Dial Calipers

Dial Calipers

Dial calipers provide direct, analogue readout of internal, external, depth, and step measurements in a single instrument. The dial face displays the measurement as a pointer sweep — a format that many machinists prefer for comparing parts against a nominal dimension, as deviations from the target are immediately visible as the pointer position relative to the set mark. AIMS Industrial supplies dial calipers in metric and imperial from precision measurement brands including Mitutoyo and Dasqua.

How Dial Calipers Work

A rack and pinion mechanism converts the linear movement of the sliding jaw into rotary movement of the dial pointer. The dial face typically reads one full revolution of the pointer as 1mm (metric) or 0.1" (imperial) of jaw movement, with the total range of the caliper displayed on a separate linear scale on the beam. Reading the caliper requires combining the beam scale reading (whole millimetres or tenths of an inch) with the dial reading (hundredths of a millimetre or thousandths of an inch). The dial mechanism has no battery, making it reliable in all conditions — there is nothing to go flat or display an error when you are under the pressure of a production measurement.

Dial vs Digital Calipers

Both formats are widely used in Australian workshops. Digital calipers offer one-touch zeroing and absolute readout, making them faster for general workshop measurement. Dial calipers have no electronics to fail and provide a continuous, readable display under vibration — conditions where digital calipers can give false or unstable readings. Many inspection environments specify analogue measurement instruments for their reliability and the absence of battery-related failure modes.

Maintenance and Care

Keep the rack and jaw faces clean and lightly oiled. The dial mechanism is sensitive to shock — dropping a dial caliper on a hard surface can damage the rack or dial needle. Store in the supplied case and avoid leaving calipers in areas where they will be knocked off benches or buried under other tooling.

Range and Resolution Selection

Standard dial calipers are available in 150mm and 200mm measuring ranges — 150mm covers the majority of workshop measurement tasks. A 0.02mm resolution dial is adequate for general machining; high-resolution 0.01mm dials suit inspection and precision fitting work. If the work requires measurement finer than 0.01mm, a micrometer is the appropriate instrument rather than a caliper of any type — calipers have inherent limitations in rigidity and jaw-closing force consistency that limit their practical resolution regardless of the dial graduation.

Order Dial Calipers from AIMS

AIMS stocks dial calipers from Mitutoyo and Dasqua in standard metric and imperial ranges. For help selecting the right range and resolution for your measurement application, contact our team.