Tid-Bit 17 - 6-Jaw "Bezel" Chucks
Published in the December, 2012 NAWCC Bulletin, starting on page 637.
Over the years I have fielded quite a few questions about holding gears so that one can work pivots. This is why I wrote the previous Technical Tid-Bit in this series – “Gear Holding Techniques”. But, as I discuss gear holding techniques with students and other clock repair folk the focus usually ends up on holding gears that don’t have much arbor sticking out past the gear hub. An example of such a gear is shown in Figure 1.
Read MoreOver the years I have fielded quite a few questions about holding gears so that one can work pivots. This is why I wrote the previous Technical Tid-Bit in this series – “Gear Holding Techniques”. But, as I discuss gear holding techniques with students and other clock repair folk the focus usually ends up on holding gears that don’t have much arbor sticking out past the gear hub. An example of such a gear is shown in Figure 1.
Figure 4 – The Backs of Three Styles of 6-Jaw Chucks – Numbers reflect chucks in Figure 3
The first two chucks in Figure 4 were made by the American Watch Tool Company, in Waltham Mass. They are labeled “SNYDER’S PATS. JUNE 28 . DEC . 13 – 1881” (see Figure 5). While extremely collectible, these chucks typically have too shallow of jaw steps to be used for holding clock gears.
