Professional Heavy Duty Vernier Caliper with Dial Indicator for Precision

Thoroughly clean the inner and outer measuring jaws, then close the jaws smoothly until they fit perfectly; loosen the small zero-adjustment screw on the side of the dial; rotate the yellow dial to align the pointer precisely with the 0 mark; tighten the zero-adjustment screw and recheck the zero point by opening and closing the jaws. Do not forcibly bend the pointer.

The entirely mechanical design requires no batteries and is resistant to coolant, dust, and electromagnetic interference; The dial enables direct reading, allowing novices to read measurements more quickly; Equipped with a shockproof gear mechanism, it is durable and vibration-resistant in machining environments; Stainless steel measuring body with laser-etched markings is wear- and corrosion-resistant, supporting four-in-one measurement of outer diameter, inner diameter, depth, and steps.

The problem is usually caused by metal debris on the rack or internal gear lack of lubricant. Clean the rack with a soft brush first. If the fault remains, send it to professional measuring tool maintenance personnel for cleaning and oiling instead of disassembling the dial by yourself.

Do not drop, strike, or measure rotating workpieces to avoid gear damage; after use, clean off cutting fluid and metal debris from the rack gaps with a lint-free cloth; apply a small amount of anti-rust oil, and when storing, do not fully close the measuring jaws, leaving a gap to prevent rust; keep away from high temperatures, humidity, and strong magnetic fields, and do not disassemble the dial structure yourself.

Standard steel measuring jaws: cost-effective, suitable for routine inspection of soft workpieces such as aluminum, plastic, and copper; hard alloy measuring jaws: both inner and outer jaws are inlaid with tungsten steel, wear-resistant and scratch-resistant, suitable for frequent measurement of high-hardness workpieces like steel and cast iron, resistant to wear that could cause errors; both types come with a thin depth gauge, capable of measuring hole depths and step heights.