50mm ID Metric TC Oil Seal | R23 Double Lip NBR Rotary Shaft Seal

Roll over image to zoom in Click on image to zoom

50mm ID Metric TC Oil Seal | R23 Double Lip NBR Rotary Shaft Seal

HomeDIYer

No reviews

By HomeDIYer®

Size(ID x OD x Height): 50 x 60 x 6mm

Pack Quantity(Pcs): 1

Price:

$7.28 USD

Stock:

In stock (500 units), ready to be shipped

Quantity:

Share this product

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

Quantity Discount Promotion

DIY Expert Support

Get fitment advice & recommendations

Mon-Fri, 8:30AM-8PM

WhatsApp Email

⚡

24-Hour Fast Ship

🚚

Arrives in 3-14 days

🌍

Global Reach

↩️

30-Day Returns

🌱 1 tree planted with every purchase

50mm ID TC Oil Seal — Stop Leaks at the Source with R23 Double-Lip NBR Protection

Shaft seal failures rarely announce themselves — they start as a slow weep of gear oil, a film of grease on a bearing housing, or a streak of fluid down a gearbox casing. For mechanics, equipment technicians, and serious DIYers working on machinery with 50mm shafts, finding the right replacement 50mm ID TC oil seal quickly and confidently is the difference between a one-hour repair and a costly teardown.

Each seal in this listing follows the metric R23 TC (double-lip) standard. The inner diameter is 50mm (≈1.969"), with outer diameters ranging from 60mm to 75mm and heights from 5mm (≈3/16") to 12mm (≈15/32") — select the exact Size (ID × OD × Height) and Pack Quantity that matches your application. The seal body is steel-cased for rigidity, the sealing lips are molded from NBR (nitrile rubber), and a garter spring maintains consistent lip contact pressure throughout the seal's service life.

These rotary shaft seals are commonly used in agricultural gearboxes and PTO shafts, industrial electric motor end caps, automotive differential and transmission housings, and hydraulic pump input shafts — anywhere a 50mm rotating shaft passes through a stationary housing and fluid retention is critical.

🔵 Compatibility Note: Inner diameter is fixed at 50mm. Outer diameter and height vary by variant — verify your housing bore and groove depth before ordering. Standard metric R23 / TC designation; cross-references DIN 3760 Type AS.

✅ Key Features of These 50mm TC Oil Seals

🔩R23 Double-Lip (TC) Design — Primary sealing lip retains lubricant; secondary dust lip blocks contaminants, giving this double-lip rotary shaft seal an edge over single-lip alternatives in dirty or wet environments.
🧲Garter Spring-Loaded Lip — An internal garter spring maintains consistent radial load on the shaft, compensating for minor shaft runout and lip wear over time without manual adjustment.
🛡️NBR Rubber Compound — Nitrile rubber is compatible with petroleum-based oils, gear lubricants, greases, and water, making these seals suitable for most metric gearbox oil seal replacement applications.
🏗️Steel Outer Case — The rigid steel shell provides a firm interference fit in the housing bore, resisting blowout under normal operating pressures and simplifying installation with a seal driver.
📐Wide Size Matrix — OD options from 60mm to 75mm and heights from 5mm to 12mm cover a broad range of housing configurations, reducing the need to source from multiple suppliers for a 50mm shaft seal replacement.
🌡️Broad Operating Temperature Range — NBR seals generally perform across approximately −40°F to +250°F (−40°C to +120°C), suitable for most ambient and moderate-heat machinery environments.

📐 Technical Specifications — 50mm ID TC Rotary Shaft Oil Seal

Seal Type	TC (R23) — Double Lip with Garter Spring
Inner Diameter (ID)	50mm (≈1.969")
Outer Diameter (OD)	60mm – 75mm (≈2.362" – 2.953") — see variant options
Height (Width / Thickness)	5mm – 12mm (≈3/16" – 15/32") — see variant options
Lip Material	NBR (Nitrile Butadiene Rubber)
Case Material	Steel (metal-cased)
Spring Type	Garter spring (internal)
Lip Configuration	Double lip (primary sealing lip + secondary dust lip)
Standard / Cross-Reference	Metric R23 / TC; DIN 3760 Type AS
Operating Temperature	Typically −40°C to +120°C (−40°F to +250°F)
Max. Shaft Speed	Contact us to confirm for your specific OD/height combination
Max. Pressure	Typically ≤ 0.3 bar (4 psi) differential
Fluid Compatibility	Petroleum oils, gear lubricants, greases, water
Pack Quantity	1 / 2 / 3 / 5 / 10 pcs — see variant options
Country of Origin	See variant options / Contact us to confirm

⚠️ Before ordering: Measure your existing seal or housing bore for OD and groove depth for height. Do not rely solely on shaft diameter — OD and height must also match your housing.

❓ Frequently Asked Questions

How do I choose the right height (width) for my 50mm TC oil seal?

Match the seal height to the groove depth in your housing. Available heights in this listing range from 5mm (≈3/16") to 12mm (≈15/32"). Measure your existing seal or housing bore depth before ordering. When in doubt, the most common heights for 50mm ID shafts are typically 7mm–10mm.

What does the TC lip arrangement mean?

TC (also written as R23) refers to a double-lip design: a primary sealing lip that contacts the shaft and a secondary dust-exclusion lip. This arrangement generally provides better contamination resistance than single-lip (SC/R21) seals, making it a common choice for agricultural and industrial gearbox oil seal replacements.

How much pressure can these oil seals handle?

TC-type rotary shaft seals are designed for low-pressure dynamic sealing, typically up to about 0.3 bar (4 psi) of differential pressure. They are not intended for high-pressure hydraulic applications. For higher pressures, a PTFE-lipped or cassette seal is generally recommended.

Can these seals be used outdoors or in wet environments?

Yes. NBR (nitrile rubber) generally offers good resistance to water, petroleum-based oils, and greases. The secondary dust lip on TC seals also helps exclude mud and moisture. For prolonged exposure to ozone, UV, or synthetic esters, an FKM (Viton) seal is typically a better choice.

What shaft standard do these seals fit — and does thread pitch matter?

These are metric seals with a 50mm inner diameter (ID). They fit any round shaft with a 50mm nominal diameter, regardless of thread standard. The outer diameter (OD) must match your housing bore — options in this listing range from 60mm to 75mm OD. Thread pitch is not relevant for oil seals.

How do I install a TC oil seal correctly?

Clean the housing bore and shaft. Lightly lubricate the seal lips with the fluid being sealed. Press the seal in squarely using a seal driver or a flat block — never hammer directly on the seal face. The open (spring) side generally faces inward toward the fluid. Avoid nicking the lip on shaft keyways or splines during installation.

Which OD should I choose if my housing bore is between two listed sizes?

The OD must match your housing bore exactly for a proper interference fit. If your bore falls between listed sizes, contact us to confirm — using an undersized OD will cause leaks, and an oversized OD will not seat properly.

Are these seals compatible with synthetic gear oils or ATF?

NBR is generally compatible with mineral-based gear oils and many ATF formulations. Compatibility with fully synthetic PAO or ester-based oils varies — in most cases NBR performs adequately, but for long-term exposure to aggressive synthetics, an FKM seal is typically preferred. Contact us to confirm for your specific fluid.

🛒 Select your size and quantity above, then add to cart — ships from our US warehouse.

50mm ID Metric TC Oil Seal | R23 Double Lip NBR Rotary Shaft Seal

Payment & Security

Let customers speak for us

DIY Expert Support

Description

50mm ID TC Oil Seal — Stop Leaks at the Source with R23 Double-Lip NBR Protection

✅ Key Features of These 50mm TC Oil Seals

📐 Technical Specifications — 50mm ID TC Rotary Shaft Oil Seal

❓ Frequently Asked Questions

50mm ID Metric TC Oil Seal | R23 Double Lip NBR Rotary Shaft Seal

You may also like

Recently viewed