Shars 5 Fully Machined Threaded Back Plate 2-1/4-8 For 3 or 4 Jaw Self Center Chuck New. For back plate you would not need to drill any mounting holes but you will need to turn the shoulder D1 down. 040 to match the back of the lathe chuck to make the chuck & back plate more concentric with the lathe spindle and reach chuck's TIR. Mounting Thread Size T: 2-1/4'' - 8.
Shoulder Diameter D1: 3.78. Bolt Circle Diameter D2: 4.25. Hub Length C: 0.945'.
Hub Diameter D: 2.17'. Flange Thickness B: 0.63'. Shoulder boss h: 0.1'. How to process back plate to guarantee Chuck's T.
As long as back plate Shoulder Diameter 3.78"> chuck's D1, all 5" chuck will fit in. All back plates have 0.04 allowance, please measure the size of Chuck's D1 before process your back plates. The size of back plates's D1 should be a little bit smaller than the size of Chuck's D1. Because the gap between back plate and chuck is smaller, chuck's TIR is better. No gap is the best.
D1 need to be processed before back plate can be mounted. You would not need to drill any mounting holes but you will need to turn the shoulder down. 040 to match the back of the lathe chuck to make the chuck & back plate more concentric with the lathe spindle. When turning the shoulder of the backing plate, ONLY TURN THE SHOULDER OF THE BACKING PLATE WHEN ATTACHED TO THE LATHE SPINDLE. If you use a chuck to clamp the backing plate and then turn it, the backing plate will not be true to the lathe spindle and will have more runout than specified when the chuck and back plate are put together.
We have matching LATHE CHUCKS available. 5 3 jaw Self Centering Scroll Lathe Chucks Solid Jaws. 5 3 jaw Self Centering Scroll Lathe Chucks 2 Pc Reversible Jaws.
We have more LATHE CHUCKS available. The item "3/4 2 Bit Tongue and Groove, Router Bit Set -1/2 Shank Milling Woodworking Q" is in sale since Wednesday, April 3, 2013. This item is in the category "Business & Industrial\CNC, Metalworking & Manufacturing\Workholding & Toolholding\Workholding\Chucks".The seller is "discount_machine" and is located in Saint Charles, Illinois. This item can be shipped worldwide.