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Hand-held devices
Inside micrometers

Inside micrometers DIN 863

Application: ƒ Ident. No. 306–310: Measuring faces made of
Ident. No. 306–310: For measuring through-bores hardened steel
and short centring shoulders. ƒ Ident. No. 312–475:
Ident. No. 312–475: For measuring through holes ƒ Carbide measuring faces
and blind bores (from diameter 12 mm) and short ƒ Measures to the base of bore holes
centring shoulders. ƒ Ident. No. 340–475: Aluminium measuring head
Execution: scope of supply and services:
ƒ Scale with anti-glare, brushed chromium plated In a case
finish
ƒ Friction coupling for consistent, repeatable meas-
uring force
Min./max. length meas- 6-8 mm 8-10 mm 10-12 mm 12-16 mm 16-20 mm 20-25 mm 25-30 mm 30-40 mm
uring range
Error limit (µm) 4 4 4 4 4 4 4 4
Vernier scale 0.001 mm 0.001 mm 0.001 mm 0.001 mm 0.001 mm 0.005 mm 0.005 mm 0.005 mm
Measuring depth (mm) 58 58 58 64 64 68 68 76
Measuring spindle incre- 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5
ments (mm)
325
Ident. No.
330
308
316
320
306
310
Measuring equipment
31915... Unit price, € O. R. O. R. O. R. 312 O. R. O. R. O. R. O. R.
O. R.
Min./max. length meas- 40-50 mm 50-60 mm 60-70 mm 70-85 mm 85-100 mm 100-125 mm 125-150 mm 150-175 mm
uring range
Error limit (µm) 4 5 5 5 5 6 6 7
Vernier scale 0.005 mm 0.005 mm 0.005 mm 0.005 mm 0.005 mm 0.005 mm 0.005 mm 0.005 mm
Measuring depth (mm) 76 79 79 97 97 132 132 132
Measuring spindle incre-
ments (mm) 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5
360
340
350
Ident. No.
400
385
425
450
31915... Unit price, € O. R. O. R. O. R. 370 O. R. O. R. O. R. (O. R.)
O. R.
Min./max. length meas- 175-200 mm
uring range
Error limit (µm) 7
Vernier scale 0.005 mm
Measuring depth (mm) 132
Measuring spindle incre- 0.5
ments (mm)
475
Ident. No.
31915... Unit price, € (O. R.)
Prod. group 303
Inside micrometer sets DIN 863
Application: ƒ Carbide measuring faces
Ident. No. 610: For measuring through-bores and ƒ Friction coupling for consistent, repeatable meas-
short centring shoulders. uring force
Ident. No. 620–640: For measuring through holes, ƒ Measures to the base of bore holes
blind bores and short centring shoulders.
scope of supply and services:
Execution: In case, with setting rings
ƒ Scale with anti-glare, brushed chromium plated
finish Ident. No. 610
Min./max. length Digit increment (mm) Measuring depth (mm) Error limit (µm)
measuring range
610
Ident. No.
31915... 6-12 mm 0.001 58 4 Unit price, € O. R.
620
Ident. No.
31915... 12-20 mm 0.001 64 4 Unit price, € O. R.
630
Ident. No.
31915... 20-50 mm 0.005 68/74 4 Unit price, € O. R.
640
Ident. No.
31915... 50-100 mm 0.005 79/97 5 Unit price, € O. R.
Prod. group 303
Measurement depth extension
For ATORN 3-point internal micrometers
Min./max. length of application area 6-12 mm 12-20 mm 20-25 mm 25-100 mm
Length (mm) 75 75 150 150
31915... 31915... 31915... 31915...
ID no. ID no. ID no. ID no.
900 (O. R.) 910 O. R. 920 O. R. 930 O. R.
Unit price, €
Prod. group 303
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