OEM High Quality CNC Machining Server Enclosure Bevel Gear Spiral Bevel Gear Straight bevel gear is also named straight miter gear, tooth trace parallel to generating line of pitch cone, always applied in paired set. It transmits torque & rotary power between intersecting shafts (standard 90°, custom 0~180° optional). Main raw materials: 45# steel,40Cr,20CrMnTi,42CrMo, three heat-treatment options: normalized for economy, induction hardening for medium load, carburizing