SHARS 6" 3 Jaw Self Centering Lathe Chucks w/ Certificate TIR + M39x4 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
SHARS 6" 3 Jaw Self Centering Lathe Chucks w/ Certificate TIR + M39x4 Back Plate New
Each high quality chuck comes with a certification that documents TIR.
Product Code
3 Jaw Chuck Description
- Diameter: 6"
- Thickness: 2.559"
- Center hole: 1.772"
- Lathe Spindle Thread Size: M39 x 4 TPI
- Runout: 0.003"
- Max. Input Torque: 160 Nm
Product application
How to process back plate to guarantee Chuck's T.I.R?
Fully machined back plate can be directly mounted onto our 6" 3 jaw or 4 jaw self centering lathe chuck (p/n 202-5433, 202-5411, 202-5473).
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.
Product features
- A matching back plate would need to be machined on the face and hub OD in order to fit this chuck. For detailed information, please look for the Shars back plate machining guide.
- Semi-steel chuck body made from high quality cast iron
- Each pinion is ground and hardened to HRC 43
- Both sides of the 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 jaws to its designated chuck body, the jaws finish machining is performed on a close tolerance state of the art CNC machine from Japan
- The scroll plate's thread flank are ground on both sides to achieve tighter contact with the master jaw
- Each chuck has gone through rigorous accuracy and repeatability inspection by clamping and jamming multiple random testing rods or rings
- Accuracy is maintained for the entire clamping range
Product includes
- 6" 3 jaw self centering lathe scroll chuck with solid hard jaws
- Included two sets of solid hard jaws: 1 set of inside jaws and 1 set of outside jaws
- 3 mounting scres
- 1 hexagon wrench
- 6" complete finished back plate for M39 x 4 TPI threaded spindle
6" Back Plate 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''
- No. of Bolt Holes: 3
Fully machined back plate can be directly mounted onto our 6" 3 jaw or 4 jaw self centering lathe chuck (p/n 202-5433, 202-5411, 202-5473).
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.
Product features
- High cast iron grade
- Fits most plain back chuck
- Fits lathe spindle with M39X4 TPI threads
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
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 | ||||