Thrust Needle Roller Bearing

How to choose Rolling Bearings

Points to check when selecting, with the values for this product (Thrust Needle Roller Bearing).

1. 1. Main dimensions matching shaft diameter and housing

   The bore diameter d is determined by the shaft diameter, while the outside diameter D and width B are determined by the housing bore diameter and mounting space. Main dimensions are standardized under JIS/ISO series, which makes replacement with interchangeable products easier. For tapered roller bearings, also check the assembled width T and outer ring width C; for thrust bearings, also check the height H.

2. 2. Check dynamic load rating against required life

   The basic dynamic load rating Cr is the reference value for calculating rolling fatigue life during rotation. Calculate the rated life from the actual applied load and rotational speed, and confirm that the required life is met. Roller bearings have a larger Cr than ball bearings of the same dimensions and are suited to heavy loads.

3. 3. Check static load rating for stationary or shock loads

   In applications involving low-speed rotation, oscillation, or shock loads while stopped, permanent deformation (indentations) may remain on the raceway surfaces. Therefore, check the safety factor using the ratio of the basic static load rating C0r to the maximum load.

4. 4. Combination of rotational speed and lubrication method

   The limiting speed differs between grease lubrication and oil lubrication. Confirm that the operating speed has sufficient margin using the value for the lubrication method adopted. At higher speeds, the cage material, guide method, and accuracy grade also affect rotational performance.

5. 5. Handling load direction and shaft misalignment

   If axial loads (loads in the shaft direction) are also applied, check the contact angle of angular contact ball bearings or tapered roller bearings. The larger the contact angle, the greater the capacity to accept axial loads. If the shaft deflects or there are mounting errors, check the permissible misalignment angle of self-aligning types.

6. 6. Materials for high-temperature, vacuum, and corrosive environments

   In high-temperature, vacuum, or chemical-exposed environments, common combinations of steel and grease may not be usable. Therefore, confirm the operating temperature range and atmospheric pressure, then select the rolling element material and cage material accordingly. Options include ceramics, stainless steel, solid lubricants, and fluorine grease.

This guide was written by AI based on the listed products' documents and specification items.

About Rolling Bearings and all products

Description

Available in separated and non-separated types, it supports axial load in one direction. Its extremely small mounting space makes it suitable for applications such as crane hooks and oil drilling machine swivels.

FAQ

Q. What kind of load can thrust needle roller bearings (AXK, FNT, NTA, etc.) support?

A. They support axial load in one direction. They are bearings with high axial load capacity and high axial rigidity.

Q. Can thrust needle roller bearings (AXK, FNT, NTA, etc.) be used where mounting space is limited?

A. Because they are thin-section and have an extremely small mounting space, they can be installed in locations with space constraints.

Q. What types of thrust needle roller bearings (AXK, FNT, NTA, etc.) are available?

A. They are available in separated and non-separated types.

Q. What applications are thrust needle roller bearings (AXK, FNT, NTA, etc.) used for?

A. They are used in crane hooks, oil drilling machine swivels, rolling mill roll necks, and similar applications.

Written by AI based on the content of the source documents.

Source documents

• Catalog 転がり軸受 総合カタログ Open page 12
  Found on: https://koyo.jtekt.co.jp/products/exsev/