• Titanium-coated measuring pins on the three- point type (over 6mm range models) provide excellent durability and impact resistance and allow the instrument to measure right to the bottom of a blind
  • Three-point bore micrometer with measuring range 6mm or longer allows stable measurement through automatic
  • Can measure deep holes using an Extension rod (optional) which is available on models over 6mm (.275″) measuring
  • Ratchet Stop ensures constant-force, repeatable measurement.
  • Setting Rings for accurately setting the instrument are optional. Refer to page C-47 for details.

 

Range (mm) L3 (mm) L4 (mm) L5 (mm)
2 – 6 — — 2
6 – 12 2 or below — 2.5
12 – 20

 

0.3 or below

 5.6 3.5
20 – 30 8.3 5.2
30 – 50 13.0 10.0
50 – 100 17.0 14.0
100 – 300 12.4 or below 21.0 13.8

Two point Internal Micrometers

 

SPECIFICATIONS

Metric

Order No. Range Graduation Accuracy*1 Extension Rod (optional)

(Two-point)

368-001

 

2 – 2.5mm

 

 

 

 

 

0.001mm

 

 

 

 

 

±2µm (within 2µm)

 

 

 

—
368-002 2.5 – 3mm
368-003 3 – 4mm
368-004 4 – 5mm
368-005 5 – 6mm

(Three-point)

368-161

 

6 – 8mm

 

952322 (100mm)
368-162 8 – 10mm
368-163 10 – 12mm
368-164 12 – 16mm

 

 

 

 

 

 

 

0.005mm

 952621 (150mm)
368-165 16 – 20mm
368-166 20 – 25mm

 

 

 

±3µm (within 3µm)

 

952622 (150mm)
368-167 25 – 30mm
368-168 30 – 40mm
368-169 40 – 50mm
368-170 50 – 63mm

 

 

 

 

 

952623 (150mm)
368-171 62 – 75mm
368-172 75 – 88mm
368-173 87 – 100mm
368-174 100 – 125mm

 

 

 

±5µm (within 5µm)
368-175 125 – 150mm
368-176 150 – 175mm
368-177 175 – 200mm
368-178 200 – 225mm
368-179 225 – 250mm
368-180 250 – 275mm
368-181 275 – 300mm

Inch

Order No. Range Graduation Accuracy*1 Extension Rod (optional)
(Two-point) 368-021 .08″ – .1″

 

 

 

 

.0001″

 

 

 

 

 

 

±.0001″ (within .0001″)

 

 

 

—
368-022 .1″ – .12″
368-023 .12″ – .16″
368-024 .16″ – .2″
368-025 .2″ – .24″
368-026 .24″ – .28″

(Three-point)

368-261

 

.275″ – .35″

 

952322 (100mm)
368-262 .35″ – .425″
368-263 .425″ – .5″
368-264 .5″ – .65″

 

 

 

 

 

 

 

.0002″

 952621 (150mm)
368-265 .65″ – .8″
368-266 .8″ – 1″

 

 

 

±.00015″ (within .00015″)

 

952622 (150mm)
368-267 1″ – 1.2″
368-268 1.2″ – 1.6″
368-269 1.6″ – 2″
368-270 2″ – 2.5″

 

 

 

 

 

952623 (150mm)
368-271 2.5″ – 3″
368-272 3″ – 3.5″
368-273 3.5″ – 4″
368-274 4″ – 5″

 

 

 

±.00025″ (within .00025″)
368-275 5″ – 6″
368-276 6″ – 7″
368-277 7″ – 8″
368-278 8″ – 9″
368-279 9″ – 10″
368-280 10″ – 11″
368-281 11″ – 12″

*1 Excluding quantizing error.
Accuracy: values measured across the entire measuring face.
Maximum difference: differences between the maximum and minimum values.
* Setting ring and extension rod:
* It is not advisable to use measuring heads other than as supplied as a standard accessory, or widen a measuring range by using any other multiple sub-measuring (The measuring accuracy in such cases is not guaranteed.)

DIMENSIONS

Two point Internal Micrometers

Range L2 L1
2 – 2.5, 2.5 – 3mm 12 103.5 – 104
3 – 4, 4 – 5, 5 – 6mm 22 113 – 114

External appearance differs depending on the measuring range.

Two point Internal Micrometers

Range L2 L1
6 – 8, 8 – 10, 10 – 12mm 59 102 – 104
12 – 16, 16 – 20mm 82 126 – 130
20 – 25, 25 – 30mm 94 137 – 142
30 – 40, 40 – 50mm 102 145 – 155
50 – 63, 62 – 75, 75 – 88, 87 – 100mm 105 150 – 163

100 – 125, 125 – 150, 150 – 175, 175 – 200,

200 – 225, 225 – 250, 250 – 275, 275 – 300mm

 161 227 – 252

External appearance differs depending on the measuring range.

Two point Internal Micrometers

Application using an extension rod
For details of Special-order Products, refer to page C-49.