Screw type auxiliary take-ups for live rollers (type "R" above) are commonly used on models 196VP, 196LR, 196CALR and 251CALR for additional belt take-up while belt conveyor models 250TB, 350SB, 350BSB, 350BOS, 196RB, 196RBF, 350SBF and 251RB utilize type B for additional belt take-up.