involute shaft for coal mining equipment

{"cid":"91212205","title":"42CrMo Forged Steel Involute Spline Shaft Spline Hobbing For Coal Mining Equipment","imgUrl":"https:\/\/img.silkroadsl.com\/nimg\/ff\/8b\/d62c70e06e98d08ec2a1b87c4e97-200x200-1.jpg","attrs":{"Price":"$50.0\/Piece","Brand Name":"YIZGEAR","Model Number":"SS22090304","Minimum Order Quantity":"5 Pieces","Delivery Time":"55 Days","Place of Origin":"CHINA","Payment Terms":"L\/C, T\/T, Western Union, D\/P","Supply Ability":"1000 Pieces\/Month","Packaging Details":"Plywood Crate","Material":"42CrMo","Manufacturing":"Spline Hobbing","Hardness":"45-50 HRC","Diameter Pitch":"220","Major Diameter":"238","Root Diameter":"215.3"}}