Micrometers

Three-point inside micrometer for precise measurement of the inside diameter of cylinders or tubes. The three-point measuring principle allows bores to be measured at three locations, enabling particularly accurate and repeatable measurements. The robust construction ensures a long service life, even with regular use in the workshop.

Accuracies according to DIN 863
Reading: 0.001 mm up to 12 mm; 0.005 mm from 12 mm
suitable for blind holes and through holes
Carbide measuring surfaces
Reading parts matt chrome-plated
Emotional ratchet
with adjustment ring and extension
in aluminum case

*Design as a two-point internal micrometer

✅ Exact results – thanks to three symmetrically arranged measuring surfaces for perfect self-centering
✅ High measuring reliability – measuring errors due to tilting are reliably excluded
✅ Versatile – for precise control of cylinder bores, fits and inner diameters
✅ Robust & durable – high-quality materials for lasting accuracy

Measuring range (mm)	Reading (mm)	accuracy (mm)	A (mm)	L (mm)	Adjustment ring (mm)
3-4*	0.001	0.004	-	22.5	4.0
4-5*	0.001	0.004	-	22.5	5.0
5-6*	0.001	0.004	-	22.5	6.0
6-8	0.001	0.004	1.4	55	6.0
8-10	0.001	0.004	1.4	55	8.0
10-12	0.001	0.004	1.4	55	10.0
12-16	0.005	0.005	0.5	80	16.0
16-20	0.005	0.005	0.5	80	16.0
20-25	0.005	0.005	0.5	90	25.0
25-30	0.005	0.005	0.5	90	25.0
30-40	0.005	0.005	0.5	97	40.0
40-50	0.005	0.005	0.5	97	40.0
50-63	0.005	0.005	0.5	115	62.0
62-75	0.005	0.005	0.5	115	62.0
75-88	0.005	0.005	0.5	115	87.0
87-100	0.005	0.005	0.5	115	87.0