Micrometers
• Effective for measuring workpiece features where access is difficult with a standard micrometer. • Measuring faces: Carbide tipped. Caliper Type Micrometers SERIES 143
• Equipped with Ratchet Stop for constant measuring force. • Includes standard bar (except 0-1 in and 0-25mm models)
B
143-121
SPECIFICATIONS Inch Order No.
Range (in)
Graduation (in)
Flatness (in)
Parallelism (in)
Accuracy* (in)
143-121 143-122 143-123
0 - 1 1 - 2 2 - 3
±0.00025 ±0.0003 ±0.00035
0.001
0.000012
0.00012
Metric
Range (mm) 0 - 25 25 - 50 50 - 75 75 - 100 100 - 125 125 - 150 150 - 175 175 - 200 200 - 225 225 - 250 250 - 275 275 - 300 L (Minimum measure length) 7.4
Graduation (mm)
Flatness (μm)
Parallelism (μm)
Order No.
Accuracy* (µm)
143-101 143-102 143-103 143-104 143-105 143-106 143-107 143-108 143-109 143-110 143-111 143-112
±5 ±6 ±7 ±8
3
4
±9
0.01
0.3
5
±10
±11
6
±12
c
25
a
60.8
b
72.4
7
7.4
* E MPE (ISO 3611:2023 and ASME B89.1.13-2013) 3.4 3.4
Jaw thickness 3
5.9
Analog Measuring range up to 300 mm DIMENSIONS
Unit: mm
Range (mm)
L a b C
Analog
c
L
25
a
b
66.9
0 - 25
0
(Minimum measure length)
7.4
7.4
25 - 50 25 50 - 75 50 75 - 100 75 100 - 125 100 125 - 150 125 150 - 175 150 175 - 200 175 200 - 225 200 225 - 250 225 250 - 275 250 275 - 300 275
Jaw thickness 3
3.4
3.4
20.8 10.6 28.6
5.9
16.3 15 32.5
Need Repair?
B-30
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