Orrery & ClockworksWinding the mainspring

Clockmakers and restorers Clerkenwell, London

Every second, accounted for.

We make and restore mechanical clocks, orreries and tourbillon watches in a workshop above a Clerkenwell yard. Scroll to wind one up and watch it run.

Scroll to wind the mainspring

01 How a movement runs

How a movement runs

One, the mainspring

The mainspring winds.

Every mechanical clock begins as stored effort. A ribbon of blued steel, four metres long, is coiled into a brass barrel with a key, one turn at a time. Two days of patience, held in a drum the size of a biscuit.

4.2 m of spring steel

Two, the going train

The gears mesh.

The barrel’s slow pull is handed down four wheels and pinions, each one multiplying the speed by about five. Count the teeth: forty-four, forty, thirty-six, thirty-two. Every tooth is cut, cleaned and checked by hand.

Ratio 1 : 566

Three, the escapement

The escapement ticks.

Here is the part that makes it a clock and not a clockwork toy. The anchor locks and releases one tooth at a time, kicked on by the balance as it swings. The hairspring breathes, and every beat is the same length.

28,800 beats an hour

Four, the orrery

The planets align.

The same idea, scaled up and pointed at the sky. Six planets on six brass arms, all driven from one crank under the table. Every so often they fall into a line. We built the machine to show you when.

Six arms, one crank

Power reserve0hours

I / IV

02 On the bench

How we restore a movement

One, stripped

Every part out.

The movement is photographed, numbered and taken completely apart. Wheels, pinions, jewels, springs, the lot. Nothing goes back in that has not been looked at under the loupe.

Up to 312 parts a movement

Two, cleaned

Brass, brightened.

Ultrasonic bath, then pegwood and a tray of fine rouge. Worn pivots are re-turned, bent teeth are re-cut and tired jewels are replaced. Our oils are changed to suit the clock, never the other way round.

Three days in the bath and bench

Three, regulated

Put back, proved.

Rebuilt in the order it left the maker’s hands, then run on the timing machine for a fortnight in six positions. It leaves with a twelve-month guarantee and a note of every change we made.

Within two seconds a day

I / III

03 Your turn

Choose a complication.
Watch it rebuild.

A complication is anything a watch does beyond telling the time. Pick one and the movement strips itself and rebuilds round it, live. Drag the scene to turn it.

Complication

28,800 vph

Jewels
23
Parts
312
Reserve
72 h

A tiny rotating cage carries the whole balance, so gravity pulls it every way in turn and the errors cancel out. Beautiful, and absurdly hard to make.

Drag to turn the movement. Beats are drawn at half speed.

04 What we do

Four ways to keep time with us.

I

Restoration

Strip, clean, repair and regulate. Longcases, carriage clocks, bracket clocks and wristwatches, with a fixed quote after inspection and a twelve-month guarantee.

from £480

Typical turnaround six to ten weeks

II

Commissions

A new movement, drawn and cut in our own workshop: tourbillons, perpetual calendars, moonphases or a table orrery made to your sky.

from £14,500

Twelve to eighteen months, staged payments

III

The Winding Club

We call every week to wind, set and oil your collection, at home or in the office. Members get priority repairs and a free yearly service of one piece.

£36 a month

Central London and the home counties

IV

Workshop tours

Ninety minutes at the benches, a go on the staking tool, and a cup of tea beside the orrery. Groups of up to eight, with a mainspring to take home.

£45 a head

Saturdays and Tuesday evenings

05 The small print

Slow work, done properly.

Ticks in a day
0
at 28,800 beats an hour, every one counted
Clocks restored
0
since the bench was first lit
Orreries built
0
each one tuned to its owner’s sky
Workshop founded
0
moved to Hatton Yard in 1931

06 Visit

Book a tour.

Ninety minutes at the benches. See a movement come apart, hear an escapement up close and wind an orrery yourself. Mind the stairs, they are steep and very old.

We reply within a day. This is a concept page: nothing here is bookable.

07 Find us

Up the stairs, past the plane tree.

Unit 4, Hatton Yard
Clerkenwell, London EC1
020 7946 0417
hello@orrery-clockworks.example

Five minutes from Farringdon station. The bell is the brass one with no label.

Monday
Closed, the clocks rest
Tuesday
9.30 to 17.30, tours at 18.00
Wednesday, Thursday
9.30 to 17.30
Friday
9.30 to 16.30
Saturday
10.00 to 16.00, tours at 11.00 and 14.00
Sunday
Closed