On the strength of five decades of professional experience, Tandy Instruments can repair, service and calibrate most measuring devices including cable-driven speedometers and chronometers, antique clocks, mud pressure gauges and rheometers.
If replacement parts are no longer available – as is the case with many vintage pieces – we machine new parts to the necessary critical tolerances, ensuring your important or precious instrument performs as new.
Upon inspection of your device, we provide a free written estimate for repairs, parts and materials, for your approval prior to work commencing.
Should we later discover any potential areas of concern, we'll give you the option to repair or service up-front, before the operation or accuracy of your device is affected.
In order to guarantee all repairs, servicing usually involves a complete strip-down. All parts are cleaned and polished, lubricated, repaired or machined if necessary. After reassembly, the instrument is precision calibrated to the standards for that device.
Tandy Instruments has been serving customers in Perth, throughout Australia and internationally since 1987.
"Many thanks for your good service and tips, checked out the cable and all OK. Reinstalled the speedo and did a 5 Km road test – Result – Perfect in every way, many thanks for your expertise and service. I will recommend you to my group of enthusiasts, both Classic Bikes and Cars."
John M, Perth
Triumph Trophy 650 / Smith's speedometer
Speedometers work in several ways, some by centrefrugle weights; others by magnets. Modern types are electronic. The number of engine revs determines the calibration of the speedometer and the revs are different from model to model. Cable driven speedos can seize when the main shaft and body run out of lubrication, which in turn can break the cable or damage the gear that drives the cable at the engine end. Contact us for speedo repair & calibration.
Chronometers, or chronometric speedos, work on a clock principle where very fine adjustments are required for perfect functionality. A typical repair involves stripping down and cleaning the movement followed by a calibration process involving weights.
Repairs to Elliott Brothers London (EBL) speedometers. These were fitted to – among others – Napier cars in the early 1900s. This type of speedometer has the odometer above the speedo. There is also the EBL Triple where the odo is at the bottom; the speedometer in the middle and a clock at the top.
Vintage and antique clocks stop working because of wear and tear and lack of lubrication. The gears that drive the clock are fitted on to spindles which are located into holes in the two plates that form the body of the movement.
These holes wear in a elongated shape and this eventually traps the spindle. And because it is out of line and lubrication, correct rotation of the gears becomes impossible. Contact us for antique clock repair service.
Mud gauges (also generically referred to as Cameron Gauges or Water Pump Gauges) have pressure applied to a diaphragm then to a pin and plate through to a spring which operates the movement. All of these components need critical assembly and calibration.
We repair, service and calibrate all common mud gauge makes including Cameron, Oteco, Geolograph Pioneer and DTH. Fast turnaround.
Rheometers have a 'bob' that sits in the sample being tested. The bob is surrounded by a rotor with a specific gap separating the two components. The rotor is turned by hand crank or by RPM-calibrated motor.
As the rotor turns it also tries to turn the bob which is connected to a dial indicator via a spring – which is of a known tension – and it is this turning effect that gives the viscosity reading.