Jacobs 8871 1/4″ Heavy-Duty Drill Chuck with 1/2-20 Mount and 7BA Thread

Description

Jacobs 8871 1/4″ Heavy Duty Chuck 1/2-20 Mount 7BA

Jacobs Traditional Plain Bearing Design for Heavy Duty Industrial Drilling and Lathe Work.

1/4in (6.5mm) Capacity, JACOBS K7 Key.

• Heavy Duty Design.
• Jacobs fluted sleeve design.
• Jaws Center-Grind for Straightness and Alignment.
• Through-hardened sleeve teeth, plus hardened nose and keyholes provide outstanding wear resistance.
• Each chuck 100% inspected for performance and precision.
• Chuck Capacity  : 0.04″-0.25″ (1-6.5mm)
• Key Type            : JACOBS K7
• Mount Size: Thread 1/2-20
• T.I.R. 0.004″ Maximum at half capacity.
• Length approximately 1-3/4″
• Diameter approximately 1-1/4″

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