Wheel diameter directly controls minimum curve radius—smaller wheels create tighter contours but handle thinner material. The 22" benchtop accepts 16-18 gauge stock and fits retrofit shops; the 32" professional handles 14 gauge and forms broader, shallower curves. Choose based on panel size and material thickness your typical jobs require.

Benchtop wheels (22") are rated for 16-18 gauge maximum; attempting 12-gauge risks bearing damage and inconsistent forming. The 40" industrial model rated for 12-gauge has heavier construction, deeper arbor support, and higher pressure capacity. Material thickness is a critical limit—exceeding it produces poor surface finish and premature wear.

Most Grizzly English wheels are manual hand-crank or foot-pedal operated—no electric motor required, eliminating power phase concerns. Some production bead rollers use small fractional-HP motors available in single-phase. Verify motor specs on motorized models; benchtop units typically ship single-phase compatible.

Inspect arbor bearings quarterly; sealed preloaded bearings need no lubrication but should spin freely. Check adjustable roller pressure regularly—loose rollers cause material creep. Clean wheel surfaces of debris after each shift; metal dust trapped between wheel and stock creates surface marks and accelerates bearing fatigue.

One English wheel handles both materials—aluminum forms more easily than steel, so reduce roller pressure when switching. However, aluminum embeds in steel wheels if worked too aggressively; periodically polish wheel surfaces to remove embedded particles. Work aluminum first, then steel, to minimize cross-contamination on shared equipment.