Wheel & Axle, Elementary.
This design of the traditional wheel and axle eliminates the usual cumbersome fork and pointed pivot bearings and replaces them with a simple axle and simple bearing.
The GS 302 is a simpler, more economical design with just two pulley steps. The wheel turns in a lubricated sleeve bearing formed in the wheel itself. String or thread can be attached with tape.
Tripod, post and clamp may be ordered separately.
Wabash #GS 302.
Forensics Lab Supply Number 3178302.
Formerly Grau-Hall Corporation dba Grau-Hall Scientific.
All products shipped from Wabash, Indiana.