Vernier Calipers.

What are Vernier Calipers?

Vernier calipers are precision measuring instruments designed to provide highly accurate measurements of the length, depth and internal and external dimensions of an object. Comprising a main scale and a sliding vernier secondary scale, these analog calipers allow for readings with fine resolution, often down to 0.02mm or 0.001 inches. Equipped with internal jaws, external jaws and a depth rod, vernier scale calipers are versatile tools essential in fields that demand meticulous measurements.

How Vernier Calipers Work

Vernier calipers operate by aligning the zero on the vernier scale with the zero on the main scale. As the sliding jaw moves, the vernier scale provides incremental readings between the main scale markings, allowing for a precise vernier caliper reading.

Common applications of vernier calipers include measuring the diameter of pipes in plumbing, the thickness of materials in manufacturing and the depth of tapped holes in mechanical engineering. For example, a machinist might use a 300mm vernier caliper to ensure a metal threaded rod meets the exact specifications for a piece of industrial equipment.

Materials Vernier Calipers Are Made From

Accu's range of vernier calipers is crafted from high-quality stainless steel or hardened stainless steel. The use of stainless steel offers durability and resistance to corrosion, making the calipers suitable for various workshop settings and working environments, including those exposed to moisture or chemicals. Hardened stainless steel provides additional strength and wear resistance to the jaws, ensuring the tool maintains its accuracy to zero over prolonged use.

Size and Type Vernier Calipers Available

We offer vernier calipers in a range of popular sizes to accommodate different measurement needs. The smallest range size starts at 150mm (6 inches), ideal for precision tasks in electronics or small mechanical components. For larger applications, such as in manufacturing or heavy machinery, our 300mm (12 inches) vernier calipers provide the extended reach required.

Most of our calipers feature both metric and imperial scales, catering to diverse preferences and standards. Brands like Fowler and Insize ensure quality and reliability in every measurement. Additionally, the analog caliper design eliminates the need for batteries, offering consistent performance without electronic interference.

For specialised tasks, you might also consider our dial calipers or digital calipers, which offer different readout methods while maintaining the same high levels of precision.

FAQs

Q: What are vernier calipers used for?

A: Vernier scale calipers are precision measuring tools used to obtain highly accurate measurements of internal and external dimensions, as well as depths. Common uses of vernier calipers include tasks in engineering, machining, metalworking, and scientific research where precise measurements are crucial. For example, a 300mm vernier caliper might be used to measure the diameter of a large pipe or the thickness of a metal sheet.

Q: How do you read a vernier scale caliper?

A: Reading the vernier scale has a slight learning curve which is why Accu has prepared a deep dive guide on how to read it. Take a look at our "How To Read Vernier Calipers" article and be sure we've covered every angle so by the end of it you'll be an expert.

Q: Do vernier analogue calipers need batteries?

A: No, vernier calipers are analog calipers that do not require batteries. They operate mechanically using a sliding vernier scale to provide precise measurements. This makes them reliable tools in environments where electronic devices might fail or where battery replacement is impractical.

Q: Are Vernier Calipers Still Used?

A: Yes, vernier calipers are still widely used today. Despite the availability of digital calipers, many professionals prefer vernier scale calipers for their durability, reliability and ease of maintenance. They are especially valued in educational settings and industries where analog tools are preferred over electronic ones.

Q: How is a vernier caliper better than a ruler?

A: Vernier calipers outperform rulers in precision, measuring down to 0.02mm, and in versatility, capable of measuring internal and external diameters along with depths in one simple-to-use tool. This makes them indispensable for accurate and detailed measurements.

Bespoke Vernier Calipers Manufacture.

High precision, bespoke manufacture of Vernier Calipers to customer specification. State of the art facilities specialising in both small batch prototyping and large scale manufacture.