Belt sprockets 187 Belt sprockets 551 0.98/25 1.81/46 B OD PD S 0.98/25 1.81/46 B OD PD S Part Article-Nr. Z- Bore in PD in-mm OD in-mm S in-mm 1535 153551Y 14 1 4.50/114,2 4.47/113,5 1.99/50,7 1535 153552Y 1¹⁄₄ 1535 153553Y 1⁷⁄₁₆ 1535 153554Y 1¹⁄₂ 1536 153651Y 16 1 5.12/130,2 5.08/129,0 2.31/58,7 1536 153652Y 1¹⁄₄ 1536 153653Y 1⁷⁄₁₆ 1536 153654Y 1¹⁄₂ 1537 153751Y 18 1 5.76/146,3 5.72/145,3 2.62/66,7 1537 153752Y 1¹⁄₄ 1537 153753Y 1⁷⁄₁₆ 1537 153754Y 1¹⁄₂ 1538 153851Y 20 1 6.39/162,4 6.37/161,7 2.94/74,8 1538 153852Y 1¹⁄₄ 1538 153853Y 1⁷⁄₁₆ 1538 153854Y 1¹⁄₂ Material: Polyamide reinforced Screws: Stainless steel Nuts: Zinc plated steel 551 Split drive sprocket, molded Split idler sprocket, molded Part Article-Nr. Z- Bore in PD in-mm OD in-mm S in-mm 1535 153501Y 14 1 4.50/114,2 4.47/113,5 1.99/50,7 1535 153502Y 1¹⁄₄ 1535 153503Y 1⁷⁄₁₆ 1535 153504Y 1¹⁄₂ 1535 153506Y 1 * 1 ■ 1535 153507Y 1¹⁄₄ * 1¹⁄₄ ■ 1535 153508Y 1¹⁄₂ * 1¹⁄₂ ■ 1536 153601Y 16 1 5.12/130,2 5.08/129,0 2.31/58,7 1536 153602Y 1¹⁄₄ 1536 153603Y 1⁷⁄₁₆ 1536 153604Y 1¹⁄₂ 1536 153606Y 1 * 1 ■ 1536 153607Y 1¹⁄₄ * 1¹⁄₄ ■ 1536 153608Y 1¹⁄₂ * 1¹⁄₂ ■ 1537 153701Y 18 1 5.76/146,3 5.72/145,3 2.62/66,7 1537 153702Y 1¹⁄₄ 1537 153703Y 1⁷⁄₁₆ 1537 153704Y 1¹⁄₂ 1537 153706Y 1 * 1 ■ 1537 153707Y 1¹⁄₄ * 1¹⁄₄ ■ 1537 153708Y 1¹⁄₂ * 1¹⁄₂ ■ 1538 153801Y 20 1 6.39/162,4 6.37/161,7 2.94/74,8 1538 153802Y 1¹⁄₄ 1538 153803Y 1⁷⁄₁₆ 1538 153804Y 1¹⁄₂ 1538 153806Y 1 * 1 ■ 1538 153807Y 1¹⁄₄ * 1¹⁄₄ ■ 1538 153808Y 1¹⁄₂ * 1¹⁄₂ ■