Purchased this new and used in lighting manufacturing business. This is straight shank, 1/2". Used primarily on 18 ga. mild steel and .063 or thinner aluminum. Probably between 300-450 taps made with this machine.

　　Several features are:

　　? Balanced heat-treated gear reversing mechanism minimizes strain and wear

　　? Reverses at twice forward speed to increase productivity and avoid tap jamming

　　? No tap overtravel...excellent for blind or shallow holes

　　? Bronze bushings at wear points supporting the spindle from shank to chuck

　　? Extremely sensitive friction clutch engages conical surfaces of drive and reverse shells with smooth, "cushioned" action, allowing sensitive operator feel. Assures automatic tap protection.

　　? One-piece TRU-GRIP or Pro-Quik spindle assures true alignment

　　Series #: Max Speed Serial#:

　　12 RPM 800