To select a Ta oil seal correctly, I start with three dimensions: shaft diameter, housing bore diameter, and seal width. These measurements are normally written as shaft diameter × outside diameter × width, such as 30 × 42 × 7 mm. I then check the sealing lip material, shaft speed, temperature, lubricant, pressure, and installation conditions before confirming the part number.
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The size chart below is a practical reference for common metric oil seal dimensions, but it should not replace a drawing or supplier confirmation. Ta oil seal naming and availability can vary by manufacturer, lip design, spring arrangement, and material. At TEBIETE, I recommend sending the measured dimensions and operating conditions together so we can verify the correct construction before quotation or production.
A Ta oil seal is generally used to retain lubricating oil or grease while helping prevent dust, water, and other contaminants from entering a rotating assembly. In many industrial catalogues, “TA” may identify a specific profile, a rubber-covered outside diameter, or a product-series designation. Because naming conventions are not universal, I treat the dimensional code and construction drawing as more reliable than the series name alone.
The first number normally represents the shaft diameter, often called the bore or inner diameter of the seal. The second number represents the housing bore or outside diameter, while the third number represents the axial width. For example, a 40 × 62 × 8 mm seal is intended for a nominal 40 mm shaft, a 62 mm housing bore, and an 8 mm installation width, subject to the relevant dimensional standard and design tolerances.
The following table provides common metric size references that may be used when preparing a Ta oil seal inquiry. These are dimensional examples rather than a statement that every listed size is available in every Ta profile or material. I advise buyers to confirm the exact cross-section, lip arrangement, and tolerance requirements with the supplier before placing an order.
| Reference size d × D × b | Typical dimensional use | Information to verify |
|---|---|---|
| 20 × 35 × 7 mm | Compact shafts and small gear or motor assemblies | Shaft finish, available housing depth, and spring design |
| 25 × 40 × 7 mm | Small pumps, reducers, and general machinery | Oil type, speed, and whether a dust lip is required |
| 30 × 42 × 7 mm | Compact rotating equipment with limited radial space | Housing bore condition and installation method |
| 35 × 52 × 7 mm | Medium-duty shafts and transmission components | Temperature, pressure, and shaft runout |
| 40 × 62 × 8 mm | Gearboxes, industrial drives, and larger rotating units | Housing width, lubricant compatibility, and speed |
| 50 × 72 × 8 mm | Medium-size industrial machinery and wheel-end applications | Contamination level, radial load effects, and seal orientation |
Width is especially important when the housing has a fixed shoulder or retaining ring. A seal that matches the shaft and housing diameters may still be unsuitable if its width interferes with adjacent components. I therefore compare the available installation depth with the nominal seal width and allow room for correct seating without forcing the seal beyond its designed position.
Material selection should follow the fluid and temperature environment rather than price alone. Nitrile rubber, often identified as NBR, is commonly considered for general mineral-oil applications and moderate service conditions. Fluorocarbon rubber, commonly called FKM, is often considered when higher temperature or improved chemical resistance is required, while EPDM is generally evaluated for water-based fluids but is not normally selected for petroleum oil service without specific compatibility confirmation.
As a conservative material reference, NBR is often evaluated for service around approximately 100°C, while FKM may be considered for temperatures approaching approximately 200°C. These are general selection ranges, not guaranteed operating limits, because the actual rating depends on compound formulation, speed, pressure, lubricant, and continuous versus intermittent duty. I confirm the supplier’s material data before recommending a final seal.
I first measure the shaft diameter at the actual sealing track, the housing bore, and the available axial width. Measurements should be taken at several points when possible because wear, ovality, or damage can distort a single reading. If the old seal is available, I also record its printed size, lip direction, material marking, and construction features.
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The dimensions alone do not determine suitability. I ask for shaft speed in revolutions per minute, lubricant type, operating temperature, pressure, contamination level, and whether the shaft rotates continuously or intermittently. For example, a seal operating at 3,000 rpm may require more careful review of lip friction, heat generation, shaft finish, and eccentricity than a low-speed gearbox seal.
For clean mineral oil and moderate temperatures, an NBR construction may be a practical starting point. For elevated temperature, aggressive additives, or certain synthetic lubricants, I evaluate FKM or another compatible compound rather than assuming that standard rubber will perform adequately. If the equipment is exposed to dust or water, I review whether a dust lip or a separate protective arrangement is needed.
A suitable oil seal can leak if the shaft has a worn groove, excessive runout, burrs, or an unsuitable surface finish. I check the seal track, chamfer the housing entry where appropriate, and protect the lip from keyways or splines during installation. I also verify the sealing lip orientation: the primary lip normally faces the fluid being retained, while a dust lip faces the contamination side.
When preparing an inquiry, I recommend providing the size in millimetres, the required quantity, the target application, and any drawing or photograph of the existing part. Buyers should specify whether they need a standard replacement, an equivalent construction, or a customized seal. They should also identify whether packaging, marking, inspection records, or mixed-size supply is important for their purchasing process.
Price should be evaluated together with material, tooling, minimum order quantity, packaging, and lead time. A low unit price may not be economical if the wrong profile causes premature replacement or requires urgent freight. For repeat programs, I normally discuss forecast quantity, batch control, sample approval, and the acceptable dimensional documentation before production begins.
At TEBIETE, I support B2B buyers by reviewing dimensional requirements, application conditions, material preferences, and purchasing quantities before confirming a Ta oil seal quotation. We can discuss standard sizes and assess whether a requested profile requires a drawing review or customized production. This approach helps reduce errors caused by relying on a size code without checking the complete seal construction.
For a practical inquiry, send the required d × D × b size, material preference, lubricant, working temperature, shaft speed, pressure, quantity, and delivery destination. If the original seal is unavailable, a housing and shaft measurement, equipment model, or clear product photograph can help us identify the information still needed. I will then help organize the specifications for sample evaluation and purchasing review.
The correct Ta oil seal is not simply the part with the closest printed dimensions. I select it by confirming the shaft diameter, housing bore, width, sealing construction, material, and operating conditions as one complete specification. The size chart can help narrow the options, but the final choice should be checked against the actual equipment and supplier drawing.
As the next step, prepare the three primary dimensions and the operating data, then send them to TEBIETE for review. By confirming the seal profile, material, quantity, and delivery requirements before ordering, I can help buyers reduce sourcing risk and move more efficiently from size identification to sample approval and production.
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