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South Bend 9A 9B 9C and 10K lathe gears (14.5 PA, 18DP) by KouPouVou
by Thingiverse
Last crawled date: 4 years, 3 months ago
Print the ones you need.
All gears are 3/8" thick and have 9/16" hole diameter and 1/8" keyway.
The diametral pitch is 18, and the pressure angle 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 thousands 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
All gears are 3/8" thick and have 9/16" hole diameter and 1/8" keyway.
The diametral pitch is 18, and the pressure angle 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 thousands 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