herringbone gears without central gap

{"cid":"91212205","title":"Custom Rolling Mill Herringbone Gears Without Central Gap","imgUrl":"https:\/\/img.silkroadsl.com\/nimg\/06\/ae\/06c993fa26d06fba86817240dfd7-200x200-1.jpg","attrs":{"Price":"300","Brand Name":"YIZGEAR","Model Number":"HB2207001","Minimum Order Quantity":"1 Piece","Delivery Time":"60 days","Place of Origin":"CHINA","Payment Terms":"L\/C,D\/P,T\/T,Western Union","Supply Ability":"500 Pieces\/Month","Packaging Details":"Plywood Crate","Material":"42CrMo\/AISI 4140","Heat Treatment":"Quenching & Tempering","Manufacturing Process":"Gear Teeth Milling","Quality Grade":"ISO 8-9 Grade","Profile Type":"Herringbone Gear","Helical Angle":"22\u00b0"}}