SPC, LLC, Need the Ultimate in Sherline Precision? You can now have the super precision and flexibility with our new ER16, ER20, ER25, ER32 and ER40 Sherline lathe and mill conversion kits!  We use them in our everyday manufacturing process for our sister companies for precision better than .0005” TIR.  In fact, we turn parts with our ER systems with .00005”+/- everyday...even though the Sherline headstock’s say they aren’t even rated for that kind of precision.  Worried about not being able to use a jaw chuck if you install your new ER conversion?  We have you covered there too.  You can use our chuck back plates to choose from a wide variety of chucks and ultra precision chucks otherwise unavailable for Sherline lathes. Here are some benefits.... - Ridged Work Holding Hold your work piece much more securely than even possible before with the tiny Sherline collets or chucks.  The more surface area that you have clamped, the better...and larger collets are it! - Larger Work Piece Size for Lathes and Tool Size for Mills Here is a breakdown of what your new collet system can hold size wise: ER16 1/32” to 3/8”  through hole is .39” ER20 1/16” to 1/2”  through hole is .39” All collets will hold metric sizes within the ER25 1/16” to 5/8”  through hole is .39” listed ranges too! ER32 3/32” to 25/32” through hole is .50” ER40 1/8” to 1”  through hole is .50” You can now hold work pieces up to 1” in diameter in your lathe or your mill.  This truly allows you to get the most flexibility out of your Sherline like never before.  Imaging the different end mills and cutters you can choose from or even a 3D alignment indicator or edge finder systems with a 3/4” shank! Precision Drilling Use you new collet spindle with the Quick Change Tool Post and our precision collet drill setup and work with ultra precision alignment for your drilling needs.  You will be able to use our ER11 precision drill setup to precisely align the drill bit to your collet type spindle.  This will allow you the possibility to make very precise center and off center holes.