B Ball Bille en Caoutchouc Pour l'Ouverture et la Fermeture de Tous Types

We mould the 8008 friction ball from pliable synthetic rubber to break tight case backs free and run them down on their threads. The yielding surface conforms to milled edges, polygon corners, or smooth steel plates under palm pressure. It serves for preliminary turning before a rigid key is needed.

Pliable rubber body

The sphere yields under steady downward force. That spread increases the contact area across the case back, gripping shallow notches and satin-brushed steel without leaving metal track marks on the flats.

Palm pressure transfer

Your hand wraps the outer curve to apply direct torque. The rubber transmits rotational grip across the entire diameter of the case back instead of concentrating force into two or three isolated slots.

Thread run down

Once a tight back breaks loose, this ball spins the threads out quickly. It does the same in reverse, catching the starting thread and seating the gasket before final tightening with a dedicated wrench.

Bench surface care

Keep the outer skin free of oils, swarf, and pegwood shavings that can embed in soft rubber. A wipe with clean paper or a dip in warm water restores the natural tack of the compound.