KOYO Bearings

KOYO bearings 23168RK

Model:23168RK


Dimensions(mm):340x580x190


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. Here is a detailed parameter introduction for the KOYO 23168RK bearing.

Quick Summary

The KOYO 23168RK is a Spherical Roller Bearing with a tapered bore designed for mounting using an adapter sleeve. The "RK" suffix indicates a specific internal design and the inclusion of mounting hardware. It is engineered to handle extremely heavy radial loads and moderate axial loads while compensating for shaft misalignment, making it a fundamental component in heavy industrial machinery.

The core difference from the "RHAK" variant is the internal design and cage material, making the "RK" a robust, standard-duty option.


Detailed Parameter Breakdown

The core dimensions (bore, OD, width) are identical to other 23168 bearings. The differences are internal and related to mounting.

ParameterValueDescription
Bearing Type
Spherical Roller Bearing with Tapered Bore & Adapter Sleeve
Shaft Diameter (d)340 mmThis is the nominal bore size. The actual shaft size will be smaller.
Outside Diameter (D)580 mmThe outer diameter of the bearing.
Width (B)190 mmThe total width of the bearing.
Dynamic Load Rating (C)~3,100 kNThe load capacity. Typically slightly lower than the RHA design.
Static Load Rating (C₀)~5,900 kNThe maximum stationary load. Typically slightly lower than the RHA design.
Grease Limit Speed~560 rpmMaximum speed with grease lubrication.
Oil Limit Speed~700 rpmMaximum speed with oil lubrication.
Adapter SleeveH 2368The designated adapter sleeve required for mounting.
Shaft Size Range (with sleeve)~320 - 330 mmThe actual diameter of the straight shaft to be machined (must be confirmed via H 2368 sleeve tables).
Weight~195 kgApproximate total weight (bearing + sleeve + nut + washer).

Note: Load and speed ratings are approximate. Always consult the specific product catalog for exact values.


Suffix Code Explanation (RK)

This is the most important part for understanding this specific bearing. The suffixes have evolved over time.

  • R: Tapered Bore. This indicates the inner ring has a tapered bore (usually a 1:12 taper) for mounting with an adapter sleeve.

  • K: Adapter Sleeve Mounting. This signifies the bearing is supplied for use with an adapter sleeve. It often implies the bearing comes as a set, including the locking nut and locking washer.

Critical Interpretation of the Missing Suffixes:
The absence of an "H" or "A" in the suffix code is highly significant.

  • No 'H': This strongly suggests the cage is not a hardened steel cage. It is most likely a pressed steel cage or a machined brass cage. This makes the bearing less suitable for extremely high-vibration or shock-load applications compared to an "H" type bearing.

  • No 'A': This indicates the bearing likely features an older, symmetric roller design. While still very robust, symmetric rollers generally have a lower load capacity and higher friction than the modern asymmetric ("A" suffix) design.

In summary: 23168RK = A robust, standard-duty spherical roller bearing with a tapered bore and adapter sleeve, likely featuring a pressed steel cage and symmetric rollers.


Key Features and Applications

Features:

  1. Tapered Bore & Sleeve Mounting: Allows for easy installation and removal on straight shafts and enables precise adjustment of the internal clearance.

  2. Self-Alignment: Compensates for misalignment caused by shaft deflection or mounting errors.

  3. High Load Capacity: Excellent for heavy radial loads, though marginally less than the modern RHA design.

  4. Cost-Effectiveness: Often a more economical choice than the premium RHAK version for applications where the highest load capacity and extreme robustness are not absolutely critical.

Typical Applications:
This bearing is found in a wide range of heavy-duty equipment, including:

  • Industrial Gearboxes

  • Conveyor Drive Pulleys

  • Large Fans and Blowers

  • Pumps

  • Crushers

  • Paper Mill Machinery

Comparison: 23168RK vs. 23168RHAK

Feature23168RK23168RHAK
Internal DesignLikely Symmetric RollersAsymmetric Rollers (A)
Cage MaterialPressed Steel / BrassHardened Steel (H)
Load CapacityStandard / HighHigher / Premium
RobustnessGood for most applicationsSuperior for shock/vibration
Typical Use CaseGeneral heavy-duty industryExtreme-duty, critical applications

Installation Note

Like other "K" versions, mounting the 23168RK requires:

  1. A correctly machined straight shaft to the dimensions specified for the H 2368 adapter sleeve.

  2. Proper tightening of the locking nut to achieve the correct interference fit and internal clearance.


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