MR26 Gearbox Assembly

Assembling four upright and gearbox assemblies for MRacing's MR26 — Michigan's full scale FSAE racecar.

FIG. 01 MR26 / GEARBOX ASSEMBLED VIEW — NL

[ HERO IMAGE ] Save as images/mr26-hero.png

Process

Producing MR26's 4 corner assemblies through several days of precise assembly

Inboard half-spindle assembled using arbor press to press fit seal and wheel bearing
Large and small planet gears clocked using jig and polygonal spline, then aligned with sun gear in gearbox and secured with steel pins
Ring gear pressed into outboard half-spindle and secured with dowel pins, wheel bearing pressed in last
Compression plate secures assembly together and preloads bearings, safety wired

FIG. 02 — NL

[ CAD DESIGN ]mr26-process-1.png

FIG. 03 — NL

[ COMPONENTS ]mr26-process-2.png

FIG. 04 — NL

[ ASSEMBLY ]mr26-process-3.png

FIG. 05 — NL

[ FINISHED ]mr26-process-4.png

10TH

Overall at FSAE national MIS competition

Driving-induced gearbox defect across 350 km of driving

20,000RPM

Maximum with no reliability concerns