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3.1″ 3-Jaw Self-Centering Chuck Body – ER-16 Thread
Three-jaw self centering chucks are designed so that all three jaws move together and automatically center round or hexagonal parts or stock to within a few thousandths of an inch. They are designed so that they can be used to clamp externally on bar stock or internally on tube stock. The jaws are reversible to accommodate larger stock.
Related products
3.1″ 4-Jaw Chuck – ER-16
For use on the ER-16 headstock only
Not for use on the standard headstock that comes on all Sherline Machines
ER-16 Headstock and Motor Unit
The 3308 would replace the standard headstock, motor and speed control assembly that come on Sherline machines.
The ER-16 nut that ships with your order may be plain or have a black oxide finish.