Cutters and Custom Verges
Single tooth gear cutters
Single tooth gear cutters are designed to have much
greater efficiency than fly cutters in both set up
and cutting while being an economic alternative to
the costly multi tooth cutters. This allows shops to
carry a large selection or a complete set of
cutters, and they are admirably suited for shops
doing a low volume of wheel cutting on a wide variety of
clock movements. All single tooth cutters have a
1/4 inch hole diameter and are made of oil hardened tool
steel. They can be sharpened back nearly a third of
their diameter. They will outlast most of their users!
These cutters follow the traditional profiles of European and American clock wheels. They have a square bottom with a longer tooth than modern wheels. Price: $31.50 .4mm - 1.0mm set of 13 cutters $410.00.
Short form cutters are used primarily in high load
applications. One most often sees them used on
barrels and on production grade American movements
due to their thin wheel blanks. For many it is the
place to start with gear cutters as short form
wheels can be used to replace the deeper tooth forms
where the deeper forms cannot be used where short
form applications are necessary.
Escape wheel cutters
More often than not the escape wheels on antique clocks are damaged as a result of the teeth being too thin and bending or from being too thick and not providing the necessary relief for the accidental over-swing of the pendulum. The escape wheel cutters that we sell are designed to give an optimum compromise between these two extremes. Our recoil and dead-beat cutters cover a wide range of applications from tall clocks to French rounds.
One should note that even though a new escape wheel cutter will not fit all escape wheels perfectly they will still work efficiently and will often help correct the problems mentioned above. Keeping in mind that an escape wheel only sees action on the front tip of the tooth the rest of the profile is important only for clearance, strength and cosmetic appearance.
In order to figure out
what cutter you need please consult the chart pertaining
to escape wheel cutters in the technical information
section of this website.
Form relieved multi-toothed cutters by P.P.Thornton
P.P.Thornton sets the standard for clock wheel
cutters. These cutters are made of M42 (HSS+TE) High
Speed Steel with 8% Cobalt. This superior steel
alloy, hardened to 68 Rockwell C, is known
for holding an edge. Under proper conditions
up to 500 gears can be cut between sharpening. These
cutters are available in long form, short form,
round bottom for modern German wheels, and worm
drive wheels. (See Technical Chart for details)
Clocks with poorly tuned escapements are, quite frankly, poor runners, and when they do run they more often than not contribute to premature escape wheel wear. This aspect of clock repair is often neglected as escapement work is both technically and physically difficult and few master it. We have developed a technique of making both dead beat and recoil escapements that incorporates traditional formulae with modern technology. The result is a finely tuned escapement with highly polished working surfaces and the hardness of tool steel throughout the entire verge. These new verges are drawn in CAD and cut using EDM technology giving accuracy far beyond what hand cutting and filing can accomplish. This results in proper and healthy amplitude and optimum power from the impulse face. A well made verge also reduces the amount of drop on the escape wheel to a minimum which results less wear on the escape wheel teeth and less pitting on the verge. These verges will also be made to match the original in all details so as to preserve the value of your antique clock. Custom Verges priced by request.
We also stock verges for some popular mass produced clocks such as the Seth Thomas #2 , 5 tube and 9 tube Herschede clocks. Stock Verges: $45.00