: In modern watches, the balance cock often houses a shock-absorbing setting (like Incabloc) for the jewel, protecting the delicate pivots from damage if the watch is dropped. Common Challenges for Amateurs
: Mounted on the balance cock, this lever allows an amateur or professional to adjust the active length of the hairspring, making the watch run faster or slower. amateur cock
: If a balance wheel stops moving when the cock is tightened, it may be due to insufficient vertical clearance (endshake). Some amateurs resolve this by "shimming"—placing a tiny piece of paper or metal foil between the cock and the mainplate to raise it slightly. : In modern watches, the balance cock often
: The most delicate step is ensuring the upper pivot of the balance staff perfectly enters the jewel hole in the cock. If the screw is tightened while the pivot is misaligned, the staff will break. Some amateurs resolve this by "shimming"—placing a tiny
Beyond the balance wheel, other parts may use "cocks" rather than full bridges: : Supports the escape wheel. Pallet Cock : Supports the pallet fork.