milling machine gear 209

milling machine gear 209.
37 teeth, lean 8 degree
49mm wide
10mm high
15mm inner diameter

The model that has "tight" in title has presize 15mm inner diameter, but your printer will probably make it 14.8 or something (nothing a bit of sand paper wouldn't fix).
I recomend printing other one, that is 15.25, wich, given printers inperfections, would give you about right size.