l217849/l217810 - Timken Taper Roller Bearing - 3.5x4.875x0.8125inches (2024)

FAQs

How do I identify my Timken bearings? ›

The TIMKEN pillow block bearings is identified by a plastic or metal tag on the unit. All housed units are factory equipped with this tag. This identification number is the bearing housing assembly number which can be ordered from this catalog (e.g., RAK 1).

The tapered design allows for effective distribution of loads across the bearing, making them ideal for heavy-load applications. Spherical Roller Bearings: These bearings are primarily designed for high radial loads with a moderate level of axial loads.

Timken tapered roller bearing nomenclature

Inch system bearings are normally assigned individual part numbers for the inner ring and for the outer ring, whereas ISO (metric) bearings are assigned a unique part number for the bearing assembly as a whole, which includes both inner and outer ring.

Like most things, choosing a tapered roller bearing also has disadvantages. When misalignment occurs, the results can cause irreversible damage. If you know the cause for misalignment is high, choosing a different option, such as spherical roller bearings, would be a good idea.

How to Check Authenticity. Once you've downloaded the WBA Bearing Authenticator app, simply scan the QR code on the packaging label to get an instant response about the authenticity of the bearing. The app is available worldwide for iOS and Android devices.

Timken wheel bearings are made in the USA, Mexico, and a number of other countries.

Single row tapered roller bearings must be used either with a second bearing (fig. 1) or as a matched pair (Matched tapered roller bearings). The bearings must be adjusted against each other until the requisite clearance or preload is obtained (Selecting preload).

Common bearing failure modes during service mainly include contact fatigue, wear, fretting corrosion, overheating, etc., which usually occur on the surface of raceway and rollers [1], [2], [3].

Single row tapered roller bearings are typically used in applications with combined loads. Single row tapered roller bearings can also be used in sets. Single row tapered roller bearings can be matched face-to-face, back-to-back or in tandem to deliver specific advantages depending on operating conditions.

Timken provides four precision classes, in both metric and inch systems, that cover the full range of precision application requirements. In ascending order of accuracy, they are identified in the metric system as Class C, B, A and AA, while in the inch system as Class 3, 0, 00 and 000.

What does j mean on a bearing? ›

“J” Type: Two piece ribbon consisting of two halves that are assembled one half from one side, and the other half from the opposite side. Fold down tabs secure the two halves. This type of cage is guided by the balls. “Loose” clinch type provides lower torque.

The first digit indicates the width or height series (dimensions B, T or H). The second digit identifies the diameter series (dimension D). The last two digits of the basic designation identify the size code of the bearing bore. The size code multiplied by 5 gives the bore diameter (d) in mm.

In order to ensure correct adjustment, the tapered bearings are required to have “zero end play” at all times.

Class 00 (ABMA), Class A (ISO) and Class P2 (DIN) bearings are precision grade tapered roller bearings designed for higher speed and accuracy applications than standard class bearings.

Tapered roller bearings are capable of carrying both radial and axial loads but largely used for applications where axial load component predominates. They are often used in pairs to take the thrust load in both directions.

The easiest way to determine which bearings are used on your trailer axle is to take the hub off and look for the reference numbers stamped into the metal of both inner and outer bearings. If the bearing numbers are unclear, the next best solution is to take measurements of both bearings. This is the bearing itself.

'6206' is the Basic Designation - Digit Identification of Bearing; 'X1', 'LLB', 'C3', 'P5', 2AS' are the suffixes. For some bearings, they are exclusively identified with numeric codes, devoid of any prefix or suffix, such as the bearing “6206”. Some bearings only have suffixes, such as “6206 LLB C3 P5”.

The first digit indicates the width or height series (dimensions B, T or H). The second digit identifies the diameter series (dimension D). The last two digits of the basic designation identify the size code of the bearing bore. The size code multiplied by 5 gives the bore diameter (d) in mm.

The marking sequence goes from the thinnest to the most massive (7, 8, 9, 0, 1, 2, 3, 4). For instance: bearings 6708 and 6408 have the same diameter of the aperture of the inner circle.