Why are the drills with shanks reduced to 1/2", in the 9/19" to 1" range, are called "Silver and Deming" Drills?
What does silver have to to with it and what is deming?
An inquiring mind would like to know. Thanks.
Google is your friend
This company began back in 1854, when Albert R. Silver and John Deming formed a company to make agricultural machines, although the "Silver & Deming" name does not date back that far. In the later history of the company, Emmor W. Silver was a principal; he was perhaps a son of Albert.
They began making woodworking machinery in 1866 when the offered Dole's spoke-tenoning and felly-boring machine, patented Oct. 31, 1865. Silver & Deming was created in 1867 or 1868 after L. A. Dole had died, and Dole, Silver & Deming was renamed. In about 1874, Silver & Deming incorporated and became Silver & Deming Manufacturing Co. About the same time that Silver & Deming Mfg. Co. started, they began offering a line of hand operated blacksmiths drills, which eventually expanded into a line of power driven drilling machines. In 1890, the company reportedly split, with one part becoming Silver Manufacturing Co.
Silver & Deming made a variety of machines that were primarily aimed at wheelwrights: hob-boxing machines, spoke-tenoning machines, etc.
Silver & Deming apparently invented the large-size twist drill bit with a turned-down shaft so they can be used in a chuck smaller than the bit's cutting diameter. They did not patent this idea, so the idea was quickly copied by others, but these bits are still called "Silver & Deming drills".
Or on this side of the pond, often known as blacksmiths drills, never heard them refered to over here as Silver and Demming yet, but you never know.
These started out back in the days before there were any Jacob type drill chucks, the drills could be held in a collet and were an alternative to the Morse taper drills (or other tapers that my have been around in those days). they are a very handy item for drilling on a mill/drill because you only need one or two collets to cover a whole range of drill sizes.
If you ever buy those Silver & Deming drills get ones with 3 flats ground on the shank so they cant spin in a drill chuck.
1/2"collets dont work worth a crap so use a drill chuck and hog away.