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Uniiso Forged Sprocket for Conveyor Chains/Sprocket. Professional Manufacturer: Owns punching, forging, and casting workshops in Shanghai, China. OEM Service Available: Supports custom manufacturing for non-standard sprocket requirements. Wide Material Selection: Available in SCR440, Scm440, 45c, 4140, 4340, and 1045 steel. High Hardness Standard: Heat treatment achieves HRC55-60 for hardened tooth surfaces. Competitive Pricing: Direct factory pricing ensures cost-effectiveness for bulk orders.