TC Oil Seal 50mm ID | NBR Double Lip Rotary Shaft Seal | OD 56–64mm
TC Oil Seal 50mm ID | NBR Double Lip Rotary Shaft Seal | OD 56–64mm
TC Oil Seal 50mm ID | NBR Double Lip Rotary Shaft Seal | OD 56–64mm
TC Oil Seal 50mm ID | NBR Double Lip Rotary Shaft Seal | OD 56–64mm
TC Oil Seal 50mm ID | NBR Double Lip Rotary Shaft Seal | OD 56–64mm
TC Oil Seal 50mm ID | NBR Double Lip Rotary Shaft Seal | OD 56–64mm
TC Oil Seal 50mm ID | NBR Double Lip Rotary Shaft Seal | OD 56–64mm
TC Oil Seal 50mm ID | NBR Double Lip Rotary Shaft Seal | OD 56–64mm
TC Oil Seal 50mm ID | NBR Double Lip Rotary Shaft Seal | OD 56–64mm
TC Oil Seal 50mm ID | NBR Double Lip Rotary Shaft Seal | OD 56–64mm
TC Oil Seal 50mm ID | NBR Double Lip Rotary Shaft Seal | OD 56–64mm
TC Oil Seal 50mm ID | NBR Double Lip Rotary Shaft Seal | OD 56–64mm
TC Oil Seal 50mm ID | NBR Double Lip Rotary Shaft Seal | OD 56–64mm
TC Oil Seal 50mm ID | NBR Double Lip Rotary Shaft Seal | OD 56–64mm
TC Oil Seal 50mm ID | NBR Double Lip Rotary Shaft Seal | OD 56–64mm
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TC Oil Seal 50mm ID | NBR Double Lip Rotary Shaft Seal | OD 56–64mm

HomeDIYer
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By HomeDIYer®

Price:
$6.70 USD
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In stock (500 units), ready to be shipped

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Description

TC Oil Seal 50mm ID — Stop Leaks with a Reliable NBR Double Lip Rotary Shaft Seal

When a worn or mismatched shaft seal lets oil creep past the housing, the result is messy, costly, and potentially damaging to bearings and adjacent components. Mechanics, equipment technicians, and serious DIYers who work on gearboxes, pumps, motors, and agricultural machinery need a TC oil seal that seats cleanly, holds under rotation, and keeps contaminants out — not just for a season, but for the long haul.

Each seal in this listing features a 50mm inner diameter (≈1.97") and is available in 23 outer diameter and thickness combinations ranging from 50×56×7mm to 50×64×10mm, covering a wide range of housing bores from 56mm (≈2.20") to 64mm (≈2.52") and thicknesses from 4mm (≈0.16") to 12mm (≈0.47"). The body is molded from black NBR (nitrile butadiene rubber) bonded to a steel spring-loaded inner case. Quantity options run from 1 to 50 pieces per order, so you can grab a single replacement or stock up for fleet maintenance.

These double lip rotary shaft seals are well suited for industrial gearbox rebuilds where gear oil retention is critical, agricultural equipment axle and PTO shaft service where mud and moisture are constant threats, and electric motor or pump overhauls where a clean bore seal prevents lubricant migration into windings or impeller chambers.

ⓘ Compatibility Note: All seals in this listing share a 50mm inner diameter. Before ordering, confirm your housing bore (OD) and depth (T) using the Size (ID×OD×T) selector above. If your shaft or housing dimensions fall outside the listed options, contact us to confirm the correct fit.
⚠ Verify before installing: NBR is compatible with petroleum-based oils and most hydraulic fluids. It is not recommended for brake fluid, phosphate-ester fluids, or ketone-based solvents. For high-temperature applications above 250°F (120°C), please contact us to confirm suitability.

✅ Key Features of These TC Oil Seals

  • 🔥NBR Rubber Construction — Nitrile butadiene rubber resists petroleum-based oils, gear lubricants, and water across a typical service range of -40°F to +250°F (-40°C to +120°C), making it a dependable choice for rotary shaft seal applications in machinery and vehicles.
  • 🔒Double Lip TC Design — The primary sealing lip retains lubricant inside the housing while the secondary dust lip faces outward to block dirt, moisture, and debris — a dual-barrier approach that outperforms single-lip seals in contaminated environments.
  • ⚙Spring-Loaded Sealing Lip — An internal garter spring maintains consistent radial pressure against the shaft, compensating for minor shaft runout and wear over time to sustain an effective oil seal contact zone.
  • 📏23 Size Options, One ID — With outer diameters from 56mm to 64mm and thicknesses from 4mm to 12mm, this listing covers a broad range of housing bores for a 50mm shaft — reducing the need to source seals from multiple suppliers for a single rebuild job.
  • 📦Flexible Quantity Ordering — Available in packs of 1, 2, 3, 5, 10, 15, 20, 25, 30, or 50 pieces. Order a single seal for a one-off repair or buy in bulk for fleet service, workshop stock, or resale without paying inflated per-unit prices.
  • 🔧Straightforward Press-Fit Installation — The steel-reinforced outer case is designed for a firm interference fit into standard machined bores. No adhesive or special tooling is required beyond a seal driver or flat press block, keeping installation time short on gearbox and pump rebuilds.

📐 Technical Specifications — TC Oil Seal (NBR Double Lip)

Product Type TC Oil Seal (Double Lip Rotary Shaft Seal)
Inner Diameter (ID) 50mm (≈1.97") — all variants
Outer Diameter (OD) 56mm – 64mm (≈2.20" – 2.52") — see variant options
Thickness (T) 4mm – 12mm (≈0.16" – 0.47") — see variant options
Material NBR (Nitrile Butadiene Rubber), Black
Seal Design TC Double Lip with garter spring
Case Material Steel-reinforced inner case
Operating Temperature Typically -40°F to +250°F (-40°C to +120°C)
Fluid Compatibility Petroleum oils, gear oil, hydraulic fluid, grease, water — contact us to confirm for other fluids
Quantity per Order 1 / 2 / 3 / 5 / 10 / 15 / 20 / 25 / 30 / 50 PCS — see variant options
Color Black
Shaft Speed Contact us to confirm for your application
Installation Method Press-fit into housing bore
Country of Origin Contact us to confirm

❓ Frequently Asked Questions

How do I choose the right TC oil seal size?

Measure three dimensions: shaft diameter (ID), housing bore diameter (OD), and housing depth (T). All seals in this listing share a 50mm inner diameter. Select the OD and thickness that match your housing. For example, 50×60×7mm means ID=50mm (≈1.97"), OD=60mm (≈2.36"), thickness=7mm (≈0.28"). When in doubt, measure twice before ordering — a seal that is even 1mm too large in OD will not seat correctly.

What is a TC oil seal and how does the double lip design work?

A TC oil seal is a rotary shaft seal with two sealing lips. The primary lip faces inward and retains lubricant inside the housing; the secondary dust lip faces outward to block contaminants such as dirt, water, and debris. This double-barrier design generally provides better protection than single-lip seals in environments with contamination or moisture exposure.

What is the temperature and pressure range for these NBR seals?

NBR (nitrile) rubber typically handles temperatures from approximately -40°F to +250°F (-40°C to +120°C). These seals are suited for low-to-moderate pressure rotary shaft applications. For high-temperature environments above 250°F or high-pressure systems, contact us to confirm suitability before ordering.

Can these oil seals be used outdoors or in wet conditions?

NBR is generally resistant to water, petroleum-based oils, and mild chemicals, making it suitable for outdoor and wet environments in most cases. However, NBR is not recommended for prolonged exposure to ozone, strong UV radiation, or aromatic solvents. For harsh outdoor applications — such as agricultural equipment operating in muddy or submerged conditions — the secondary dust lip provides an added layer of protection.

What fluids are these seals compatible with?

NBR seals are generally compatible with: petroleum-based engine and gear oils, hydraulic fluids (mineral-based), grease, water, and diesel fuel. They are not recommended for brake fluid (DOT 3/4/5), phosphate-ester hydraulic fluids, ketone-based solvents, or aromatic hydrocarbons. If your application involves an unusual fluid, contact us to confirm compatibility before installation.

How do I install a TC oil seal correctly?

Follow these steps for a clean installation:

  • Clean the housing bore and shaft journal thoroughly.
  • Lightly lubricate the seal lip with the fluid it will retain.
  • Align the seal squarely with the bore — the primary lip should face the fluid side.
  • Press the seal in evenly using a seal driver or flat block. Never hammer directly on the seal face or lip.
  • Seat the seal flush with or slightly below the housing face, per your equipment's specification.
Which equipment types commonly use a 50mm ID TC oil seal?

A 50mm inner diameter TC seal is commonly found in: agricultural equipment (tractors, combines, PTO shafts), industrial gearboxes and reducers, electric motors and generators, centrifugal pumps, axle and differential assemblies, and general industrial machinery. The specific OD and thickness you need will depend on your equipment's housing dimensions — check your service manual or measure the existing seal.

🛒 Select your size (ID×OD×T) and quantity above, then add to cart — ships from our US warehouse.

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