Boxford Lathe 135 127 metric to english gear

thingiverse

Boxford Lathe 127 135 metric to english changewheel . its a big dia so your z axis has to be dead vertical which is very hard to achieve.I designed this with a printed bore initially but got a wobble as my z was a fraction off . i opened it up to 30mm bore , glue a brass plug into the 30mm bore then clock it up on the faceplate of the lathe and bore the brass bush in the plastic gear exactly to a true plum bore . I use PLA with a 3mm wall and top bottom thickness and 20% infill . if it splits it will be between the 2 gears as thats where the force is, the spokes give more wall in the perimeter area to prevent separation .The middle doesnt do much as its not a driven gear. its a work in progress so more to come, Let me know how you get on .