Page 74 - Mahr马尔量具完整

Micromar | Design Features

Reading example:
Carbide-tipped measuring faces Barrel scale Thimble Micrometer with 0.01 mm
Reference divisions
lines (sleeve)
Spindle Ratchet 0
Anvil
30
25

Frame
Sleeve 2.5
Locking device Thimble 0.28
Measuring 2.78 mm
result

Heat insulated handle

Micromar | Types of Micrometers Error limits G according to DIN 863-1

Mahr Micrometers are available with the following means Measuring range Error limit Measuring
of indication: force
G
a) Digital micrometer with digital display mm µm N
0 – 25 4 5 – 10
25 – 50 4 5 – 10
50 – 75 5 5 – 10
75 – 100 5 5 – 10

100 – 125 6 5 – 10
125 – 150 6 5 – 10
b) Mechanical micrometer with scale and dial
150 – 175 7 5 – 10
175 – 200 7 5 – 10

200 – 225 8 5 – 10
225 – 250 8 5 – 10
250 – 275 9 5 – 10
275 – 300 9 5 – 10

300 – 325 10 5 – 10
c) Mechanical micrometer with scale
325 – 350 10 5 – 10
350 – 375 11 5 – 10
375 – 400 11 5 – 10

400 – 425 12 5 – 10
425 – 450 12 5 – 10
450 – 475 13 5 – 10
475 – 500 13 5 – 10

70 Micromar | Micrometers