Precise 12″ Dia. 3 Jaw Plain Back Zero-Set Self Centering Lathe Chuck – 3900-4582

• Run true “0” set.
• Made of high grade tool steel.
• Hardened and ground to the highest T.I.R. with 0.0005″ repeatability on duplicate parts.
• 2 piece top & master jaws are American Standard tongue & groove.
• 2 piece top jaws can be reversed for clamping and jamming.
• Provides increased gripping force with less jaw distortion.
• Opposing adjusting screws for “dead true” accuracy.
• Fine adjustment – Plain Back
• D1: 7.905
• D2: 5.250
• D3: 3.268
• H: 6.57
• H1: 3.98
• h: 0.803
• Z-D: 1/2-13
• Max. RPM: 2,200
• Weight: 116 lbs.

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