Category: TB oil seal

TB oil seals represent high-performance rotary shaft seals constructed with a metal outer casing and a dual-lip structure, delivering efficient sealing performance and excellent resistance to external contaminants. This seal is specially developed for applications that demand superior protection against lubricant loss and intrusion from dust, moisture, and other pollutants. The spring-loaded primary lip maintains consistent contact pressure on the rotating shaft, effectively blocking the escape of oil and grease. Meanwhile, the integrated dust lip acts as a secondary barrier, keeping harmful particles from entering the sealing area.
Featuring a full metal outer diameter, the TB seal achieves a secure and stable fit inside the housing bore, maintaining excellent structural integrity even when exposed to high temperatures, fluctuating pressures, or continuous vibration. It is particularly suitable for non-pressurized systems operating at pressures up to 0.05 MPa, delivering consistent performance within this operating range.
This type of rotary shaft seal is offered in a variety of elastomer materials to suit different working conditions, including NBR (nitrile rubber), FKM (Viton), ACM, silicone (VMQ), and EPDM. Material selection is typically based on operating temperature, chemical exposure, and lubricant compatibility.
TB oil seals are widely applied in industrial gearboxes, electric motors, water pumps, air compressors, and various types of heavy machinery operating in harsh environments. Their dual-lip design and stable metal installation make them particularly competitive in the shaft seal category. Unlike rubber-covered models such as the TC oil seal, the TB seal is the preferred choice where a precise metal-to-metal interference fit is required or where housing conditions reduce the effectiveness of rubber outer layers.
With its rugged construction, wide material compatibility, and extensive industrial applicability, the TB oil seal stands out as a highly reliable and flexible sealing solution.
This seal model is also recognized under several equivalent part designations, including WBS, OS-B11, TR-D, CRWA1, BS, MST, L1P, B1 SL, 822 S, DFS, BC, 47, EEL, R6, and KBS.