RB1
Kemper RB1 · 105 mm (4 1/8 in) rib · Profile: a rounded rectangle with a notch cut into one end · Smooth-finished hardwood · Trues the wall and compresses the surface
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A 105 mm (4 1/8 in) hardwood potter's rib for shaping and compressing on the wheel. The profile is a rounded rectangle with a notch cut into one end.
RB1 is the 105 mm (4 1/8 in) rib in Kemper's potter's rib range. The profile is a rounded rectangle with a notch cut into one end. Kemper cuts these ribs from smooth-finished hardwood. A rib does two jobs at once on the wheel: it trues the wall and it compresses the surface, which is what closes up the throwing rings and reduces the chance of an S-crack later.
