MTZ Sealing Ring 50×70×10 mm

 The 50×70×10 mm MTZ sealing ring is a practical replacement seal designed for use in the front crankshaft cover area of MTZ tractors. It is a small but important part that helps prevent oil leakage and protects the engine assembly from dirt and contamination.

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Key Specifications

• Product Name: Sealing Ring 50×70×10 mm
• Application: MTZ crankshaft front cover
• Size: 50×70×10 mm
• Alternative Codes: 50X70X10, S50/70/10, S507010
• Barcodes: 5900613203353, 540000012319
• Product Weight: 0.062 kg

Build & Design

The seal has a black rubber outer body with a circular lip design, typical of rotary shaft oil seals. Its purpose is to sit tightly in the housing and seal around the rotating crankshaft surface.

The rubber construction allows the seal to maintain contact pressure while absorbing minor vibration and movement during engine operation.

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Performance

When correctly installed, this sealing ring helps:

• Prevent oil leakage from the crankshaft front cover
• Keep dust and dirt out of the engine area
• Maintain proper lubrication inside the assembly
• Protect nearby engine components from contamination

A worn or hardened seal can cause oil seepage, so replacement is important during engine maintenance.

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Compatibility & Installation

This part is listed for MTZ crankshaft front cover applications. Installation should be done carefully to avoid damaging the sealing lip. The shaft and housing surfaces should be clean and smooth before fitting.

One important note: the listing states “outer diameter 50 mm, inner diameter 70 mm,” which appears inconsistent for a 50×70×10 seal. Usually, this format means 50 mm inner diameter, 70 mm outer diameter, and 10 mm thickness. The dimensions should be confirmed before purchase.

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Value for Money

This is a low-weight, essential maintenance part. Even though it is small, replacing a worn seal can prevent oil loss and avoid more expensive repairs later.

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Pros

• Standard 50×70×10 seal size
• Suitable for the MTZ crankshaft front cover use
• Helps prevent oil leakage
• Lightweight and simple to replace
• Multiple reference codes provided

Cons

• Correct installation is important to avoid leakage

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Final Verdict

The MTZ 50×70×10 mm sealing ring is a simple but important engine seal for maintaining oil-tightness around the crankshaft front cover. It is a practical replacement part for MTZ maintenance, but the listed dimensions should be verified before ordering due to the apparent inner/outer diameter mismatch.

O-Ring 140×3.5 mm NBR 70 Shore A Black (ORS1060)

 The ORS1060 O-ring 140×3.5 mm is a high-quality sealing ring made from NBR nitrile rubber, designed for industrial, hydraulic, pneumatic, and general mechanical sealing applications. With its strong oil and grease resistance, it is a practical choice for systems exposed to mineral oils, hydraulic fluids, fuels, and lubricants.

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Key Specifications

• Product Name: O-ring 140×3.5 (140x3,5) Nitrile NBR
• Item No.: ORS1060
• Article Number: 1060
• EAN: 6150545376383
• Material: NBR / Nitrile rubber
• Hardness: 70 Shore A
• Colour: Black
• Inner Diameter: 140 mm
• Cross Section: 3.5 mm
• DIN 3771 Size: 140×3.5
• Seal Type: O-ring
• Country of Origin: Vietnam
• Customs Code: 40169300

Material & Build Quality

This O-ring is manufactured from acrylonitrile butadiene rubber (NBR), a commonly used sealing material valued for its resistance to oils and fuels. The 70 Shore A hardness gives it a good balance between flexibility and mechanical strength, making it suitable for static and moderate dynamic sealing tasks.

The black nitrile compound provides good durability while maintaining elasticity under compression.

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Technical Performance

• Temperature Range: -30°C to +135°C
• Tensile Strength: 14.4 MPa
• Ultimate Elongation: 389%
• Compression Set: 11%
• Specific Gravity: 1.28 ± 0.03 g/cm³

These specifications indicate a dependable sealing material with good resistance to deformation, pressure, and mechanical wear.

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Chemical Resistance

This NBR O-ring is suitable for contact with:

• Mineral oils
• Greases
• Hydraulic fluids
• Fuels
• Aliphatic hydrocarbons
• Hydraulic oils H, H-L, and H-LP

This makes it especially useful in machinery where oil sealing is required.

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Applications

The 140×3.5 mm NBR O-ring is suitable for use in:

• Hydraulic cylinders
• Hydraulic pumps
• Pneumatic cylinders
• Air pressure regulators
• Compressors
• Pumps
• General industrial sealing systems

Its large diameter makes it useful for bigger housings, covers, flanges, or hydraulic assemblies.

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Installation & Use

For best performance, the groove dimensions should match the 140×3.5 mm O-ring size. The sealing surface should be clean and smooth, and the ring should be installed without twisting or overstretching. A compatible lubricant can help prevent damage during fitting.

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Value for Money

With strong stock availability and a widely used standard size, this O-ring is a practical maintenance item for workshops and industrial users. Its NBR 70 compound offers dependable performance at a reasonable cost compared with more specialized materials.

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Pros

• Excellent resistance to oils, greases, and fuels
• Standard 140×3.5 mm size
• Durable NBR 70 Shore A material
• Good temperature range
• Suitable for hydraulic and pneumatic systems
• Large stock availability

Cons

• Not ideal for ozone, weathering, or strong UV exposure
• Not suitable for all aggressive chemicals
• Requires correct groove sizing for proper sealing

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Final Verdict

The ORS1060 NBR O-ring 140×3.5 mm is a reliable, oil-resistant sealing solution for industrial and mechanical applications. With its durable nitrile material, 70 Shore A hardness, and strong chemical resistance to oils and hydraulic fluids, it is a solid choice for maintenance, repair, and equipment sealing tasks.

Freudenberg Oil Seal NBR902 BABSL (60×72×7 mm)

 The Freudenberg BABSL oil seal is a high-quality sealing solution designed for rotating shafts, ensuring reliable protection against oil leakage and contamination in mechanical systems.

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Key Specifications

• Brand: Freudenberg
• Type: BABSL (with dust lip)
• Shaft Diameter: 60 mm
• Outer Diameter: 72 mm
• Height: 7 mm
• Material: NBR (Nitrile Rubber)
• Spring Material: Carbon steel
• Max Pressure: 7.5 bar
• Temperature Range: -40°C to +100°C
• Price: €26.90 (incl. VAT)

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Build & Design

This seal features a dual-lip design:

• Main sealing lip for oil retention
• Additional dust lip to prevent dirt ingress

The NBR rubber body provides flexibility and resistance to oils and greases, while the integrated spring ensures consistent sealing pressure.

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Performance

• Prevents oil leakage in rotating systems
• Protects against dust and contaminants
• Performs reliably under moderate pressure and temperature ranges
• Maintains sealing efficiency over time

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Applications

• Gearboxes and transmissions
• Hydraulic and industrial machinery
• Agricultural equipment
• Motors and rotating shafts

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Ease of Installation

• Standard dimensions for easy replacement
• Press-fit installation into housing
• Requires correct alignment and lubrication for optimal performance

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Value for Money

Freudenberg is a premium brand, and while priced higher than generic seals, it offers a long lifespan and dependable sealing, reducing maintenance costs.

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Pros

• Dual-lip design for better protection
• High-quality NBR material
• Wide temperature tolerance
• Reliable under pressure
• Trusted manufacturer

Cons

• Higher price than basic alternatives
• Requires precise installation

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Final Verdict

The Freudenberg BABSL oil seal is a durable and professional-grade component ideal for demanding applications. It delivers excellent sealing performance and protection, making it a solid investment for long-term reliability.

Freudenberg NI 300 U-Ring Rod Seal (80×90×12 mm, 94AU925)

 The Freudenberg NI 300 U-ring rod seal is a high-quality sealing component designed for hydraulic systems, where reliability under pressure and temperature variation is critical. Built from advanced materials, it’s suited for demanding industrial applications.

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Key Specifications

• Manufacturer: Freudenberg Sealing
• Model: NI 300
• Type: U-ring rod seal
• Inner Diameter: 80 mm
• Outer Diameter: 90 mm
• Width: 12 mm
• Installation Length: 13 mm
• Material: 94AU925 polyurethane
• Hardness: 94 Shore
• Temperature Range: -30°C to +110°C
• Price: €29.70 (incl. VAT)

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Build & Material

Made from high-performance polyurethane, this seal offers:

• Excellent wear resistance
• Strong elasticity and sealing capability
• Resistance to hydraulic fluids and pressure

The 94 Shore hardness ensures durability while maintaining flexibility for tight sealing.

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Performance

• Designed for hydraulic rod sealing
• Prevents leakage under high-pressure conditions
• Performs reliably across wide temperature ranges
• Maintains sealing integrity during continuous operation

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Applications

• Hydraulic cylinders
• Industrial machinery
• Construction equipment
• Agricultural systems

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Value for Money

Freudenberg is a premium brand, and while the price is higher than generic seals, it reflects long lifespan and consistent performance, reducing maintenance costs over time.

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Pros

• High-quality polyurethane material
• Excellent sealing performance
• Wide temperature tolerance
• Trusted industrial brand

Cons

• Higher price compared to standard seals
• Requires precise sizing and correct installation

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Final Verdict

The Freudenberg NI 300 U-ring seal is a reliable, professional-grade sealing solution for hydraulic systems. Ideal for users who prioritize durability and performance in demanding environments.