Shars 6 3 Jaw Reversible Jaws Self Centering Lathe Chuck + M39x4 Back Plate +. 003 TIR Runout Certificate 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. Each high quality chuck comes with a certification that documents TIR. Center hole: 1.772. Bolt Circle Diameter: 5.591. Input Torque: 160 Nm. Clamping Range A-A1: 0.118-2.165. Jamming Range B-B1: 1.968-6.299. Clamping Range C-C1: 2.165-5.709. Accuracy is maintained for the entire clamping range. Semi-steel chuck body made from high quality cast iron. Three pinion design with each pinion ground and hardened to HRC 43. Two piece jaw design with a master jaw and a top reversible jaw in. American Standard tongue and groove. Both side of jaw teeth and guides are ground and hardened to HRC 58-62. Each set of jaws are serialized in their own set. A serialized set of jaws are then finished, ground, and lapped on their designated chuck body which will be the same chuck body on the final assembly to achieve a greater accuracy. Before assembling the jaw to its designated chuck body, the jaw’s finish machining are performed on a closed tolerance state of the art CNC machine from Japan. Scroll plate’s thread flank are ground on both side to achieve a tighter contact with the master jaw. Each chuck has gone through rigorous accuracy and repeatability inspection with clamping and jamming multiple random testing rods or rings. D2 Mounting Hole Bolt Circle Dia (inch). 1 set of reversible jaws for inside and outside. 3 piece of mounting screws for the lathe chuck back plate. 6.3 Back Plate Product Description. Mounting Thread Size T: M39x 4 TPI. Shoulder Diameter D1: 5.16. Bolt Circle Diameter D2: 5.591. Hub Length C: 0.945′. Hub Diamete D: 3.58′. Flange Thickness B: 0.63′. Shoulder boss h: 0.16′. Of Bolt Holes: 3. How to process back plate to guarantee Chuck’s T. I. R? You would not need to drill any mounting holes but you will need to turn the shoulder down. 050 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. If you need to speak to a sales person feel free to call. We are open Monday through friday 8:30 to 5:00 est. This item is in the category “Business & Industrial\CNC, Metalworking & Manufacturing\Workholding & Toolholding\Workholding\Chucks\Lathe Chucks”. The seller is “discount_machine” and is located in this country: US. This item can be shipped to United States, Canada, Mexico.
- Modified Item: No
- MPN: 202-5433+202-6215
- Custom Bundle: No
- Brand: Shars Tool
- Non-Domestic Product: No