Dial-Indicator Type Vernier Caliper
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Dial-Indicator Type Vernier Caliper
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Description
Product Introduction:
The dial‑type vernier caliper is a measuring instrument that combines mechanical precision with intuitive readouts. It converts linear displacement of the main scale into circular oscillation via a dial indicator, eliminating the need for secondary conversion and significantly boosting measurement efficiency, making it an ideal choice for rapid on‑site inspections in workshop environments.
The product features a high-precision gear‑rack transmission mechanism, ensuring responsive pointer movement and a clear, easy‑to‑read scale that accurately captures even the smallest dimensional changes, thereby minimizing visual reading errors. The ruler body is crafted from premium stainless steel, undergoes high-frequency quenching and precision grinding for enhanced rigidity, wear resistance, and corrosion protection. Its measuring jaws fit tightly together, and when paired with a dial‑locking device, they securely lock in measured values, facilitating re‑inspection and record‑keeping.
Product Applications:
It features four‑in‑one measurement capabilities—outer diameter, inner diameter, step, and depth—making it suitable for a wide range of inspection applications. Its robust all‑metal construction offers superior impact resistance compared to digital calipers, and it operates reliably without an external power source. It is well‑suited for production environments such as machining, mold making, hardware and automotive parts manufacturing, and tooling maintenance, where fast response times and strong anti‑interference performance are critical.
Product Features:
1. It offers four measurement functions—inner diameter, outer diameter, depth, and step—and supports both direct and comparative measurements.
2. Made of stainless steel, with a matte chrome-plated graduated surface; laser-etched graduations and lines are clear and wear-resistant.
3. Dial calipers with a measuring range of 200 mm or more are equipped with a fine-adjustment roller, enabling precise micro‑adjustments and facilitating one-handed operation.
4. The indicator dial features shock resistance and an outer-ring locking mechanism.
Technical Specifications:
| Parameter | Specification Description |
| Range | Available in 150, 200, and 300 mm. |
| Graduation value | 0.01/0.02mm |
| Precision | ±0.03 mm (for 0–150 mm) |
| Main material | Stainless steel |
| Scale craftsmanship | Laser scale |
| Applicable temperature | 0–40℃ |
Instructions for Use
Whether the dial caliper is used correctly directly affects its accuracy; the following requirements should be observed during use:
1. Before use, wipe the dial caliper clean, then slide the frame along the scale; the movement should be smooth and free, with no sticking, loosening, or binding. When the frame is secured with the locking screw, the reading should remain unchanged.
2. Check the zero position. Gently slide the vernier scale until the measuring faces of the two jaws are brought into contact, and verify that there is no noticeable light leakage. Ensure that the dial pointer points to “0,” and confirm that the main scale and the vernier scale are aligned at the zero mark.
3. During measurement, gently push and pull the slide to bring the measuring jaws into light contact with the surface of the part being measured, then lightly rock the dial caliper to ensure good contact. When using a dial caliper, since it lacks a built-in force‑control mechanism, the operator must rely on tactile feedback; avoid applying excessive force to prevent compromising measurement accuracy.
4. When measuring external dimensions, first open the movable jaws of the dial caliper so that the workpiece can be freely inserted between the two jaws. Then, bring the fixed jaw into contact with the work surface and manually move the slide until the movable jaw is tightly pressed against the workpiece surface. Note: (1) During measurement, the end faces of the workpiece must not be tilted relative to the jaws. (2) Do not attempt to force the jaws onto the part by using a jaw spacing smaller than the workpiece dimension.
5. When measuring internal diameters, first spread the two jaws apart to a distance slightly smaller than the dimension being measured, then insert the caliper into the hole. Next, adjust the moving frame so that the inner jaws make tight contact with the inner surface of the workpiece; at this point, you can take the reading. Note: The measuring jaws of the vernier caliper must be positioned at the diameter of the holes at both ends of the workpiece, and they must not be tilted.
6. The measuring faces of the jaws on a dial caliper come in various shapes. When taking measurements, select the appropriate type based on the geometry of the part being measured. For example, use the external jaws to measure length and external dimensions; use the internal jaws to measure internal diameters; and use the depth gauge to measure depth.
7. When taking a reading, hold the dial caliper horizontally, ensuring your line of sight is perpendicular to the scale face. Then, carefully identify the indicated position according to the reading procedure to obtain an accurate measurement, thereby avoiding reading errors caused by an oblique viewing angle.
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