How They Made It Wooden Wheels With 300 Years Of History
In 18th century England, woodworker and clockmaker John Harrison built up a wonderful method for making wooden clock wheels. These wheels kept their concentricity during enormous changes in temperature and mugginess and had outstandingly solid teeth. Harrison’s utilization of the especially sleek lignum vitae wood killed the requirement for oil, bringing about a more extended enduring and more exact movement. These wooden wheels were only one piece of an unfathomable horological vocation. Harrison proceeded to concoct the marine chronometer , perhaps the main innovations ever, which took into account precise route adrift. Today in Michigan, clockmaker Rick Hale is carrying on Harrison’s inheritance with his fabulous wooden timekeepers.
Hale’s enormous scope work shuns conventional tall-case clock design, rather receiving a cutting edge style which features the inward activities of the movement. These monumental tickers are typically specially crafted to fit a particular space and can take from a couple of months to a couple of years to assemble. Sound’s wheels intently follow the method Harrison created more than 300 years prior and are on full showcase in his timekeepers. How are Rick Hale’s wheels made? How about we have a look.
Clockmaker Rick Hale
Stage One: Consider The Geometry
Center wheel with finished teeth.
“My method of wheel development takes into account outspread symmetry, meaning the wheel will “inhale” consistently every which way with changes in temperature and dampness. Every tooth is molded exclusively from painstakingly chose stock so that grain course is indistinguishable right around the wheel. This format makes for wheels that remain extremely steady, round, and precise after some time. I likewise utilize the stuff tooth geometry John Harrison created for his ocean tickers, and the outcome – thin teeth meshing with larger than usual rollers produced using lignum vitae – yields an extremely proficient stuff set with unimaginably low friction.”
Stage Two: Select The Lumber
Lumber that will ultimately be important for a clock.
“Timber determination is fundamental to accomplishing strength. All lumber utilized for my timekeepers is oven dried and permitted to ‘settle’ at different focuses in the wheelmaking interaction. Wheel spokes are for the most part chosen from quarter-sawn lumber and felloes (the perimeter pieces) are plain-sawn. This gives the most ideal strength and takes out shaky areas around the edges. Each tooth is separately cut and formed from tight-and straight-grained plain-sawn stock for uniform strength and rigidity.”
Stage Three: Rough Cut And Trim
Spokes and felloes.
“After lumber has been chosen, each wheel component is harsh cut with a saw and physically trimmed to definite dimensions. By then, all the pieces are prepared for joinery. I for the most part use tongue-and-furrow joinery for more modest wheels, and splines for bigger ones.”
Stage Four: Glue Up
Wheel clear in the wake of being glued.
“After the pieces have been stuck and cinched together, the wheel clear is trimmed to its last shapes, and then the exactness work begins.”
Stage Five: Bore And Turn
Boring and turning a huge wheel.
“The just wheels that make it to this stage are the ones that have dead-amazing joinery. These wheels are given a starter surfacing, and then their external diameters and bore diameters are physically turned on a 2000-kg German-made pantograph processing machine combined with an extremely huge Swiss-made rotational table. I reestablished these superb bits of apparatus myself, and they are devoted exclusively to wheelmaking.”
Stage Six: Cutting Grooves
Cutting grooves for each tooth.
“Once the external diameter and bore are turned, the depressions for the teeth are cut. This is the place where the 18″ Swiss rotational table truly sparkles, as it permits precise ordering to a goal of +/ – 1 bend second (that is 1/3600 of a degree). Working in wood, that degree of exactness may appear to be unreasonable to some. Be that as it may, when you’re making wheels with 240 teeth at a 34″ diameter, all of over the top excess helps.”
Stage Seven: Pressing Teeth
Pressing every tooth into its groove.
“Teeth are diminished to accommodate their sections (a light press-fit that is dictated by feel), and they are crushed into place each in turn utilizing a manual press I created. Conventional shroud stick is utilized here to fix the teeth safely. After the teeth have all been embedded, the stuff is given a last surfacing, and the essences of the teeth are ‘cleaned’ for uniformity.”
An get away from wheel, in progress.
Escape wheel with finished teeth.
“In the instance of a break wheel, the teeth are physically embedded in situ on the machine and are formed to definite shape utilizing the pantograph arm and rotational table. This cycle is time-devouring, yet works extremely well.”
Stage Eight: Sand, Lacquer, And Mount
Wheels after sanding.
Wheel after lacquering.
“After openings have been bored and counterbored at the center of the wheel to append it to its collet, it’s time for sanding, lacquering, and mounting.”
Wind & Water
Wind & Water, 2020.
Rick Hale’s most recent clock is called Wind & Water. Completed in December 2020, this 36″ x 60″ divider mounted clock has been a work in progress for quite a while and highlights a hand-cut frame produced using matured cherry, in addition to daisy wheel movement work, stitched maple hands, fight style driving weight, and stabilizer, and Hale’s unique interpretation of the single-rotate grasshopper escapement. In the convention of Harrison, Hale utilized lignum vitae all through the clock on all turning parts. The equipping of Wind & Water depends on Harrison’s “chordal pitch” method. Robust deals with commission just and is as of now building up a lunar stage table clock, which he calls L1.
For more, visit Clockwright.