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Koyo NK55/25A Needle Roller Bearing, Outer Ring and Roller, Open, Oil Hole, Steel Cage, Metric, 55mm ID, 68mm OD, 25mm Width, 7800rpm Maximum Rotational Speed
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Koyo NK55/25A Needle Roller Bearing, Outer Ring and Roller, Open, Oil Hole, Steel Cage, Metric, 55mm ID, 68mm OD, 25mm Width, 7800rpm Maximum Rotational Speed
High load-carrying capacity with a reduced cross-section for use in restricted spaces.
Koyo NK55/25A Needle Roller Bearing, Outer Ring and Roller, Open, Oil Hole, Steel Cage, Metric, 55mm ID, 68mm OD, 25mm Width, 7800rpm Maximum Rotational Speed
Item #: 112772392

Koyo NK55/25A Needle Roller Bearing, Outer Ring and Roller, Open, Oil Hole, Steel Cage, Metric, 55mm ID, 68mm OD, 25mm Width, 7800rpm Maximum

Item #: 112772392

XCD 140

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High load-carrying capacity with a reduced cross-section for use in restricted spaces.
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What Stands Out

High RPM Rating
With a maximum rotational speed of 7800rpm, this bearing ensures smooth operation and high efficiency, making it ideal for high-speed applications.
Robust Construction
Featuring a steel cage and oil hole design, the Koyo NK55/25A guarantees durability and efficient lubrication, resulting in a longer lifespan even under heavy loads.
Metric Precision
This needle roller bearing is meticulously engineered in metric dimensions, providing precise fit and compatibility for a wide range of industrial applications.

Product Details

Shop Koyo NK55/25A Needle Roller Bearing, Outer Ring and Roller, Open, Oil Hole, Steel Cage, Metric, 55mm ID, 68mm OD, 25mm Width, 7800rpm Maximum Rotational Speed online at a best price in Montserrat. B007EE0Z0A
Brand NameKoyo
Bearing NumberNK55/25A
Bearing TypeRoller Bearing
UPC605790187957
Global Trade Identification Number00605790187957
Part NumberNK55/25A
ManufacturerKoyo Torrington
ModelNK55/25A
Unit Count1 Count
Included Componentsbearing
Item Dimensions2.68 x 2.68 x 0.98 inches (6.8 x 6.8 x 2.5 cm)
Item Weight6.4 ounces (181.44 grams)
Material TypeAlloy Steel
Compatible LubricantOil
Specification MetISO 1206
BrandKoyo
MaterialAlloy Steel
Item dimensions L x W x H2.68 x 2.68 x 0.98 inches (6.8 x 6.8 x 2.5 cm)

Who Should Buy?

Suitable For
  • Manufacturing Equipment

    Ideal for machinery requiring high-speed and precision, ensuring smooth operation in industrial settings.

  • Automotive Applications

    Suitable for various automotive parts that depend on high performance and reliability, enhancing vehicle efficiency.

  • DIY Projects

    Great for hobbyists looking to build or repair devices needing durable components and precise movement.

Not Suitable For
  • Heavy Load Applications

    Not suitable for applications involving heavy weights, which may exceed the bearing's load capacity.

Product Description

Koyo NK55/25A Needle Roller Bearing, Outer Ring and Roller, Open, Oil Hole, Steel Cage, Metric, 55mm ID, 68mm OD, 25mm Width, 7800rpm Maximum Rotational Speed

Have any Query? Chat with us

Customer Questions & Answers

  • Question: What are the key specifications of the Koyo NK55/25A Needle Roller Bearing?

    Answer: The Koyo NK55/25A Needle Roller Bearing features a 55mm inner diameter, 68mm outer diameter, and a width of 25mm. It operates effectively at a maximum speed of 7800rpm and includes an open design with an oil hole for easy lubrication. This bearing is crafted with a steel cage, enhancing its durability and load-carrying capacity. These specifications make it an ideal choice for various industrial applications such as in motors, gearboxes, and conveyor systems where precision and reliability are crucial.
  • Question: What are the advantages of using a needle roller bearing?

    Answer: Needle roller bearings, like the Koyo NK55/25A, offer several advantages including a high load-bearing capacity and compact design. The design utilizes slender rollers, which help reduce friction and wear while maximizing surface contact area. This optimization results in improved efficiency in rotating applications. These bearings are particularly beneficial in automotive and machinery sectors where space constraints are a concern, allowing for smoother operations and longer life cycles.
  • Question: In which applications can I use the Koyo NK55/25A Bearing?

    Answer: The Koyo NK55/25A Needle Roller Bearing is versatile and suitable for various applications including automotive engines, transmission systems, and heavy machinery. Its design supports high-speed rotation and load duties, making it perfect for gearboxes and conveyors. Additionally, its open structure allows for superior lubrication management, ensuring seamless operation in setups that require continuous motion such as robotics and industrial automation equipment.
  • Question: How does lubrication work in the Koyo NK55/25A bearing?

    Answer: Lubrication in the Koyo NK55/25A is facilitated by its open design and integrated oil hole, which allows for direct access to the bearing internals. This feature promotes optimal grease or oil application, reducing friction and wear during operation. Regular lubrication can significantly extend the bearing's lifespan while maintaining its performance, making it especially important in high-speed applications where heat generation is a concern.
  • Question: What is the maximum load capacity of the Koyo NK55/25A bearing?

    Answer: The Koyo NK55/25A Needle Roller Bearing can handle substantial radial loads, thanks to its robust construction and the use of needle rollers which distribute the load more efficiently. While the exact load capacity varies based on specific installation and application conditions, this bearing typically supports higher loads when compared to ball bearings of the same size. It’s ideal for applications where both speed and load capacity are critical, such as in manufacturing and heavy machinery.
  • Question: Is the Koyo NK55/25A bearing suitable for high-speed applications?

    Answer: Yes, the Koyo NK55/25A is specifically designed for high-speed applications, with a maximum speed rating of 7800rpm. Its needle roller design minimizes friction, allowing for smoother operation at elevated speeds. This feature makes it an excellent choice for machinery that requires rapid component rotation, such as in electric motors, textile machines, and precision equipment, where maintaining high RPM is essential for performance.
  • Question: What materials are used in the Koyo NK55/25A bearing?

    Answer: The Koyo NK55/25A Needle Roller Bearing is constructed from high-quality steel, known for its strength and resistance to wear. The steel cage not only adds structural integrity but also allows optimal roller spacing. The use of steel materials enhances the bearing's overall performance in demanding environments, making it suitable for heavy-duty applications where durability is paramount.
  • Question: Can I use the Koyo NK55/25A in outdoor environments?

    Answer: While the Koyo NK55/25A is built for durability, it's essential to consider its environment. If used outdoors, ensure that it’s protected from harsh conditions such as moisture, dirt, and extreme temperatures, which can affect its performance. Employing proper sealing or protective measures may be necessary to extend its lifespan in outdoor applications typically found in agricultural machinery or construction equipment.
  • Question: What distinguishes the Koyo NK55/25A from other types of roller bearings?

    Answer: The Koyo NK55/25A distinguishes itself from other roller bearings through its unique needle roller configuration, providing a massive load-carrying capacity in a compact structure. This contrasts sharply with traditional ball bearings which often require more space to accommodate similar loads. The Koyo NK55/25A is particularly beneficial in applications where space is limited but high performance is essential, such as compact engines or slim profile machinery.
  • Question: Where can I buy the Koyo NK55/25A Needle Roller Bearing?

    Answer: You can buy the Koyo NK55/25A Needle Roller Bearing on Ubuy, which is a leading e-commerce platform available in Montserrat. Ubuy offers a wide range of products, along with competitive pricing and reliable service, catering to your bearing needs.

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Pros

  • High precision performance
  • Durable steel construction
  • Excellent load capacity
  • Smooth operation at high speeds
  • Versatile for various applications

Cons

  • Installation may be slightly tricky.

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XCD 140

Order now and get it around Monday, September 14

QTY:

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PCI DSS compliant and ISO 27001:2022 certified, with encrypted payments and full buyer protection on every order.

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Features & Benefits

  • Designed for high dynamic and static loads.
  • Reduced cross-section allows for installation in tight spaces.
  • Steel cage ensures guided and evenly spaced rollers.
  • Minimizes vibration and noise, ideal for high-speed operations.
  • Constructed from durable, heat-tolerant materials.
  • Includes lubrication groove and oil hole for easy maintenance.

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