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Universal Length Measuring Machine
JD25-C / JD25-D Digital Universal Length Measurer
**Application**
The digital universal length measurer is a precision measuring instrument used for both absolute and comparative measurements. It is widely applied in the metal-processing industry, especially in measurement rooms, inspection stations, and other industrial fields such as tool-making and instrument manufacturing. This device ensures accurate and reliable results for a wide range of dimensional checks.
**Features**
1. High-quality cast-iron base provides excellent stability after long-term natural seasoning.
2. Optimized design ensures high performance and precision.
3. Offers a variety of accessories, making it highly versatile.
4. Equipped with an optical grating measuring system that displays results digitally for clear visibility.
5. Uses an infrared illuminator for low power consumption, compact size, and long life.
6. Incorporates Abbe's principle and a high-precision measuring system to deliver exceptional accuracy.
**Main Measurable Workpieces**
- Smooth cylindrical workpieces (such as shafts, holes, plug gauges, and ring gauges)
- Mid-diameter of internal and external threads, thread plug gauges, and thread ring gauges
- Workpieces with parallel planes (such as calipers, length bars, and low-grade measuring blocks)
**Technical Specifications**
- **Measuring Range (mm):**
- External Size: Absolute: 0–100 mm; Relative: 0–670 mm
- Internal Size:
- With small measuring hook: 10–400 mm (max depth 12 mm, max wall thickness 50 mm)
- With large measuring hook: 30–370 mm (max depth 50 mm, max wall thickness 85 mm)
- With electronic measuring hook: 1–60 mm
- With universal measuring hook: 14–112 mm
- **Internal Thread Mid-Diameter:**
- Small measuring hook: 13–30 mm
- Large measuring hook: 31–(70–wall thickness) × 2 mm
- Pitch: 0.5–6 mm
- **External Thread Mid-Diameter:** Maximum 200 mm, pitch: 1–6 mm
- **Measuring Force:** 0 N, 1.5 N, 2.5 N
- **Digital Resolution:** 0.1 μm
- **Accuracy Repeatability:**
- External Size: ≤0.3 μm
- Internal Size: ≤0.5 μm
- **Instrument Accuracy:**
- For external size: (0.5 + L/200) μm for JD25-D, 0.5 μm for JD25-C
- For internal size: (1 + L/100) μm for JD25-D, 1 μm for JD25-C
**Universal Worktable Specifications**
- Installation Area: 160 × 160 mm
- Height Adjustment Range: 0–100 mm
- X-Axis Travel: 25 mm
- Y-Axis Inclination: ±3°
- Worktable Rotation: ±4°
- Load Capacity: 10 kg
- Contact Tip Internal Diameter Fit: φ6H7
- Contact Tip Pole Outer Diameter Fit: φ6g6
**Overall Dimensions:** 960 × 390 × 450 mm
**Weight:** 150 kg
This digital universal length measurer is ideal for precise and efficient measurement in various industrial applications. Its robust construction, advanced measuring system, and flexible accessory options make it a reliable choice for quality control and precision engineering. Whether you're working on internal or external dimensions, threads, or parallel surfaces, this device delivers consistent and accurate results every time.