KOYO Bearings

KOYO bearings 23188RK

Model:23188RK


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 code KOYO 23188RK refers to a specific variant of a large bore tapered roller bearing.

Here is the detailed breakdown:

KOYO Bearing 23188RK

  • 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 nominal bore size.

  • Bore Diameter: The nominal bore size is 440 mm. The "K" suffix is critical to understanding the actual bore type.

  • Suffix: The suffix RK defines the bearing's key features:

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

    • K: This is the crucial feature. The "K" indicates that the bearing has a tapered bore. The bore is not cylindrical; it is ground to a slight taper (usually a 1:12 ratio).


Key Specifications (Approximate Dimensions)

The external dimensions are identical to other bearings in the 23188 series.

DimensionValue (mm)Value (inches)
Bore Diameter (d)440 mm (Tapered)17.3228 in (Tapered)
Outer Diameter (D)720 mm28.3465 in
Width (T)~ 226 mm~ 8.8976 in
Taper1:12 (Standard)
Weight~ 206 kg~ 454 lbs

Crucial Note: The "K" suffix means the bore is tapered. The specified bore diameter (440mm) is a nominal size. The actual diameter will vary along the length of the bore. This bearing requires an adapter or withdrawal sleeve for installation on a straight shaft.


The Significance of the "K" Tapered Bore and Comparison to "RHAK"

The "RK" suffix combination tells us two things: it has a flange (R) and a tapered bore (K). The absence of the "HA" suffix is significant.

  • KOYO 23188RK: Has a flanged outer ring and a tapered bore. The internal components (rollers and cone) are made from standard through-hardened steel.

  • KOYO 23188RHAK: Has a flanged outer ring, a tapered boreand features case-hardened (HA) internal components.

The HA (case-hardening) version is more robust and designed for the most severe applications with high shock loads or potential contamination. The RK version is still extremely heavy-duty but is typically for less severe operating conditions.

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Jinan IUA Bearing Co., LTD

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