Belt sprockets 195 Belt sprockets 500 RR Material: Machined: Acetal resin Screws: Stainless steel Nuts: Zinc plated steel Part Article-Nr. Z- Bore in 1558 155809 16 Ø 90 x 90 1558 155810 16 Ø 90 with double keyway 500 RR Split Version Split Version Drive sprocket, molded New B S OD PD 0.59/15 1.77/45