Chain sprockets 90 Chain sprockets 512 Split idler sprocket, machined B 1.71/43.5 OD PD S B 1.71/43.5 OD PD S Part Article-Nr. Z- Bore in PD in-mm OD in-mm S in-mm 557 55750 13 0.71* 4.25/108,0 4.18/106,1 2.25/57,2 557 55751Y 1 557 55752Y 1¹⁄₄ 557 55753Y 1⁷⁄₁₆ 557 55754Y 1¹⁄₂ 558 55850 15 0.71* 4.88/124,0 4.81/122,2 2.57/65,2 558 55851Y 1 558 55852Y 1¹⁄₄ 558 55853Y 1⁷⁄₁₆ 558 55854Y 1¹⁄₂ 559 55950 17 0.71* 5.44/138,2 5.44/138,2 2.85/72,3 559 55951Y 1 559 55952Y 1¹⁄₄ 559 55953Y 1⁷⁄₁₆ 559 55954Y 1¹⁄₂ 560 56050 18 0.71* 5.76/146,3 5.76/146,4 3.01/76,4 560 56051Y 1 560 56052Y 1¹⁄₄ 560 56053Y 1⁷⁄₁₆ 560 56054Y 1¹⁄₂ 561 56150 19 0.71* 6.07/154,3 6.13/155,7 3.16/80,4 561 56151Y 1 561 56152Y 1¹⁄₄ 561 56153Y 1⁷⁄₁₆ 561 56154Y 1¹⁄₂ 562 56250 21 0.71* 6.71/170,4 6.81/173,0 3.48/88,4 562 56251Y 1 562 56252Y 1¹⁄₄ 562 56253Y 1⁷⁄₁₆ 562 56254Y 1¹⁄₂ 563 56350 23 0.71* 7.34/186,5 7.48/190,0 3.80/96,5 563 56351Y 1 563 56352Y 1¹⁄₄ 563 56353Y 1⁷⁄₁₆ 563 56354Y 1¹⁄₂ 564 56450 25 0.71* 7.98/202,7 8.03/204,0 4.12/104,6 564 56451Y 1 564 56452Y 1¹⁄₄ 564 56453Y 1⁷⁄₁₆ 564 56454Y 1¹⁄₂ Material: Polyamide Screws: Stainless steel Nuts: Zinc plated steel 512 Split drive sprocket, machined Part Article-Nr. Z- Bore in PD in-mm OD in-mm S in-mm 557 55701Y 13 1 4.25/108,0 4.18/106,1 2.25/57,2 557 55702Y 1¹⁄₄ 557 55703Y 1⁷⁄₁₆ 557 55704Y 1¹⁄₂ 558 55801Y 15 1 4.88/124,0 4.81/122,2 2.57/65,2 558 55802Y 1¹⁄₄ 558 55803Y 1⁷⁄₁₆ 558 55804Y 1¹⁄₂ 559 55901Y 17 1 5.44/138,2 5.44/138,2 2.85/72,3 559 55902Y 1¹⁄₄ 559 55903Y 1⁷⁄₁₆ 559 55904Y 1¹⁄₂ 560 56001Y 18 1 5.76/146,3 5.76/146,4 3.01/76,4 560 56002Y 1¹⁄₄ 560 56003Y 1⁷⁄₁₆ 560 56004Y 1¹⁄₂ 561 56101Y 19 1 6.07/154,3 6.13/155,7 3.16/80,4 561 56102Y 1¹⁄₄ 561 56103Y 1⁷⁄₁₆ 561 56104Y 1¹⁄₂ 562 56201Y 21 1 6.71/170,4 6.81/173,0 3.48/88,4 562 56202Y 1¹⁄₄ 562 56203Y 1⁷⁄₁₆ 562 56204Y 1¹⁄₂ 563 56301Y 23 1 7.34/186,5 7.48/190,0 3.80/96,5 563 56302Y 1¹⁄₄ 563 56303Y 1⁷⁄₁₆ 563 56304Y 1¹⁄₂ 564 56401Y 25 1 7.98/202,7 8.03/204,0 4.12/104,6 564 56402Y 1¹⁄₄ 564 56403Y 1⁷⁄₁₆ 564 56404Y 1¹⁄₂ *Plain Bore