South Bend 9A 9B 9C and 10K lathe gears (14.5 PA, 18DP)

thingiverse

Print the ones you need. All gears are 3/8 inch thick and have 9/16 inch hole diameter and 1/8 inch keyway. The diametral pitch is 18, and the pressure angle is 14.5 degrees. Designed in Fusion 360. Why these sizes? The collection includes several non-standard sizes (e.g. 27T). I use them as stud gears on my South Bend 10K to cut metric threads. For this you will need a metric conversion gear (see below for an approximation you can print), and some calculations. Approximation for the metric conversion gear. The conversion is a 63T gear bolted on the 80T idler gear. The 80T idler gear should come with most lathes. The 80/63 approximation to the exact 127/100 conversion double gear is pretty good (the error is 0.0125% or 1.5 thousandths over a foot). See my other printy-thingy for the 63T conversion gear (whole or rim): https://www.thingiverse.com/thing:2993608 Take a look at MrPete's videos such as https://www.youtube.com/watch?v=V6Aq0d1070I These things do last for hobby work or in a pinch. KouPouVou -- klassiKI peRIptosi VLAvis κπβ -- κλασσική περίπτωση βλάβης