Oil Seal 39mm-40mm-41mm ID Rotary Shaft Double Lip R23 TC TTO All Depths NBR

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Oil Seal 39mm-40mm-41mm ID Rotary Shaft Double Lip R23 TC TTO All Depths NBR

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Inner Ø x Outer Ø x Depth: 42 x 50 x 7

Packing Quantity (pcs): 10

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$17.18 USD

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TC Double Lip NBR Oil Seals for 39–44mm Rotary Shafts — Reliable Shaft Sealing Across All Depths

When a leaking rotary shaft seal causes grease contamination, premature bearing failure, or costly downtime, finding the right replacement fast matters. These TC double lip NBR oil seals are designed for mechanics, maintenance engineers, and DIY equipment rebuilders who need a dependable rotary shaft oil seal in the 39mm–44mm inner diameter range without compromise on fit or material quality.

Each seal follows the R23 / TC / TTO double lip standard, featuring a primary sealing lip and a secondary dust exclusion lip bonded to a steel-reinforced casing. Inner diameters span 42mm to 44.45mm (approximately 1.65"–1.75"), outer diameters range from 50mm to 92mm (approximately 1.97"–3.62"), and depths cover 4mm to 14mm (approximately 0.16"–0.55"). The sealing element is NBR (nitrile butadiene rubber), rated for general-purpose oils, greases, and water-based fluids.

Typical applications include agricultural gearboxes requiring a 42mm shaft seal replacement, automotive differential and transmission rebuilds needing a TC oil seal in the 43–44mm bore range, and industrial pump or motor shaft sealing where a double lip rotary seal prevents both lubricant loss and ingress of dust or moisture.

⚙️ Compatibility note: Verify your housing bore (outer diameter) and shaft groove depth before ordering. Dimensions are listed as Inner Ø × Outer Ø × Depth (mm). Fractional-dimension variants (e.g., 44.45 × 63.5 × 7.874) are inch-converted equivalents — confirm against your OEM spec sheet.

✅ Key Features of These TC Double Lip Rotary Shaft Oil Seals

🔩 Double Lip TC Design

Primary sealing lip retains lubricant; secondary dust lip blocks contaminants — the R23/TC/TTO standard used across automotive, agricultural, and industrial equipment.

🧪 NBR Sealing Element

Nitrile butadiene rubber compound resists petroleum-based oils, greases, hydraulic fluids, and water — suitable for operating temperatures typically –40°C to +120°C (–40°F to +248°F).

🔧 Steel-Reinforced Casing

Rigid metal outer shell maintains dimensional stability during press-fit installation and prevents distortion under housing bore pressure.

📐 Wide Size Coverage

Inner diameters 42–44.45mm, outer diameters 50–92mm, depths 4–14mm — over 230 size combinations available in one listing for efficient sourcing.

📦 Flexible Pack Quantities

Available in packs of 5 or 10 pieces per order — suited for single-machine repairs or workshop stock replenishment.

🔄 Direct Replacement Fit

Dimensions match standard TC/TTO cross-reference tables. Compare Inner Ø × Outer Ø × Depth against your worn seal or OEM part number before selecting.

📐 Technical Specifications — TC Double Lip Rotary Shaft Oil Seal

Seal Type	TC / TTO Double Lip (R23 standard)
Sealing Material	NBR (Nitrile Butadiene Rubber)
Casing Construction	Steel-reinforced outer shell
Inner Diameter (ID) Range	42mm – 44.45mm (approx. 1.65" – 1.75")
Outer Diameter (OD) Range	50mm – 92mm (approx. 1.97" – 3.62")
Depth Range	4mm – 14mm (approx. 0.16" – 0.55")
Lip Configuration	Primary sealing lip + secondary dust exclusion lip
Fluid Compatibility	Petroleum oils, greases, hydraulic fluids, water-based fluids
Typical Temperature Range	–40°C to +120°C (–40°F to +248°F)
Packing Quantity	5 pcs or 10 pcs per pack (see variant options)
Exact Dimensions	See variant options
Weight per Piece	See variant options

❓ Frequently Asked Questions

How do I identify the correct oil seal size for my application?

Remove the worn seal and measure three dimensions: the inner diameter (shaft size), the outer diameter (housing bore), and the depth (groove width). Match these to the Inner Ø × Outer Ø × Depth values listed in the variant selector. If your seal has an OEM part number, cross-reference it against TC/TTO standard tables — the three dimensions are the definitive match criteria.

What does "TC" or "TTO" mean on an oil seal?

TC and TTO both refer to a double lip seal design per the R23 standard. The primary lip seals lubricant inside the housing; the secondary lip (dust lip) faces outward to block dirt, water, and debris. This dual-lip configuration is standard for rotary shaft applications in gearboxes, differentials, pumps, and agricultural equipment.

Is NBR rubber suitable for my application?

NBR (nitrile) is compatible with petroleum-based oils, mineral greases, hydraulic fluids, and water. It is not recommended for use with phosphate ester fluids, ketones, or strong acids. If your application uses synthetic esters or silicone-based fluids, a FKM (Viton) seal would be more appropriate. For standard automotive, agricultural, and general industrial oil environments, NBR is the most common and cost-effective choice.

Can I use these seals in automotive differentials and transmissions?

Yes. TC double lip NBR seals in the 42–44mm ID range are commonly used as pinion seals, axle shaft seals, and output shaft seals in automotive differentials and manual transmissions. Confirm the exact Inner Ø × Outer Ø × Depth against your vehicle's service manual or the dimensions of the seal being replaced.

How do I install a TC oil seal without damaging it?

Clean the housing bore and shaft thoroughly before installation. Apply a thin film of clean oil or grease to the seal lip and the housing bore. Use a seal driver or a flat block of the correct diameter to press the seal in squarely — never strike the seal directly with a hammer. Press until the seal face is flush with or slightly below the housing surface. Avoid cocking the seal during installation, as this causes immediate lip damage and leakage.

What is the difference between packs of 5 and packs of 10?

Both pack sizes contain identical seals of the same specification. The 5-piece pack suits single-machine repairs or low-volume workshop use. The 10-piece pack offers a lower per-unit cost and is practical for fleet maintenance, agricultural equipment servicing, or keeping a stock of common sizes on hand. Select your preferred quantity in the Packing Quantity (pcs) option before adding to cart.

Are fractional-dimension variants (e.g., 44.45 × 63.5 × 7.874) inch-equivalent sizes?

Yes. Variants with decimal dimensions such as 44.45 × 63.5 × 7.874 are metric conversions of inch-standard sizes (in this case, 1.750" × 2.500" × 0.3125"). These are designed to fit equipment manufactured to inch specifications. Always verify against your OEM part number or measure your existing seal to confirm the correct fit before ordering.

🛒 Select your Inner Ø × Outer Ø × Depth and Packing Quantity above, then add to cart.

Oil Seal 39mm-40mm-41mm ID Rotary Shaft Double Lip R23 TC TTO All Depths NBR

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TC Double Lip NBR Oil Seals for 39–44mm Rotary Shafts — Reliable Shaft Sealing Across All Depths

✅ Key Features of These TC Double Lip Rotary Shaft Oil Seals

📐 Technical Specifications — TC Double Lip Rotary Shaft Oil Seal

❓ Frequently Asked Questions

Oil Seal 39mm-40mm-41mm ID Rotary Shaft Double Lip R23 TC TTO All Depths NBR

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