Parts and jigs to make Exterior Clocks professionally.

Importing large, complete clocks from Europe was far too expensive, even at a time when the Rand was a Rand.  We (Clocktime) had sizes from 500 mm to 900 mm diameter.

The 700 mm was the most popular size of exterior clock  for schools, public buildings, golf courses…  Occasionally we installed the 900 mm type and the 500 mm diameter was a favorite mostly for indoors.

1.2 meter square dials behind glass


Sandbaai clock near Hermanus

Now, once you go larger than one meter in size, it’s best to do in-wall mounting. Easy enough, if the installation is for a new building. You still have to battle with the builders, they don’t always know the difference between cm and mm.
For this installation in 2007 I had asked for squares in the walls, large enough, so I could compensate for gaps with the wooden frames I fitted. They had to be perfect, as the aluminium clock frames, holding the dials came in the specified size precisely.
All the above models and this square 1.2 meters clocks have cover glasses.

At 73, busy in my studio and garden, I don’t undertake clock installations any more. That’s why I offer my jigs and parts for making  medium sized exterior / interior clocks.

On offer to enterprising clock-makers or hands-on \ practical people: The main item is the 700 mm diameter aluminium spinning die, used for making the popular medium sized exterior wall clocks.

The die weighs 25 kg, light in comparison to the previous tool, made from steel, a gantry was necessary to fit it onto a spinning lathe. The product is a seamless aluminium ring, into which the glass, spacers and dial etc. fit.

For on-wall mounting I supply a few simple parts. These have to be made for every clock.

Steel - jig for builders to prepare a wall with a perfect hole, where the 700 mm clock will fit.


Laser-cutting has replaced hand-work

                     The steel jig is for getting true round

720 mm  openings into walls. I have

done only 1/2 doz. in-wall installations

The first one was  a disaster until we

supplied the builder with the jig.


Once you decide  to make this size of exterior clocks, I can give you all the information, based on my years of experience, that is details of hands, movements, mounting, other materials, waterproofing etc…

The case – rings, made from 3 mm thick  aluminium

for the 900 mm large model are rolled and welded.

The seam is not visible from the outside.

I am offerig these lots:

  1. Three aluminium case rings, made from 3 mm thick material, 900 / 880 mm in diameter 

2.   One spinning die, to make 700 mm clock cases in 1.6 mm aluminium, ca. 20 perspex dials, some glasses, hands,

jigs and various fitting parts 

I will check on courier charges once you have decided to purchase either or both lots. 

  You can make an offer and I will not refuse a reasonable one.                             

 Heavy  – duty clock movements, driven by master clock.

No front glass needed for these movements.  Details and prices on request.

INDUCTA "secondary" movements needing a maste clock
Inducta clock movements,
The rotor turns 180 deg. every minute
A 300 movement, Rotor section
Impulse and separate drive motor
Part of  the control section, movement UFM 150

The A 300 model is used for exterior clocks of  up to 1.2 meters.

It receives impulses every minute from a master clock and clicks

the hands forward. The hand-shafts are for a 40 mm thick panel.

The UFM 150 is also controlled by a master clock. The impulse section

then activates the motor on the right side, which drives a number of gears,

moving the hands forward every minute in a 8-second sweeps. If driven by

an older type of master clock without power reserve, the internal electro –

mechanical unit keeps the time-synchronisation. The hand shaft- tube is

150 mm long.

Hand bushes, partly modified
Exterior clocks have special sealing rings on both shafts ( left ) The brass bush for a medium-sized movement is modified to carry an ornate hour hand. (Similar in principal to the heavy aluminium bushes.)

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