Small Mecanum Wheel - 3/8 inch Hex bore for FRC

prusaprinters

<p>Ultra lightweight and some of the smallest mechanums available. Print in PETG.Ream all the roller shaft holes with an 1/8inch drill bit and hand drill. Ream the two screw holes with a 3mm bit. Ream all the roller holes with a 3.5mm bit.&nbsp;</p><p>From McMaster-Carr you need to acquire the following:</p><figure class="table" style="width:100.0%;"><table><tbody><tr><td style="padding:.05in 0in;vertical-align:top;width:4.6%;">1</td><td style="padding:.05in 0in;vertical-align:top;width:11.18%;"><a href="https://www.mcmaster.com/nav/enter.asp?partnum=97155A419">97155A419</a></td><td style="padding:.05in 0in;vertical-align:top;width:42.1%;">Acetal Dowel Pins, 1/8" Diameter, 3/8" Long, Packs of 50</td></tr><tr><td style="padding:.05in 0in;vertical-align:top;width:4.6%;">2</td><td style="padding:.05in 0in;vertical-align:top;width:11.18%;"><a href="https://www.mcmaster.com/nav/enter.asp?partnum=94879A122">94879A122</a></td><td style="padding:.05in 0in;vertical-align:top;width:42.1%;">Off-White Nylon Phillips Rounded Head Screws, M3 x 0.5 mm Thread, 12 mm Long, Packs of 100</td></tr><tr><td style="padding:.05in 0in;vertical-align:top;width:4.6%;">3</td><td style="padding:.05in 0in;vertical-align:top;width:11.18%;"><a href="https://www.mcmaster.com/nav/enter.asp?partnum=93800A116">93800A116</a></td><td style="padding:.05in 0in;vertical-align:top;width:42.1%;">Nylon Hex Nut, M3 x 0.5 mm Thread, Off-White, Packs of 100</td></tr></tbody></table></figure><p>Acetal pins press into the holes (after reaming) and stay in place with friction. (And possibly a dot of glue on the back if your 1/8" bit drills oversize holes - I didn't need any glue personally)</p><p>Used nylon screws because they save weight when you have a bunch of these rollers. We have 30 on our bot. (team 3140)</p>