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Horological Tools |
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Index Head
(A) This index head was designed and built by a couple of clockmakers who were frustrated with the cumbersome and time consuming set-ups involved with common machine tools. With this device most gears can be cut in fewer than 30 minutes including set up time. The head is designed to fit directly on the bed of micro mills such as the Sherline or be placed in the dialed vise of larger mills such as a Bridgeport. Set up on the Sherline is approximately 5 minutes and is less than a minute on a Bridgeport. The headstock is 8mm making it compatible with the watchmakers lathe. The index head comes with 7 plates: 40, 56, 60, 64, 72, 84 and 96, one single tooth cutter, cutter arbor, 8mm 1/4 wheel arbor, two 1 3/4 inch backing plates and two 2 inch wheel blanks.(B) While these plates cover the majority of jobs, index plates are available in any size. 8mm wheel arbors (C) are available in 1/4, 7/32, 3/16, 5/32 and 1/8 inch. (D) Backers are available in 1 3/4 and 1 1/2 inch and come with a 3/16 inch hole. Cutter mandrels are also available separately and come
with mounting screws for 7mm and 1/4 inch inside diameter
cutters. |
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Wheel
Blanks
These wheel blanks are made of full hard leaded brass
(Composition 353 H#4). Full hard brass both has more
strength and machines better than half hard brass.
It was the brass traditionally used in Clock making until
industry as a whole cast it aside. The following sizes
are available in both spoked and plain; 1 3/8 x 1/16
inch, 1 3/4 x 1/16 inch, 1 7/8 x 1/16 inch, 2 x 1/16
inch and 3 1/4 x 1/8 inch. Spoked wheel blanks come
with a predrilled 7/32 inch hole. Brass pieces are
available upon request. Price: See Table Below.
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Wheel and Pinion Cutting in Horology by J. Malcolm Wild.
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This book is nearly
definitive on wheel cutting. It covers the tools, both
historical and modern, set-ups, materials,
calculations and much more on both wheel and pinion
cutting. It demonstrates many special operations such as
Geneva stops and crown wheels while putting it in plain,
understandable language. It also has an appendix
with many useful charts and tables. The book is profusely
illustrated and has 253 pages, hardbound.