SUC208 belongs to the standard metric model of the "Stainless Steel Outer Spherical Ball Bearing" series (corresponding to British shaft diameters and variants such as SUC208-24 and -25). Its core task is to directly replace ordinary bearing steel UC208 in humid, salt spray, chemical cleaning, or food grade flushing environments, achieving corrosion-resistant, washable, self-aligning, and easy to maintain seat installation.
1、 Key dimensions and loads
Inner diameter d: 40mm
Outer diameter D: 80 mm
Total width B: 49.2mm
Basic rated dynamic load Cr: 22.8-23.6 kN; Static load Cor: 13.6-18.9 kN (slightly different data from different manufacturers)
Extreme speed (grease lubrication): ≈ 3300 r/min
Working temperature: -20 ℃~+120 ℃ (standard silicone seal)
2、 Materials and Sealing
Ring/rolling element: AISI 440C (9Cr18Mo) stainless steel, vacuum quenched and tempered HRC ≥ 58
Holder/dust cover frame: AISI 304
Sealing: double-sided contact silicone sealing ring, waterproof, alkali resistant, and salt spray resistant; Optional food grade solid grease for lifelong lubrication free
3、 Typical usage scenarios
Food and beverage: filling machine, homogenizer, CIP cleaning pump, fruit and vegetable conveyor; The whole machine can be washed under high pressure without rust powder falling off.
Medicine and biochemistry: centrifuge, reactor stirring, purified water circulation pump; Meet the requirements of "easy to clean and corrosion-resistant" in GMP workshops.
Chemical and marine industries: seawater desalination pumps, electroplating line elevators, outdoor belt conveyor rollers; Resistant to salt spray and weak acids and bases.
Low temperature/high humidity: ice maker, cold storage conveyor; 440C maintains toughness at low temperatures and will not crack brittle.
Heavy duty conveying and agricultural machinery: organic fertilizer pellet machine, cleaning vehicle brush roller, wind power generation auxiliary equipment; In situations where external spherical alignment is required and there is no fear of washing.
4、 Supporting seat body (complete set of stainless steel)
SUCP208 (vertical seat)
SUCF208 (square flange with four holes)
SUCFL208 (diamond flange)
SUCT208 (slider seat)
There is no risk of coating peeling off on the entire machine, and it is used to flush the environment in one step.
one-sentence summary
SUC208 is the UC208 that is "not afraid of water flushing, not afraid of salt spray, and does not require oil replenishment". Wherever UC208 is used, it is afraid of rust, needs to be adjusted, and needs to be washed frequently, so it is directly replaced -40mm axis food filling machines, seawater pumps, and pharmaceutical centrifuges are the most common positions.