Many pivot holes in Big and Baby Bens have a curved recess inside the front plate. I use KWM brand bushings for the small sizes such as #59, #5 and #6. I recommend "American System" bushings in KWM sizes (available from the major clock parts suppliers), for the larger bushings such as #13, #21 and #26. Use KWM sized bushings, DON'T use Bergeon bushings! Bergeon bushings require a large hole to be reamed, and it looks bad. Sometimes the oil in the balance screws turned rusty, and I think it was because there was too much endshake, causing the point on the staff to revolve in the less well finished part of the screw, abrading the point.
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Adjust the balance endshake so it is very small (just enough freedom so the balance is free when the movement is in the case).(Another cause of an erratic rate can be a slightly loose center friction.) Rust on hairspring – replace if necessary. Center the hairspring in regulator slot when balance is at rest.Don't leave balance pivots too sharp or they will cut into the end screws.5W-40 synthetic motor oil on balance pivots.Synta-Visco-Lube (thick synthetic watch oil) on T5 pivots, escape wheel teeth (a dot onģ teeth), impulse pin (small dot on each side).Pivots (pivots in plates and linkages), alarm escape wheel teeth, repeat lever pivots and where tension springīears on repeat lever, center of alarm trip wheel, washer on trip staff inside back plate (makes it so it won'tįall out in handling if trip staff is removed), clicks (under rivet head, underneath, and where click spring bears 5W-40 Synthetic Motor Oil: T4 pivots, alarm verge.10W-60 synthetic motor oil on T1, T2, T3, A1, alarm escape wheel pivots.Grease ratchet wheels, trip cam, and where trip spring pushes repeat lever.10W-60 synthetic motor oil on mainsprings.Oiling Locations for Big Ben Style 1, 1a, 2 and Loud Alarm Movement:
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F and B refer to front or back, and T and A refer I number wheels starting at the main wheel. Ammoniated cleaners tend to eat away the hairspring material, changing For the names of some excellent clock repair books, see the recommended reading page.ĭon't use ammonia based cleaner on hairsprings. This page gives some hints about Big Ben and Baby Ben alarm clock repair. 6 paragraph 1 sentence 1 letter f Westclox Other Repair Repair Tips Westclox Big Ben and Baby Ben Repair Tips The legal basis for the use of this service is Art. You can object to the collection of your data by Facebook pixel, or to the use of your data for the purpose of displaying Facebook ads by contacting the following address: A cookie may also be stored on your computer for these purposes.
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