Chain sprockets 91 Chain sprockets 815-8157 S 1.86/47.3 1.63/41.3 PD Fixing screw OD B 2.48/63 2.24/57 B S PD Fixing screw OD 815 8157 Split sprocket with guides, machined Split sprocket with guides, machined Anelli Inox / SS Guide-rings / Edelstahl Bordscheibe Anelli Inox / SS Guide-rings / Edelstahl Bordscheibe Part Article-Nr. Z- Bore in PD in-mm OD in-mm S in-mm Ø screw in-mm 503 50301GY 21 1 5.09/129,3 5.08/129,0 2.67/67,8 4.09/104,0 503 50302GY 1¹⁄₄ 503 50303GY 1⁷⁄₁₆ 503 50304GY 1¹⁄₂ 504 50401GY 23 1 5.56/141,2 5.60/142,0 2.90/73,8 4.57/116,0 504 50402GY 1¹⁄₄ 504 50403GY 1⁷⁄₁₆ 504 50404GY 1¹⁄₂ 505 50501GY 25 1 6.03/153,2 6.06/154,0 3.14/79,8 5.04/128,0 505 50502GY 1¹⁄₄ 505 50503GY 1⁷⁄₁₆ 505 50504GY 1¹⁄₂ Part Article-Nr. Z- Bore in PD in-mm OD in-mm S in-mm Ø screw in-mm 530 53001GY 21 1 5.09/129,3 5.08/129,0 2.67/67,8 4.09/104,0 530 53002GY 1¹⁄₄ 530 53003GY 1⁷⁄₁₆ 530 53004GY 1¹⁄₂ 531 53101GY 23 1 5.56/141,2 5.60/142,0 2.90/73,8 4.57/116,0 531 53102GY 1¹⁄₄ 531 53103GY 1⁷⁄₁₆ 531 53104GY 1¹⁄₂ 532 53201GY 25 1 6.03/153,2 6.06/154,0 3.14/79,8 5.04/128,0 532 53202GY 1¹⁄₄ 532 53203GY 1⁷⁄₁₆ 532 53204GY 1¹⁄₂ Material: Polyamide Guides & Screws: Stainless steel Nuts: Zinc plated steel