KOYO Bearings

KOYO bearings 23188RHA

Model:23188RHA


Dimensions(mm):440x720x226mm


Email:skfnskoyo@gmail.com


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Description

200rr-koyo
Japan’s koyo  bearing
 company produces tens of thousands of high-precision and high-quality Koyo bearing series products), providing information about aerospace technology, computer components, motors, high-speed trains, MRT trains, industrial machinery, CNC lathes, high-precision machining machines, automobile, locomotive industry, steel industry And other important components to make the best choice.

Of course. The bearing code KOYO 23188RHA provides specific details about its size, type, and design features.

Here is a detailed breakdown:

KOYO Bearing 23188RHA

  • Manufacturer: KOYO (A major Japanese bearing manufacturer, now part of JTEKT Corporation).

  • Type: Tapered Roller Bearing. Designed to handle heavy combined radial and axial loads.

  • Series: The prefix 23188 defines the bore size and external dimensions.

    • The "2" signifies a metric tapered roller bearing.

    • The "3" indicates a wide contact angle, optimized for heavy axial loads.

    • The number "188" specifies the bore size.

  • Bore Diameter: The bore size (inner diameter) for this bearing is 440 mm. This is calculated from the last two digits of the basic number ("88") using a standard formula for large bore bearings.

  • Suffix: The suffix RHA is crucial and defines specific features:

    • R: Indicates a flanged outer ring (cup). The flange acts as a shoulder, making axial location and installation into the housing much simpler and more secure.

    • HA: Signifies that the rollers and cone (inner ring) are made from case-hardened steel. This process creates a very hard, wear-resistant outer surface while maintaining a tougher, more shock-resistant core. This is essential for bearings handling heavy loads, shock loads, and contamination in demanding applications.


Key Specifications (Approximate Dimensions)

DimensionValue (mm)Value (inches)
Bore Diameter (d)440 mm17.3228 in
Outer Diameter (D)720 mm28.3465 in
Width (T)~ 226 mm~ 8.8976 in
Weight~ 206 kg~ 454 lbs

Important Note: Always refer to the official KOYO/JTEKT engineering catalog for precise dimensions, exact load ratings (Dynamic & Static), and tolerances before design and installation.

Comparison: 23188R vs. 23188RHA

This is a key distinction. While both bearings share the same physical dimensions:

  • KOYO 23188R: Has a flanged outer ring (R). The internal components are made from standard through-hardened steel.

  • KOYO 23188RHA: Has a flanged outer ring (Rand features case-hardened internal components (HA).

The HA suffix makes the 23188RHA version more robust and suitable for the most severe applications with high shock loads or potential contamination.

Common Applications

Due to its large size, flange, and case-hardened construction, the 23188RHA is used in extremely heavy-duty, severe applications:

  • Mining Equipment: Crushers, rotary drills, draglines, and large shovel booms.

  • Construction Machinery: Large excavators, bulldozers, and wheel loaders.

  • Material Handling: Slewing rings for large cranes.

  • Industrial Gearboxes: In very large, heavy-duty power transmission units.

  • Paper Mill Machinery: Large rollers and drums.

How to Find More Information or a Replacement

  1. Cross-Reference: This bearing can be cross-referenced with other brands that use the same suffix system, such as Timken 23188RHA.

  2. Search Online: Use the full part number "23188RHA" in your search on industrial supplier websites (like Motion Industries, Bearings Inc., etc.).

  3. Consult a Catalog: For critical technical data, always look up the part number in the official KOYO Tapered Roller Bearing catalog. This will provide exact load capacities and life calculations.

In summary, the KOYO 23188RHA is a large-bore, heavy-duty, metric tapered roller bearing with a flanged outer ring and case-hardened internal components, designed for the most severe and demanding industrial environments.

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