Instrument Repairs | Servicing | Calibration | First-Class Machining

On the strength of almost five decades of professional experience, Tandy Instruments can repair, service and calibrate most measuring devices including speedometers, rheometers and mud pressure gauges – as well as antique clocks.

If replacement parts are no longer readily available – as is the case with many older or 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 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 diligently calibrated to the relevant standards for that device.

Type 'D' Mud Gauge 3000psi
Re-built, reconditioned and recalibrated
ONLY $2000

speedometer repair 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.

pressure gauge calibration Mud pressure 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.

rheometer repair and service 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.

Vintage 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 traps eventually the spindle. And because it is out of line and lubrication, correct rotation of the gears becomes impossible.

Tandy Instruments

Proprietor: George Tandy
Rear 336 Cambridge Street
Wembley, Perth WA 6014
P 08 9387 6581
M 0409 680 076
E george@tandyinstruments.com.au

Speedometer Repairs

Vintage and Veteran
Chronometric
Elliot Bros (Triple)
Smiths
Jaeger
Veglia
Harley Davidson
BMW
Ducati
Mercedes
AC
VDO
Kienzle vibe recorders
XD Falcon
Bonoville speedo & tacho
and all cable-driven models

Rheometer Repairs

Ofite Model 800
Bariod Model 286
Fann Models 34A, HC 34A, 35A 35SA

Mud Pressure Gauge Repairs

Cameron - F & D Types
Oteco - F & D Types
Geolograph Pioneer
DTH Products
'O' Drill

Old Clock Repairs

Ansonia
Cuckoo
Grand Father
Grand Mother
Mantle
Schatz 8 bells ships clocks & barometers
Wall
Westminster Chimes

Barometers

All models repaired, serviced, calibrated

Old Ships Compasses

All models refilled, repaired, serviced