Antique Pocket Watches » Tools and Materials » Truing calipers, balance screw cutters, overcoiling tweezers

Truing calipers, balance screw cutters, overcoiling tweezers

Two types of calipersTRUING CALIPERS
A tool in which to place a balance wheel to check for truth in round and flat and make the necessary adjustments. Two types of calipers are illustrated; one with a screw adjustment to open and close, and the other which works with hand pressure. Each tool has a moveable indicator and a wrench to make adjustments of the arms of the balance.

This tool is used in checking the poise of a balance wheel. The one shown has three legs. Two of these are adjustable so as to level on your working surface. The jaws are of highly polished sapphire or ruby jewels. With general use and care, these jaws will never need refinishing. The adjustable jaws make it possible to use this tool for any size of balance. Poising tools also come equipped with highly polished steel jaws and this type is equally serviceable if the jaws are kept highly polished.

This tool is used to hold and remove a balance screw after it has been loosened with a screw driver. Undercutting to remove weight can be done after removing the screw from the holder while timing washers may be added without removing the screw from the holder.

These come usually in assortments of twelve and are available in sizes to correspond with the smallest pivots. They are used to broach or clean pivot holes in train bushings or plates.

Used to remove weight from a balance screw by cutting from the under side of the screw head. A set ordinarily has the variety of sizes necessary to undercut the different size balance screws.

balance screw cutterBALANCE SCREW CUTTERS
This is a Swiss type balance screw cutter used to remove weight from the balance wheel. It cuts a cone in the head of the screw without taking the screw from the wheel. The prefer-red method is to undercut with the lathe or the undercutting tool; however, many Swiss manufacturers use this type of cone cutter.

These are fine-pointed tweezers used only on hairsprings. Due to the delicate points it is not recommended that you use these tweezers for any other work. The tips are graded from very fine to coarse. Each manufacturer has a different system for designating the fineness of the tips. Usually the largest number will designate the finest tip. The beginner should start with a medium-fine tip and then add others as the need arises.

A steel pin used in working on hairsprings. It is mainly used as a holding tool for the collet and hairspring. It is tapered to a size that will accomodate all sizes of collets. You may substitute a broach or other tapered steel rod.

This set of five tools is designed to make adjustments to the hairspring while in the watch. It has three sizes of hairspring leveler tools, one tool for centering and one tool to adjust the regulator pins. These tools are not necessary for the beginner.

This set of five tools is used in the manipulation of the hairspring. The illustration explains the use of each tool.

OVERCOILING TWEEZERSovercoiling tweezers, pallet warmer
These tweezers are used to form the overcoil of a hairspring over the body of the spring. The illustrations show the different sizes of curved tips. 10/0 or 10/1 are recommended for general use. This tool is not essential for the beginner as the overcoil may be formed by using a pair of hairspring tweezers and a taper pin.

This tool is used to hold and apply heat to a pallet fork. The pallet stones are cemented into the fork with shellac. This cement will melt when heat is applied. Therefore, this becomes an essential tool whenever a pallet stone has to be adjusted or replaced. Heat should never be applied directly to the pallet fork, as direct heat will draw the temper from the steel fork and arbor. The part of this tool which holds the pallet fork is split to allow each pallet to be heated separately.

The illustrated bottle with hole cut in cap is used to contain the part and alcohol BOILING CUP AND BOTTLE
When ever it is found necessary to remove shellac from any part of a watch, such as the pallet fork, roller, etc., the recommended method is to boil the part in alcohol. The illustrated bottle with hole cut in cap is used to contain the part and alcohol (half full will be sufficient). A small amount of water is placed in the boiling pan, the bottle placed in the pan and heat applied until the alcohol boils sufficiently to dissolve the shellac. A low flame, such as an alcohol lamp, should be used to minimize the chance of igniting the alcohol fumes. Alcohol is highly inflammable.

The bench vise has always been part of the watchmaker’s equipment. It is used in the making or refinishing of tools and other small watch parts. The beginner will find it necessary to make certain tools which cannot be purchased, and so a bench vise should be a part of his equipment.

Cannon pinion, roller jewel setter, shellac
CANNON PINION TOOL Used to tighten a cannon pinion. There are other methods used to close or fit a cannon pinion but the cannon pinion tool is considered the most practical and safest method. ROLLER JEWEL SETTER Used to hold and conduct heat to the roller table in order to set or make

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