variation

Direct Blow Type Inner Diameter Measuring Heads
【Measurement surface roughness of measured object】Less than Ra1.6
【Measuring diameter】Φ4 - Φ100
【Features】The most popular Non contact type Inner diameter measuring head.
Direct-blow Type (Non-contact) Inner Diameter Carbide Measuring Heads
【Measurement surface roughness of measured object】Less than Ra1.6
【Measuring diameter】Φ4 - Φ90
【Features】It is a non-contact type inner diameter measurement head with improved wear resistance.
Leaf Type (Contact Indirect Blow) Inner Diameter Measuring Heads
【Measurement surface roughness of measured object】Less than Ra3.2
【Measuring diameter】Φ4 - Φ120
【Features】Non-contact inner diameter measuring head that uses leaf contacts.
It use case the width of measurement area is narrow, or the measurement area is rough surface.
Small hole type inner diameter measuring heads
【Measurement surface roughness of measured object】Less than Ra0.8
【Measuring diameter】Φ1 - Φ20
【Features】Non-contact inner diameter measuring head with a small-diameter nozzle. Useful when the object being measured has a small diameter, the width of the measurement point is narrow, or the measurement tolerance is 10 μm or less.
Small hole type inner diameter measuring heads
【Measurement surface roughness of measured object】Less than Ra0.8
【Measuring diameter】Φ1 - Φ20
【Features】Non-contact inner diameter measuring head with a small-diameter nozzle. Useful when the object being measured has a small diameter, the width of the measurement point is narrow, or the measurement tolerance is 10 μm or less.
Hand Type Outer Diameter Measuring Heads
【Measurement surface roughness of measured object】Less than Ra1.6
【Measuring diameter】Φ15 - Φ100
【Features】The most popular Non contact type Outer diameter measuring head.
Hand Type Outer Diameter Measuring Heads
【Measurement surface roughness of measured object】Less than Ra1.6
【Measuring diameter】Φ15 - Φ100
【Features】The most popular Non contact type Outer diameter measuring head.
Ring Type Outer Diameter Measuring Heads
【Measurement surface roughness of measured object】Less than Ra1.6
【Measuring diameter】Φ4 - Φ50
【Features】Ring type of outer diameter measuring head. Used when the object being measured is small.
Stand Type Outer Diameter Measuring Heads
【Measurement surface roughness of measured object】Less than Ra1.6
【Measuring diameter】Φ5 - Φ70
【Features】Stand type of outer diameter measuring head. Suitable for measuring objects like long, narrow shafts.
High-precision JET
【Features】Inner and outer diameter measurement JET that improves the repeatability accuracy by replacing adopting the multiway measurement nozzle. Used in combination with an A/E converter.

List of Measuring Methods

Diameter/Roundness

Inner Diameter

空気マイクロメータ、径・真円度
空気マイクロメータ、径・真円度
空気マイクロメータ、径・真円度
Outer Diameter
空気マイクロメータ、径・真円度
The inner diameter is measured by inserting the plug type measuring head with air nozzles on both sides into the workpiece, and the taper is measured by moving the head in the axial direction. Roundness (cylindricity) can be measured by rotating the measuring head one revolution. Contact type indirect air blow head (leaf type) is used when the measuring surface is confined or rough. Inner diameter can be measured by inserting a plug type measuring head with air blow nozzles on both sides. Taper can be measured by moving the head in the axial direction.
Average Diameter/Triangle Depth
Inner Diameter
空気マイクロメータ、平均径・トライアングル
Outer Diameter
空気マイクロメータ、平均径・トライアングル
空気マイクロメータ、平均径・トライアングル
空気マイクロメータ、深さ
The average inner diameter can be measured by placing three or more jets at equiangular locations. Roundness can be measured by rotating the workpiece with three nozzles. 3 The average outer diameter can be measured by placing three or more nozzles at equiangular locations. Roundness deformation can be measured by rotating the workpiece. Roundness can be measured by mounting a nozzle on a stand and rotating the workpiece on a V stand or a measuring stand. Use a dedicated measuring instrument with a precision head.
Depth is measured by simply inserting the workpiece.
Flatness Concentricity / Eccentricity
空気マイクロメータ、平面度
空気マイクロメータ、同心度・偏肉
Move a workpiece to the right and left on a nozzle built-in measuring stand, or use a dedicated measuring unit with several built-in nozzles to measure flatness. Concentricity can be measured by measuring the wall thickness.
Squareness Parallelism
Inner Diameter
空気マイクロメータ、直角度
Outer Diameter
空気マイクロメータ、直角度
Angled Items
空気マイクロメータ、直角度
空気マイクロメータ、平行度
Squareness can be measured by rotating a dedicated measuring head with a stepped nozzle as shown above 180°. Squareness is measured by providing a nozzle on one side of the workpiece. Parallelism can be measured by using a similar procedure as that use to measure squareness.
Taper Height Thickness
Inner Diameter
空気マイクロメータ、テーパ
Outer Diameter
空気マイクロメータ、テーパ
空気マイクロメータ、高さ
空気マイクロメータ、厚さ
Taper can be measured from the difference in float position by simply inserting the workpiece. Measurement can be performed from a nozzle mounted on a stand. Using a measuring head with air blow in both sides eliminates error due to dust or a warp.
Distance Between Centers Multi-Point Simultaneous Measurement
空気マイクロメータ、心間
空気マイクロメータ、心間
Distance between centers is measured from the difference in movement of each float by simply inserting the workpiece. A dedicated measuring instrument is used. The dimensions at multiple points can be simultaneously measured by using a dedicated measuring instrument.
This enables one-glance judgment of whether or not the workpiece is within tolerances by simply placing it in the device.
空気マイクロメータ 測定方法一覧

Direct-blow Type (Non-contact) Inner Diameter Measuring Heads

空気マイクロメータ 直吹式(無接触)内径測定ヘッド

The most commonly used type of non-contact inner diameter measuring head.

Multiple types are available with different nozzle positions to suit the measurement shape and position.

* Ensure that the measurement surface roughness of the measured object is less than Ra1.6.

Configurations A/E Converter Deltair 

Configurations A/E Converter Deltair

K Type (for small holes)

Suitable for measuring small holes of Φ 4 to Φ 7 diameter.

K Type (for small holes)
Model Nominal Dimension Φ D L1 L2 L3 L4 Φ A
K04 type Φ 4 ≤ Φ D ≤ Φ 7 4 29 50 79 12
K10 type Φ 4 ≤ Φ D ≤ Φ 7 10 35 50 85 12
B Type

B Type

The nozzle hole is located 3 or 5 mm from the head tip, allowing measurement of shallow holes or the far end of holes.

B Type
Model Nominal Dimension Φ D L1 L2 L3 L4 φ A
B03 type
B05 type
Φ 7 ≤ Φ D ≤ Φ 10 B03=3
B05=5
B03=23
B05=25
120 B03=143
B05=145
12
Φ 10 < Φ D ≤ Φ 18 B03=3
B05=5
25 120 145 12
Φ 18 < Φ D ≤ Φ 40 B03=3
B05=5
30 100 130 18
Φ 40 < Φ D ≤ Φ 70 B03=3
B05=5
30 100 130 25
Φ 70 < Φ D ≤ Φ 100 B03=3
B05=5
35 100 135 32
T Type

The nozzle hole is located 10 to 30 mm from the head tip, making it suitable mainly for through-hole measurement.

T Type
Model Nominal Dimension Φ D L1 L2 L3 L4 Φ A
T10 type
T15 type
T20 type
T25 type
T30 type
Φ 7 ≤ Φ D ≤ Φ 10 T10=10
T15=15
T20=20
T10=35
T15=35
T20=40
120 T10=155
T15=155
T20=160
12
Φ 10 < Φ D ≤ Φ 18 T10=10
T15=15
T20=20
T10=35
T15=35
T20=40
120 T10=155
T15=155
T20=160
12
Φ 18 < Φ D ≤ Φ 40 T10=10
T15=15
T25=25
T10=35
T15=35
T25=50
100 T10=135
T15=135
T25=150
18
Φ 40 < Φ D ≤ Φ 70 T10=10
T15=15
T25=25
50 100 150 25
Φ 70 < Φ D ≤ Φ 100 T10=10
T15=15
T30=30
60 100 160 32

Direct-blow Type (Non-contact) Inner Diameter Carbide Measuring Heads

Direct-blow Type (Non-contact) Inner Diameter Carbide Measuring Heads

Non-contact inner diameter measuring head with enhanced wear resistance through the use of carbide guide sections or carbide-faced guide sections.

* Ensure that the measurement surface roughness of the measured object is less than Ra1.6.

Configurations A/E Converter Deltair 

T-CK Type (for small holes)

T-CK Type (for small holes)

Suitable for measuring small holes of Φ 4 to Φ 7 diameter.

T-CK Type (for small holes)
Model Nominal Dimension Φ D L1 L2 L3 L4 Φ A
T-CK05 type Φ 4 ≤ Φ D ≤ Φ 7 5 35 50 85 12
T-CK10 type Φ 4 ≤ Φ D ≤ Φ 7 10 35 50 85 12
T-CB Type

T-CB Type

The nozzle hole is located 5 mm from the head tip, allowing measurement of shallow holes or the far end of holes.

* Carbide-faced guide sections used for diameters exceeding Φ 30.

T-CB Type
Model Nominal Dimension Φ D L1 L2 L3 L4 Φ A
T-CB05 type Φ 7 ≤ Φ D ≤ Φ 10 5 45 120 165 12
Φ 10 < Φ D ≤ Φ 18 5 45 120 165 12
Φ 18 < Φ D ≤ Φ 30 5 45 100 145 18
Φ 30 < Φ D ≤ Φ 70 5 35 100 135 25
Φ 70 < Φ D ≤ Φ 90 5 40 100 140 32
T-CT Type

T-CT Type

The nozzle hole is located 10 to 25 mm from the head tip, making it suitable mainly for through-hole measurement.

* Carbide-faced guide sections used for diameters exceeding Φ 30.

T-CT Type
Model Nominal Dimension Φ D L1 L2 L3 L4 Φ A
T-CT10 type
T-CT20 type
T-CT25 type
Φ 7 ≤ Φ D ≤ Φ 10 T-CT10=10
T-CT20=20
45 120 165 12
Φ 10 < Φ D ≤ Φ 18 T-CT10=10
T-CT20=20
45 120 165 12
Φ 18 < Φ D ≤ Φ 30 T-CT10=10
T-CT20=20
45 100 145 18
Φ 30 < Φ D ≤ Φ 70 T-CT10=10
T-CT25=25
50 100 150 25
Φ 70 < Φ D ≤ Φ 90 T-CT10=10
T-CT25=25
50 100 150 32

Leaf Type (Contact Indirect-blow) Inner Diameter Measuring Heads

Leaf Type (Contact Indirect-blow) Inner Diameter Measuring Heads

Contact-type inner diameter measuring head that uses leaf contacts.

Mainly used when the surface being measured is rough or the width of the measurement position is narrow.

* Ensure that the measurement surface roughness of the measured object is less than Ra3.2.

* There is the risk of contact scratches depending on the type of material of the workpiece.

Configurations A/E Converter Deltair 

Configurations A/E Converter Deltair

BR Type

The nozzle hole is located 2 mm from the contact, allowing measurement of shallow holes or the far end of holes.

BR Type
Model Nominal Dimension Φ D L1 L2 L3 L4 φ A
BR02 type Φ 10 ≤ Φ D ≤ Φ 14 2 50 120 170 12
Φ 14 < Φ D ≤ Φ 18 2 50 120 170 12
Φ 18 < Φ D ≤ Φ 40 2 50 100 150 18
Φ 40 < Φ D ≤ Φ 90 2 50 100 150 25
Φ 90 < Φ D ≤ Φ 100 2 50 100 150 32
TR Type

TR Type

The nozzle hole is located 9 or 15 mm from the contact, making it suitable mainly for through-hole measurement.

TR Type
Model Nominal Dimension Φ D L1 L2 L3 L4 φ A
TR09 type
TR15 type
Φ 10 ≤ Φ D ≤ Φ 14 9 50 120 170 12
Φ 14 < Φ D ≤ Φ 18 9 50 120 170 12
Φ 18 < Φ D ≤ Φ 40 15 50 100 150 18
Φ 40 < Φ D ≤ Φ 75 15 50 100 150 25
Φ 75 < Φ D ≤ Φ 90 15 60 100 160 25
Φ 90 < Φ D ≤ Φ 100 15 60 100 160 32

Small Hole Type Inner Diameter Measuring Heads

Small Hole Type Inner Diameter Measuring Heads

Non-contact inner diameter measuring head with a small-diameter nozzle.

Useful when the object being measured has a small diameter, the width of the measurement point is narrow, or the measurement tolerance is 10 μm or less.

* Ensure that the measurement surface roughness of the measured object is less than Ra0.8.

* Use this measuring head in combination with an AE converter.

Configurations A/E Converter

Φ 1 ≤ Φ D ≤ Φ 7
Φ 1 ≤ Φ D ≤ Φ 7
Φ 4 < Φ D ≤ Φ 10
Φ 4 < Φ D ≤ Φ 10
Φ 10 < Φ D ≤ Φ 18
Φ 10 < Φ D ≤ Φ 18
Φ 18 < Φ D ≤ Φ 20
Φ 18 < Φ D ≤ Φ 20
KB Type
Model Model Nominal Dimension Φ D L1 L2 L3 L4 Φ A
KB type KB type Φ 1 ≤ Φ D ≤ Φ 7 5 9 50 59 12
Φ 4 < Φ D ≤ Φ 10 12 20 50 75 12
Φ 10 < Φ D ≤ Φ 18 10 35 120 155 12
Φ 18 < Φ D ≤ Φ 20 10 35 100 135 18
Product Lineup
Product code Nominal Dimension Φ D Applicable Model
995501 Φ 1 ≤ Φ D ≤ Φ 1.5 KB
995502 Φ 1.5 < Φ D ≤ Φ 2 KB
995503 Φ 2 < Φ D ≤ Φ 3 KB
995504 Φ 4 < Φ D ≤ Φ 10 KB
995505 Φ 3 < Φ D ≤ Φ 4 KB
995510 Φ 10 < Φ D ≤ Φ 15 KB
995515 Φ 15 < Φ D ≤ Φ 20 KB

Masters for Inner Diameter Measuring Heads

Masters for Inner Diameter Measuring Heads
Masters for Inner Diameter Measuring Heads
Basic specifications
Nominal Dimension Φ D Φ D 0 T
Φ 4 ≤ Φ D ≤ Φ 5 30 10
Φ 5 < Φ D ≤ Φ 8 12
Φ 8 < Φ D ≤ Φ 10 34 15
Φ 10 < Φ D ≤ Φ 14
Φ 14 < Φ D ≤ Φ 20 42
Φ 20 < Φ D ≤ Φ 26 50
Φ 26 < Φ D ≤ Φ 32 58 20
Φ 32 < Φ D ≤ Φ 38 66
Φ 38 < Φ D ≤ Φ 44 74 25
Φ 44 < Φ D ≤ Φ 50 84
Φ 50 < Φ D ≤ Φ 65 104
Φ 65 < Φ D ≤ Φ 80 124
Φ 80 < Φ D ≤ Φ 95 144 30
Φ 95 < Φ D ≤ Φ 100 164
KB type
Nominal Dimension Φ D Φ D 0 T
Φ 1 ≤ Φ D ≤ Φ 3 16 3
Φ 3 < Φ D ≤ Φ 6 20 4
Φ 6 < Φ D ≤ Φ 10 25 5
Φ 10 < Φ D ≤ Φ 14 32 7
Φ 14 < Φ D ≤ Φ 18 40
Φ 18 < Φ D ≤ Φ 20 50

Usage Examples of Inner Diameter Measuring Heads

Select from the extension range of measuring heads to suit conditions like measurement hole depth or roughness.

Usage Examples of Inner Diameter Measuring Heads
Ordinary

T10, 15, 25, 30 type

 

空気マイクロメータ、T10、15、25、30 type

B03, 05 type

 

空気マイクロメータ、B03、05 type
Determining Measuring Position

T10, 15 type

 

空気マイクロメータ、T10、15 type
Rough Surface

TR09, 15 type

 

空気マイクロメータ、TR09、15 type
Small Diameter

KB type

 

空気マイクロメータ、KB type

K04 type

 

空気マイクロメータ、K04 type
When Mounted on Stand

Replacement bushing
Bushing inner diameter Φ 12.5 is for Φ 12 handle
Product code 0996501
Bushing inner diameter Φ 18.5 is for Φ 18 handle
Product code 0996502

 

空気マイクロメータ、スタンドに取り付けて使用する場合

Horizontal stand 100H
Product code 0995600

 

空気マイクロメータ、スタンドに取り付けて使用する場合

Hand Type Outer Diameter Measuring Heads

Hand Type Outer Diameter Measuring Heads

Hand Type Outer Diameter Measuring Heads are useful for handle type measurements.

The most commonly used type, and a model with carbide-faced V stand is also available for enhanced durability.

* Ensure that the measurement surface roughness of the measured object is less than Ra1.6.

Combination A/E Converter Deltair

H Type

H Type

Measurements are made by simply clamping the object being measured, and it is suitable for measuring workpieces like the outer diameter of crankshaft pins.

H Type
Model Nominal Dimension Φ D T1 H1 L1 L2 L3 L4 T2 φ A
H type Φ 15 ≤ Φ D ≤ Φ 20 17.5 5 60 68 110 178 20 20
Φ 20 < Φ D ≤ Φ 60 15 5 65 73 110 183 20 20
Φ 60 < Φ D ≤ Φ 80 15 5 70 78 110 188 22 22
Φ 80 < Φ D ≤ Φ 100 15 5 80 88 110 198 22 22
T-CH Type

T-CH Type

Carbide-faced V stand provides even greater durability than the H Type.

T-CH Type
Model Nominal Dimension Φ D T1 H1 L1 L2 L3 L4 T2 φ A
T-CH type Φ 15 ≤ Φ D ≤ Φ 20 17.5 5 60 68 110 178 20 20
Φ 20 < Φ D ≤ Φ 60 15 5 65 73 110 183 20 20
Φ 60 < Φ D ≤ Φ 80 15 5 70 78 110 188 22 22
Φ 80 < Φ D ≤ Φ 100 15 5 80 88 110 198 22 22

Masters for Hand Type Outer Diameter Measuring Heads

One each of large and small master for a hand-type measuring head is mounted on the master stand. 

空気マイクロメータ ハンド式外径測定ヘッド用マスタ
空気マイクロメータ ハンド式外径測定ヘッド用マスタ
Basic specifications
Nominal Dimension Φ D ℓ1 ℓ2 L1 L2 H
Φ 15 ≤ Φ D ≤ Φ 20 20 35 22 70 10
Φ 20 < Φ D ≤ Φ 30 20 35 40 70 10
Φ 30 < Φ D ≤ Φ 45 20 35 50 70 10
Φ 45 < Φ D ≤ Φ 60 20 40 60 80 12
Φ 60 < Φ D ≤ Φ 80 25 45 80 90 15
Φ 80 < Φ D ≤ Φ 100 25 45 100 90 15

Ring Type Outer Diameter Measuring Heads

Ring Type Outer Diameter Measuring Heads

Ring type of outer diameter measuring head.

The object being measured is inserted into the ring-shaped measuring head for measurement.

Used when the object being measured is small.

* Ensure that the measurement surface roughness of the measured object is less than Ra1.6.

Configurations A/E Converter Deltair

R Type

R Type

The object being measured is simply inserted into the ring-shaped measuring head for measurement.

R Type
Model Nominal Dimension Φ D T1 L2 φ A
R type Φ 4 < Φ D ≤ Φ 10 5 20 52
Φ 10 < Φ D ≤ Φ 20 5 20 62
Φ 20 < Φ D ≤ Φ 30 5 20 72
Φ 30 < Φ D ≤ Φ 40 5 20 82
Φ 40 < Φ D ≤ Φ 50 5 20 92
RH Type

RH Type

R Type with handle attached.

RH Type
Model Nominal Dimension Φ D T1 H1 L1 L2 L3 L4 T2 φ A
RH type Φ 4 < Φ D ≤ Φ 10 5 20 24 110 160 52 20 20
Φ 10 < Φ D ≤ Φ 20 5 20 29 110 170 62 20 20
Φ 20 < Φ D ≤ Φ 30 5 20 34 110 180 72 20 22

Stand Type Outer Diameter Measuring Heads

Stand Type Outer Diameter Measuring Heads

Stand type of outer diameter measuring head.

The object being measured is placed on the V stand for measurement.

Suitable for measuring objects like long, narrow shafts.

* Ensure that the measurement surface roughness of the measured object is less than Ra1.6.

Configurations A/E Converter Deltair

S Type

S Type

The object being measured is simply inserted by sliding it into the ring-shaped measuring head for measurement.

S Type
Model Nominal Dimension Φ D L1 L2 L3 L4 L5 L6
S type Φ 5 ≤ Φ D ≤ Φ 10 30 45 50 40 15 95
Φ 10 < Φ D ≤ Φ 20 35 55 60 50 15 115
Φ 20 < Φ D ≤ Φ 30 45 70 70 50 20 120
Φ 30 < Φ D ≤ Φ 40 50 80 80 50 20 120
Φ 40 < Φ D ≤ Φ 50 55 90 90 50 20 120

SH Type

For measurement, clamp the object being measured using a similar method to the H Type of Hand Type Outer Diameter Measuring Head.

SH Type
Model Nominal Dimension Φ D L1 L2 L3 L4 H1 H2 H3
SH type Φ 20 < Φ D ≤ Φ 35 5 20 50 100 70 78 93
Φ 35 < Φ D ≤ Φ 45 5 20 50 100 70 78 -
Φ 45 < Φ D ≤ Φ 60 5 20 60 120 70 78 -
Φ 60 < Φ D ≤ Φ 70 5 22 60 120 80 88 -

T-C SH Type

Carbide-faced V stand provides even greater durability than the SH Type.

T-C SH Type
Model Nominal Dimension Φ D L1 L2 L3 L4 H1 H2 H3
T-C SH type Φ 20 < Φ D ≤ Φ 35 5 20 50 100 70 78 93
Φ 35 < Φ D ≤ Φ 45 5 20 50 100 70 78 -
Φ 45 < Φ D ≤ Φ 60 5 22 60 120 70 78 -
Φ 60 < Φ D ≤ Φ 70 5 22 60 120 80 88 -

Masters for Ring Type/Stand Type Outer Diameter Measuring Heads

Masters for Ring Type/Stand Type Measuring Heads comprise a set of one large master and one small master.

The large and small masters are used interchangeably to adjust magnification.

Basic specifications
Nominal Dimension Φ D Φ d ℓ1 ℓ2 ℓ3
Φ 4 ≤ Φ D ≤ Φ 6 D-1 25 25 50
Φ 6 < Φ D ≤ Φ 10 5
Φ 10 < Φ D ≤ Φ 15 8
Φ 15 < Φ D ≤ Φ 20 12
Φ 20 < Φ D ≤ Φ 32 18 30 15 45
Φ 32 < Φ D ≤ Φ 45 28
Φ 45 < Φ D ≤ Φ 50 40

Handle Unit

Handle Unit

Available with a long handle that can be used if the standard handle cannot reach the measurement position when measuring deep holes.

Standard Ring Stopper

Ring stoppers are used to keep the measurement depth fixed. Used for clamping the measuring head or handle.

Standard Ring Stopper
Standard Ring Stopper

High-precision JET

Highly accurate JET is an interval and outer diameter measurement JET that improves the repeat accuracy by replacing a conventional one diameter measurement nozzle, and adopting the multiway measurement nozzle.

Used in combination with an A/E converter.

Supports supply pressure of 0.25 MPa. 

A stand is also available to suit the intended use.

<Typical Configuration>

for inner diameter
(for inner diameter)
Outer diameter type
(Outer diameter type)
Basic specifications
Product code Nominal Dimension Φ D A Type B Type C Type
Inner Diameter Outer Diameter Measuring range Repeatability Measuring range Repeatability Measuring range Repeatability
4300613 - Φ 1.5 ≤ Φ D < Φ 2.5 5 μm 0.2 μm - - - -
4300614 4300617 Φ 2.5 ≤ Φ D < Φ 4 10 μm 0.2 μm - - - -
4300615 4300618 Φ 4 ≤ Φ D < Φ 7 10 μm 0.1 μm 15 μm 0.15 μm 20 μm 0.2 μm
4300616 4300619 Φ 7 ≤ Φ D < Φ 14 10 μm 0.1 μm 15 μm 0.15 μm 20 μm 0.2 μm

Note: Contact your sales representative if you require diameters over Φ14, installing multiple units or have questions about the installation method.

Note: Φ D = Measured diameter

High-precision JET Master

The high-precision JET masters are used in two-master sets, one upper limit and one for lower limit. 

Upper limit and lower limit masters are changed to adjust magnification. 

A middle limit master is also available when required.

High-precision JET Master
Basic specifications
Product code Nominal Dimension Φ D Φ D0 T
4300620 Φ 1.5 ≤ Φ D ≤ Φ 3 16 3
Φ 3 < Φ D ≤ Φ 4 20 4
4300621 Φ 4 < Φ D ≤ Φ 5 30 10
4300622 Φ 5 < Φ D ≤ Φ 8 30 12
Φ 8 < Φ D ≤ Φ 14 34 15
Basic specifications
Product code Nominal Dimension Φ D φ d ℓ1 ℓ2 ℓ3
4300623 Φ 2.5 ≤ Φ D ≤ Φ 6 5 25 25 50
4300624 Φ 6 < Φ D ≤ Φ 10 5 25 25 50
4300625 Φ 10 < Φ D ≤ Φ 14 8 25 25 50

Multipoint Simultaneous Measuring Heads

Multiple measurement items can be made at the same time with a single instrument.

Heads can be tailored to suit the customer's specific requirements.

Example of Measuring Heads

4-heads for piston diameter, squareness and coaxiality measurements
空気マイクロメータ、4連式ピストン内径、直角度、同軸度測定
Measuring items
空気マイクロメータ、内径測定(2断面)
Inner diameter measurement (2 cross-sections)
Top/bottom mounted nozzles measure the inner diameter in 2 cross-sections by simply inserting the workpiece.
空気マイクロメータ、直角度測定
Squareness measurement
Squareness is measured with stepped nozzles. (workpiece rotated 180°)
空気マイクロメータ、同軸度測定
Coaxiality measurement
Coaxiality is measured by measuring the wall thickness. (workpiece rotated one revolution)
4-heads for piston thickness measurements
空気マイクロメータ、4連式ピストン厚み測定
4-heads for piston thickness measurements
空気マイクロメータ、厚み測定(4箇所)
Thickness measurement (4 locations)
Top/bottom mounted nozzles measure the thickness of the workpiece.
Thickness is measured in 4 locations by simply placing the workpiece of the stand.
5-heads for cylinder groove width measurements
空気マイクロメータ、5連式シリンダ溝幅測定
Measuring items
空気マイクロメータ、5連式シリンダ溝幅測定
Width measurement (5 locations)
Nozzles mounted at each end of the head plate measure the width of the workpiece. Width is measured in 5 locations by simply placing the workpiece of the head plate.
4-heads for shaft outer diameter measurements
空気マイクロメータ、4連式シャフト外径測定
Measuring items
空気マイクロメータ、外径測定(4箇所)
Outer diameter measurement (4 locations)
Nozzles mounted on both sides measure the outer diameter thickness of the workpiece. Outer diameter is measured in 4 locations by simply placing the workpiece of the head V stand.
Cylinder center distance measurement
空気マイクロメータ、シリンダ芯間測定
Measuring items
空気マイクロメータ、芯間測定
Center distance measurement
Measures the center distances of the workpiece.
Measurements are made by simply inserting the workpiece.
Cylinder inner diameter, squareness, and cylindricity measurement
空気マイクロメータ、シリンダ内径、直角度、円筒度測定
Measuring items
空気マイクロメータ、内径(2断面)、円筒度測定
Inner diameter (2 cross-sections), cylindricity measurements
Top/bottom mounted nozzles measure 2 cross-sections of the inner diameter and cylindricity by simply inserting the workpiece.
空気マイクロメータ、直角度測定
Squareness measurement
Squareness is measured with stepped nozzles.
Nozzles are mounted in 2 locations, so measurement is made by simply inserting the workpiece without having to rotate it.
Rotor groove width measurement
空気マイクロメータ、ローター溝幅測定
Measuring items
空気マイクロメータ、幅測定
Width measurement
Nozzles mounted at each end of the head plate measure the width of the workpiece. Width is measured by simply placing the workpiece of the head plate.
Bearing flatness measurement
空気マイクロメータ、ベアリング平面度測定
Measuring items
空気マイクロメータ、平面度測定
Flatness measurement
Five nozzles measure the flatness of the workpiece.
Measurements are made by simply placing the workpiece.