Wheelwright

These tradesmen made wheels for carts (cartwheels), wagons (wains), traps and coaches and the belt drives of steam powered machinery.

Some earlier construction for wheels such as those used in early chariots were bound by rawhide that would be applied wet and would shrink whilst drying, compressing and binding the woodwork together.

Straking was considered to be a less skilled practice and could be done with less knowledge and equipment, this made the wheels easier to service without the need for a blacksmith.

These small changes in design made a massive improvement to the strength of the wheel whilst reducing its weight; vehicles then became more efficient to build and use.

However, spoked wheels required precise spacing and careful calculations to construct a perfect circle.

[3]: 85–86 Due to the skill and experience required for making wheels, in Europe the wheelwright was formed into an identifiable trade.

[3]: 149 The basic parts of a wooden wheel are nave (or hub), spokes, felloes (felly) and tyre (tire).

As it cooled and shrank it tightened the joints of the spokes-to-felloes and spokes-to-nave, strengthening the wheel and making it more rigid.

[7] In modern times, wheelwrights continue to make and repair a wide variety of wheels, including those made from wood and banded by iron tyres.

Sometimes Hickory is substituted for Oak and Ash as it is easier to bend for mass production and is quite springy for light wheels that require a bit of flexibility.

The Oak is used because it doesn't bend, compress or flex and transfers any load pressures directly from the felloes to the nave.

The skills were kept alive by small businesses, museums, societies and trusts such as The Colonial Williamsburg Foundation (USA) and The Countryside Agency (UK).

The Worshipful Company of Wheelwrights in London (UK) maintains a flourishing (government-backed) apprenticeship scheme that began in 2013.

A wheelwright's shop
Traditional wheelwright
Worldwide Wheelwright Phill Gregson fitting iron "strakes" to a traditional wooden wheel
Parts of a wheel
This plate published in a volume of Encyclopédie in 1769 shows both methods of shoeing a wheel. In the centre the labourers are using hammers and "devil's claws" to fit a hoop onto the felloe, and on the right they're hammering strakes into place.