SHARS 8" 4 JAW INDEPENDENT LATHE CHUCK TIR CERTIFICATE + D1-4 BACK PLATE NEW R[

Description

SHARS 8" 4 JAW INDEPENDENT LATHE CHUCK TIR CERTIFICATE + D1-4 BACK PLATE 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
Product Code
202-5421+202-7490
Chuck Product description
Product description
Chuck diameter: 8"
Thickness: 2.953"
Thru Hole Diamter: 2.953"
Bolt Circle Diameter: 3.740"
Number of Jaws: 4
Back mounting: Plain back
Product application
For use gripping odd shaped work
Product features
Chuck includes one set of reversible jaws
Jaws are individually adjustable
Four jaws allow a square component to be perfectly centered to the chuck while achieving maximum gripping force
Chuck bodies are semi-steel
Jaws are made of high quality carbon steel, and hardened
Thrust bearings and operating screws are made of case hardened steel
Internal Jaw:
Clamping Range A-A1: 0.591-5.118"
Jamming Range B-B1:  3.150-9.843"
size (inch)
Back Mounting
D (inch)
D1 (inch)
D2 (inch)
D3 (inch)
H (inch)
H1 (inch)
h (inch)
h1 (inch)
z-d (metric)
8
plain back
7.874
2.953
3.740
2.205
4.331
2.953
0.236
　
4 x M10
Product includes
Included 1 set of reversible solid hard jaws
4 mounting screws
1 lathe chuck key
Back Plate (202-7490)
Description:
Diameter: 7.87"
Taper: D1-4
Diameter Of Stud: 5/8"
Studs Included:  3
Shoulder Diameter: 3.149"
Bolt Circle Diameter: 4.409"
Mounting Holes for Lathe Chuck: 4
Product application
This machined back plate is designed to mount onto our 8" 4 jaw independent lathe chuck (p/n 202-5421). The mounting holes to mount the back plate to the chuck are drilled and tapped, and the registration (shoulder) needs to be slightly turn down to match the recess on the back of the lathe chuck.
If your chuck has 4-M10 and D2=3.740", this back plate will fit your chuck.
Product features
Made from high grade cast iron
Fits most 8" self centering plain back chuck (please verify the bolt circle diameter and shoulder diameter on the back of the lathe chuck)
How to process back plate to guarantee Chuck's T.I.R?
Fully machined back plate can be mounted onto 8" 4 jaw self Independent chuck (p/n 202-5421).
As long as back plate Shoulder Diameter > chuck's D1, all 8" 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.
Lathe
Lathe Chuck Diameter
BRAND
MODEL
SWING
SPINDEL THREAD
3"
4"
5"
6"
ATLAS
6"
1/2"-20
202-6231
ATLAS
10100
6"
1"-10
202-6107-6, 202-6107-3
ATLAS
TH42
10"
1 1/2"-8
202-6230
202-6108-6, 202-6108-3
202-6192
202-9106, 202-6119
ATLAS
5991
12"
1 1/2"-8
202-6230
202-6108-6, 202-9108-3
202-6192
202-6109, 202-6119
ATLAS
3986
12"
1 1/2"-8
202-6230
202-6108-6, 202-6108-3
202-6192
202-6109, 202-6119
EMCO MAIER
MAXIMAT V10
5"
M39X4MM
202-6214
202-6215, 202-6217
GRIZZLY
G8688
7"
3" FLANGE
GRIZZLY
G4000
9"
M39X4MM
202-6214
202-6215, 202-6217
HARBOR FREIGHT
33684
7"
3" FLANGE
HARBOR FREIGHT
45861(BV20)
9"
M39X4MM
202-6214
202-6215, 202-6217
HOMIER
03911
7"
3" FLANGE
JET
920N
9"
1 1/2"-8
202-6230
202-9108-6, 202-6108-3
202-6192
202-6109, 202-6119
KING
CH-920 AG
9"
M39X4MM
202-6214
202-6215, 202-6217
LOGAN
9"
1 1/2"-8
202-6230
202-9108-6, 202-6108-3
202-6192
202-6109, 202-6119
LOGAN
10"
1 1/2"-8
202-6230
202-9108-6, 202-6108-3
202-6192
202-6109, 202-6119
LOGAN
11"
2 1/4"-8
202-6234
202-6110, 202-6120
LOGAN
12'
2 1/4"-8
202-6234
202-6110, 202-6120
LOGAN
6510/6560
14"
2 1/4"-8
202-6234
202-6110, 202-6120
MICRO-MARK
82710
7"
3" FLANGE
MICRO-MARK
82500
7"
3" FLANGE
SEARS
101.07301
6"
1"-8
202-6106-6, 202-6106-3
SEARS
101.2899
12"
1 1/2"-8
202-6230
202-6106-6, 202-6106-3
202-6192
202-6109, 202-6119
SHELDON
WM-46-P
13"
2 1/4"-8
202-6234
202-6110, 202-6120
SHERLINE
ALL
3.5"
3/4"-16
202-6212
SIDNEY MACHINE
LOT 160
14"
2 1/4"-8
202-6234
202-6110, 202-6120
SOUTH BEND
CL187ZB
10"
2 1/4"-8
202-6234
202-6110
All Available to Ship NOW! at Fixed Prices
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RETURNS:
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