Shars 8" 4 Jaw Independent Lathe Chuck Tir Certificate + D1-4 Back Plate New R[

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Seller: discount_machine ✉️ (262,304) 99.8%, Location: Saint Charles, Illinois, US, Ships to: US & many other countries, Item: 303162422577 SHARS 8" 4 JAW INDEPENDENT LATHE CHUCK TIR CERTIFICATE + D1-4 BACK PLATE NEW R[.

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 Description

 

MFG SKU # 202-5421
Brand Shars Tool
Thru Hole Size 2.205
Bolt Circle Diameter 3.740
TIR (INCH) 0.0039
Number of Jaws 4
Max Capacity 7.87
Lathe Chuck Category Independent Lathe Chucks
Chuck Diameter 8
Mounting Plain Back
Chuck Thickness 2.953
Jaw Movement Independent
Maximum RPM 2100
Min Capacity 0.394

 

  Product Application

For use gripping odd shaped work

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.
  • Accuracy is maintained for the entire clamping range
  • Semi-steel chuck body made from high quality cast iron

  • Four operating screw design with each ground and hardened to HRC 43
  • Both side of jaw teeth and guides are ground and hardened to HRC 58-62

  • Four jaws allow a square component to be perfectly centered to the chuck while achieving maximum gripping force
  • 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

  • Operating screw'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

  • plain back mounting

Clamping Range:

 

  • Internal Jaw:
    • Clamping Range A-A1: 0.393-3.937"
    • Clamping Range B-B1: 2.480-7.874"

 

                   
What's Included
  • Included 1 Set of Reversible Solid Hard Jaws
  • 4 PCS of M10 Mounting Screws
  • 1 Lathe Chuck Key
  • Inspection report on runout on both inside and outside jaws

 

Related Products

 

SKU: 202-7491 SKU: 202-6203
7.12" D1-5 Fully Machined Lathe Chuck Back Plate for 8" Independent Chuck 6.3" Threaded Back Plate with 1-1/2 x 8 TPI for 8" 4 Jaw Independent Chuck

 

SKU: 202-2031 SKU: 202-7490
3/8" Self-Ejecting Lathe Chuck Key

6.3" D1-4 Fully Machined Lathe Chuck Back

Plate for 8" Independent Chuck

 

 

 

 

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

 

 

SHIPPING: UPS Ground

Buyer pays ACTUAL UPS shipping & insurance, and a $3.00 handling fee for this item to be shipped to all states within the continental United States. Hawaii, Alaska & and other United States Territories will ship via UPS BLUE. Canada will pay actual shipping costs plus duty fees via UPS.  We can combine other auctions or store items to save on shipping. You may ask for freight cost before buying tools. Shipment will be made the same day as your payment is received and an UPS tracking number will be email to you. If your order is being shipped to an address outside of the United States, local consumer tax and/or customs duty , brokerage charges may apply and the package's recipient may need to pay these to clear customs.

PAYMENT:

We accept VISA, MasterCard and E-Check on PayPal.com Illinois resident adds 8% sales tax.


RETURNS:

If the item stated as brand new is found defective on arrival or incorrect item was shipped, buyer understands that the product will be repaired or replaced at seller's discretion, and be given a reasonable amount of time. Buyer is responsible for return shipping costs and insurance. Warranties are offered by the manufacturer and will be honored by the manufacturer. All shipping and handling fees will not be returned in any case.


Any questions regarding our tools, feel free to email us at our eBay Message Box

 

  • Condition: New
  • Brand: Shars Tool
  • MPN: 202-5421+202-7490

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