JDY-2 Universal length measuring instrumentDetailed product description：

1、 Instrument usage
The JDY-2 universal length measuring instrument is mainly used for direct measurement and comparative measurement of the outer shape and inner hole size of various precision parts such as cylindrical, spherical, parallel planes, etc. It can also be used for special measurements such as inner and outer thread diameters. It is one of the essential basic length measuring instruments in various measuring rooms.

2、 Technical parameters:
1. Scope of use
External dimension measurement: 0-500 mm,
Internal dimension measurement: 1-200mm,
External thread measurement:<=180 mm,
Internal thread measurement: 16-140mm
2. Direct measurement range: 0-100mm
3. Reading microscope division value: 0.001mm
4. Instrument error
External dimension measurement: ± (1+L/200) μ m,
Internal dimension measurement: ± (1.5+L/200) μ m,
Indication stability:<=0.4 μ m
5. Instrument volume: 950 × 390 × 049 mm
6. Instrument weight: 85 kg
7. Standard accessories
Internal measuring device, electric eye device, standard ring gauge, external thread measuring device