JD25-D Digital Universal Length Measuring InstrumentDetailed product description：

JD25-D digital universal length measuring instrument

1、 Characteristics:
The base is made of high-quality cast iron, which has undergone long-term natural aging treatment and has good stability.
Adopting optimized design to ensure good performance and high accuracy from a structural perspective.
The attachments are complete and versatile.
Using grating digital display technology, measuring length is displayed in numbers, which is intuitive and convenient.
The grating lighting system uses infrared light-emitting devices with low voltage, low current, small size, and long lifespan as the light source.
The instrument applies the Abbe principle and adopts a high-precision measurement system, thus having high measurement accuracy.

2、 Purpose:
Digital universal length gauge is a length measuring instrument used for absolute and relative measurements. This instrument is mainly used in the metal processing industry, especially in the metrology rooms of mechanical enterprises such as tool and measuring tool manufacturing and instrument manufacturing, as well as in various levels of industrial metrology departments.
Its main measurement objects include:
Smooth cylindrical parts (shafts, holes, plug gauges, ring gauges, etc.)
The pitch diameter of internal thread, external thread, thread plug gauge, and thread ring gauge.
Parts with parallel planes (calipers, measuring rods, lower grade measuring blocks)

3、 Specification parameters:
Measurement range (mm):
External dimensions: Absolute measurement 0-100; Relative measurement 0-670
Internal dimensions: When using a small measuring hook (maximum insertion depth of 12, maximum arm thickness of 50), the range is 10-400
When using a large measuring hook (with a maximum insertion depth of 50 and a maximum arm thickness of 85), the range is 30-370
Electrical measuring hook: 1-60mm; Universal measuring hook: 14-112mm
Internal thread diameter measurement: When using a large measuring hook (thread diameter 13-30mm)
When using a large measuring hook (thread diameter 31- (70- arm thickness) × 2)
Pitch: 0.5-6mm
External thread diameter measurement: maximum 200mm, pitch 1-6 mm
Measurement force (N): 0, 1.5, 2.5
Digital display equivalent: 0.1 μ m
Instrument indication variability: When measuring external dimensions, 2 σ ≤ 0.3 μ m
When measuring internal dimensions, 2 σ ≤ 0.5 μ m
Instrument accuracy: When measuring absolute external dimensions, the instrument accuracy is better than (0.5+L/200) μ m
When measuring internal dimensions, the accuracy of the instrument is better than (1+L/200) μ m
Universal Workbench:
Installation area: 160 × 160mm2
Height adjustment range (mm): 0-100
Lateral travel: 25mm
Tilt around the Y-axis: ± 3 °
Workbench rotation: ± 4 °
Allowable load: 10kg
Measuring the inner diameter of the cap and fitting size: φ 6H7
The outer diameter size of the measuring cap rod matched with the inner diameter of the measuring cap: φ 6g6
Instrument dimensions (mm): length x width x height=960 x 390 x 450
Instrument weight: 150kg