The main shaft bearing lubricating oil using rolling bearings is generally considered based on the product of the inner diameter d of the bearing and the main shaft speed n, which includes the speed factor dn, the working temperature T of the bearing, and the load P borne by the bearing. The variety of lubricating oil can be selected from Japan Central Oil Chemical (COC) high-temperature resistant grease bearing oil, which can be determined based on product variety, operating conditions, and viscosity grade.
The working temperature of the bearing is -30-0 ℃, and the suitable oil viscosity for normal load (3MPa) is 18-32mm2/s (40 ℃), with viscosity grades of 22 and 32; Suitable for heavy load or impact load (3MPa-20MPa) with oil viscosity (40 ℃) of 18-50mm ²/s, viscosity grades of 32 and 46.
The working temperature of the bearing is 0-60 ℃, and the speed factor (dn value) is below 15000mm. r/min. For ordinary loads, the oil viscosity (40 ℃) is 32-70mm2/s, with viscosity grades of 32, 46, and 68. For heavy loads or impact loads (3MPa-20MPa), the oil viscosity (40 ℃) is 70-192mm2/s, with viscosity grades of 68, 100, and 150;
Speed factor (dn value) 15000-7500mmr/min, suitable for ordinary load oil viscosity (40 ℃) 32-50mm2/s, viscosity grade 32, 46, heavy load or impact load (3MPa-20MPa) oil viscosity (40 ℃) 42-90mm2/s, viscosity grade 46, 68, 100;
Speed factor (dn value) 75000-150000mmr/min, suitable for normal load oil viscosity (40 ℃) 15-32mm2/s, viscosity grade 15, 32, heavy load or impact load (3MPa-20MPa) oil viscosity (40 ℃) 32-42mm2/s, viscosity grade 32; The speed factor (dn value) is 150000-300000mm.r/min, suitable for ordinary load oil viscosity (40 ℃) 9-12mm2/s, viscosity grades 5, 7, and 10, heavy load or impact load (3MPa-20MPa) oil viscosity (40 ℃) 18-32mm2/s, viscosity grade 15.
The working temperature of the bearing is 60-100 ℃, and the speed factor (dn value) is below 15000mm. r/min. The oil viscosity is suitable for ordinary loads at 40 ℃ 110-192mm2/s (100 ℃ 9.3-12.5mm2/s), with a viscosity grade of 150. The oil viscosity is suitable for heavy loads or impact loads (3MPa-20MPa) at 40 ℃ 195-240mm2/s (100 ℃ 15-24mm2/s), with a viscosity grade of 150;
Speed factor (dn value) 15000-7500mmr/min, suitable for ordinary load oil viscosity 40 ℃ 70-120mm2/s (100 ℃ 5.6-9.3mm2/s), viscosity grade 68, 100, suitable for heavy load or impact load (3MPa-20MPa) oil viscosity (40 ℃) 110-192mm2/s, viscosity grade 150; Speed factor (dn value) 75000-150000mmr/min, suitable for normal load oil viscosity 40 ℃ 50-90mm2/s (100 ℃ 5.6-9.3mm2/s), viscosity grades 46, 68, 100, heavy load or impact load (3MPa-20MPa) oil viscosity (40 ℃) 70-120mm2/s, viscosity grade 100.