JDY-2 Universal Length Measuring Instrument Introduction: JDY-2 is mainly used for direct measurement and comparative measurement of the outer shape and inner hole dimensions of various precision parts such as cylinders, spheres, and parallel planes. It can also be used for various special measurements such as the pitch diameter of internal and external threads. It is one of the essential basic length measuring instruments in measuring rooms at all levels. Technical parameters: 1. Scale division value of reading microscope: 0.001mm 2. The division value of the differential cylinder on the workbench is 0.01mm 3. Direct measurement range: （0-100）mm 4. Measurement range
① Measurement of external dimensions a. When not using a needle holder: （0-500）mm b. When using a needle holder: up to 180mm
② Internal dimension measurement a. External thread measurement: ≤ 180mm b. Internal thread measurement: （16-140）mm
③ Thread diameter measurement a. Outer: up to 180mm b. Inside: When the depth ranges from (10-50) mm to (10-200) mm 5. Pressure measurement: Generally, 150 and 250 grams, using an electric eye device 6. Stability of instrument indication: ＜ 0.4μm 7. Instrument error (L-dimensional measurement value, unit: mm):
① External dimension measurement: （1+L/200）μm
② Internal dimension measurement: （1.5+L/200）μm
③ Instrument error during comparative measurement: ± 0.25 μ m 8. Universal worktable adjustment range:
① Height: （0-150）mm
② Horizontally: （0-25）mm 9. Top needle holder:
① Maximum span: 200mm
② Maximum diameter of the measured cylindrical part: 180mm (when the length is less than 85mm)
Introduction: JDY-2 is mainly used for direct measurement and comparative measurement of the outer shape and inner hole dimensions of various precision parts such as cylinders, spheres, and parallel planes. It can also be used for various special measurements such as the pitch diameter of internal and external threads. It is one of the essential basic length measuring instruments in measuring rooms at all levels.
