SHARS 8" 3 Jaw Reversible Jaws Self Centering Lathe Chuck + 1-1/2-8 Back Plate .0039" TIR Runout Certificate New

 

Each high quality chuck comes with a certification that documents TIR.

 

Product Code

 

 

Product description

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.
• American Standard
• 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 specification
• 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

• Accuracy is maintained for the entire clamping range

 

 

• Internal Jaw:
  • Clamping Range A-A1: 0.157-3.346"
  • Jamming Range B-B1:2.559 -7.874"

• External Jaw
  • Clamping Range C-C1: 2.559-7.874"

 

 

Size (inch)	Back Plate	D (inch)	D1 (inch)	D2 (inch)	D3 (inch)	H (inch)	H1 (inch)	H2 (inch)	h (inch)	z-d (metric)
8	Plain	7.874	6.496	7.087	2.559	4.803	2.953	3.150	0.197	3M-10