To select the correct Tg oil seal, start with three primary dimensions: shaft diameter, housing bore diameter, and seal width. Then confirm the lip design, sealing material, spring configuration, operating temperature, speed, pressure, and the actual Tg profile used by your supplier. I recommend treating “Tg” as a product or profile designation rather than assuming that every manufacturer uses the term identically. A complete inquiry should therefore include the seal code, a drawing or sample, the application conditions, and the required quantity.
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This guide is written for B2B purchasing teams, maintenance engineers, distributors, and OEM designers who need to identify, replace, or source Tg oil seals. It is useful when an existing seal is worn, the original marking is incomplete, or a new machine requires a compatible rotary shaft seal. I focus on practical specification checks that help reduce incorrect quotations and avoid unsuitable substitutions.
TEBIETE supplies oil seals for industrial sourcing programs and can review dimensional information, operating conditions, material requirements, and packaging needs before quotation. Because oil seal performance depends on the complete application, I do not recommend selecting a replacement from outside diameter alone. The shaft, housing, lip, material, and operating environment must be considered together.
In most oil seal applications, the size is expressed as inner diameter × outer diameter × width, usually in millimeters. The inner diameter must match the shaft, the outer diameter must fit the housing, and the width must fit the available axial space. For example, a specification written as 35 × 52 × 7 mm generally identifies a seal for a 35 mm shaft, a 52 mm housing bore, and a 7 mm installation width.
These three dimensions identify the basic envelope, but they do not fully define the product. A Tg oil seal may also have a specific rubber compound, metal case treatment, garter spring, dust lip, pressure capability, or installation direction. When replacing a seal, I advise buyers to record the original marking and measure the removed part only after checking whether wear or deformation has changed its dimensions.
Markings vary by manufacturer, so the same sequence of letters and numbers should not be interpreted without a catalog, drawing, or supplier confirmation. A typical marking may identify the size, profile, material, or special lip arrangement. If the marking is unclear, send a clear photograph together with the measured shaft diameter, housing diameter, and width.
Dimensional measurement should be made with suitable tools and should account for burrs, corrosion, dirt, and chamfer geometry. For procurement records, I recommend documenting measurements to at least 0.1 mm where practical, while recognizing that the required production tolerance depends on the relevant drawing and application. The final replacement should be checked against the supplier’s controlled specification rather than relying only on a nominal measurement.
NBR is commonly considered for general-purpose mineral oil and grease applications, while FKM is often evaluated where higher temperature or stronger chemical resistance is required. These are general selection directions, not universal approvals, because compound formulation, fluid type, shaft speed, and pressure all affect suitability. As an initial reference only, some commonly used NBR compounds are specified around -30°C to 100°C, while some FKM compounds may be specified around -20°C to 200°C; the exact limits must come from the selected compound and supplier data.
For water, aggressive chemicals, food-related equipment, or biodegradable fluids, I recommend requesting a material compatibility review rather than selecting by temperature alone. The lubricant may swell, harden, soften, or otherwise change the rubber depending on its additives and operating conditions. If the application involves frequent cleaning, outdoor exposure, or ozone, include those conditions in the inquiry.
The primary lip retains lubricant and blocks contaminants, while an auxiliary dust lip may provide additional protection in dirty environments. A garter spring normally supports radial lip contact, but spring material and configuration should be confirmed when the seal is exposed to moisture, chemicals, or unusual temperature. A seal designed for a low-pressure oil-retention application should not automatically be used in a pressurized chamber.
Rotational speed is also application-specific. A shaft speed of 3,000 rpm, for example, creates different heat and lubrication demands from a slow gearbox shaft, even when the seal dimensions are identical. I recommend providing shaft speed in rpm, pressure in MPa or bar, lubricant type, and duty cycle so the supplier can evaluate the correct profile.
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Begin by identifying the shaft diameter, housing bore, available width, shaft rotation direction, and installation orientation. Inspect the shaft for a wear groove, corrosion, roughness, or excessive runout because a new seal may not solve a damaged shaft condition. Also check whether the old seal has a dust lip, a metal case, a rubber-covered outside diameter, or a special external sealant.
Record the lubricant, temperature range, rotational speed, pressure, contamination level, and expected operating hours. Include start-stop frequency and storage conditions when the machine is used intermittently. This information helps distinguish a standard oil seal from a material or profile designed for more demanding service.
Compare the measured dimensions with the supplier drawing and confirm the material, lip arrangement, spring, and allowable operating conditions. If the original code is available, use it as a starting point but still verify the dimensions and application. For new equipment, I recommend approving a technical drawing or sample before placing a repeat production order.
A useful request for quotation should include size, profile, material, quantity, packaging, delivery destination, and application details. Add an assembly drawing or photographs if the seal has a non-standard Tg shape. This allows the supplier to quote the intended product instead of making assumptions from a short keyword such as “Tg oil seal.”
Pricing for Tg oil seals depends on size, material, mold requirements, spring and case options, quantity, packaging, and inspection requirements. Standard catalog dimensions are usually easier to source than special profiles, but availability should be confirmed for each project. Custom tooling or a non-standard material may affect minimum order quantity and production planning.
For a reliable quotation, I suggest separating the request into standard replacement items and custom development items. State whether you need trial samples, pre-production approval, individual bags, bulk cartons, traceable batch identification, or export packaging. A supplier can then provide a more realistic commercial proposal instead of an incomplete unit price.
At TEBIETE, I approach Tg oil seal sourcing as a specification-matching process rather than a simple size search. Our support can include reviewing dimensions, confirming material options, checking profile requirements, discussing packaging, and organizing samples for buyer evaluation. Where the application information is incomplete, I will identify the missing technical points before recommending a final specification.
For repeat B2B orders, we can also discuss drawing control, batch consistency, labeling, packing configuration, and export coordination. These details are important for distributors and equipment manufacturers that need stable identification across multiple purchase orders. Any performance limits, inspection requirements, or customization scope should be agreed in the product specification before mass production.
The correct Tg oil seal is the one that matches both the dimensional envelope and the operating conditions. Measure the shaft, housing, and width; record the lip and case design; then confirm material, speed, temperature, pressure, and lubricant compatibility with the supplier. If you are replacing an existing seal, include its marking and photographs because the designation may vary between manufacturers.
To request a Tg oil seal quotation from TEBIETE, send the size in millimeters, application conditions, required material if known, estimated quantity, and delivery requirements. If you do not have a complete specification, send the old seal, drawing, or installation details for review. This gives us a practical basis to recommend a suitable product and support your replacement or sourcing decision.
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