Steel unhardened chuck for turning centers. A simple and reasonably safe chuck compared to a jaw chuck. Simple and reliable and compact. Allows you to work in close proximity to it. Thread 1 '- 8 UNC (8tpi). Parts are easily and securely fastened in the chuck, as the chuck has a small inner cone. It is also possible to work without a back center.
Made at the PETROGRAD joinery and carpentry tools factory.
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