Technical requirements

(A) the provisions of the ferrule used in line with GB/T3077-1999 42CrMo alloy steel quenched and tempered or normalized, we can use a comparable or better performance of other materials. Ball used in line with GB/T18254-2002 requirements or GCr15SiMn GCr15 bearing steel, we can use the performance equal to or better other materials.
(2) Heat treatment: ferrule hardness after quenching, quenching the gear tooth surface hardness of the raceway surface quenching hardness, effective case depth shall comply JB/T10705-2007 "Rolling wind turbine bearings" standards. Ball heat treatment quality should meet JB/T1255-2001 requirements.
(3) low-temperature impact energy ferrule -20 ℃ AKV not less than 27J.
(4) clearance for the small clearance and negative clearance to reduce shock and vibration, improve the carrying capacity, and in the case of reduced bearing vibration fretting wear. Yaw Roller bearing axial clearance is defined as 0 ~ 50 μm, pitch bearing axial clearance should not be greater than 0.
(5) consistent with HG/T2811-1996 standard nitrile rubber, is comparable or better performance can be made ??of other materials of the seal ring.
(6) shall be GB/T7736-2001 standard ferrule Class II requirements for testing.
(7) In addition to the raceways and gear parts, other surfaces should GB/T9793 and JB/T8427-1996 requirements for thermal spraying anti-corrosion treatment, may also have to meet their performance requirements in other preservative methods.
(8) starting frictional torque requested by the user.
(9) bearing parts should have white spots, inclusions, parts surface should not have cracks, corrosion, burns, bump and soft spots and other defects.