Helical bevel reduction gears 1.metal gears:iron stainless steel 2.Size:1-90 mm 3.Small module,complexity 4.OEM Helical bevel ... .HENGKO Powder Metallurgy gear includes: bevel gear, gear, gear box, planetary gear, gear sector, sun gear, straight helical gear, helical gear, multi-layer gears, miniature gears, small module gear reducer, all ...