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Shars 3' Fully Machined Threaded Back Plate with 3/4 x 16 TPI for 3 or 4 Jaw Lathe Chucks 202-6212 P

4.9 (3) Write Review
Free shipping on orders over $29.99

$48.15

$ 23 .99 $23.99

In Stock

About this item

  • Back plate needs to be machined in order to fit the lathe chuck
  • Mounting Thread Size T: 3/4 x 16 TPI
  • Back Plate Diameter: 3.14"
  • Bolt Circle Diameter D2: 2.598"
  • Shoulder boss h: 0.12''; Shoulder Diameter D1: 2.25"


Product Description

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This back plate would need to be machined in order to fit our 3" 3 jaw or 4 jaw self centering and independent lathe chuck (p/n 202-5408, 202-5417, 202-5418).

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

  • The back plate may come with two or three additional screws (depending on type) for removal the back plate from the chuck. They are not used to mount the chuck to the back plate, mounting screws should be included with the chuck
self_centering
independent
1

Back Plate Dimension

  • Chuck Size: 3"
  • A: 3.14"
  • Thread T: 3/4"-16
  • D1: 2.25"
  • D2: 2.598"
  • C: No
  • E: 0.5"
  • D: No
  • B: 0.47"
  • h: 0.12"
  • No. of Bolt Holes: 6

C J M
Reviewed in the United States on April 8, 2025
Out of balance on a Sherline lath but it still needs material to fit the ER25 chuck and should balance better.
pug
Reviewed in the United States on February 23, 2024
Backplate worked well on my sherline and after turning to fit the Senou chuck the entire assembly was very accurate. Less than 2 thou runout on a test rod chucked in jaws.
D Ledbetter
Reviewed in the United States on May 11, 2023
Works fine.
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