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Double-Row Tapered Roller Bearings (Inward Type) TDI Series

TDI形 / JTEKT Corporation (Official website) / Listed on page 121 of the document

Double-row tapered roller bearings with bore diameters of 100 to 940 mm. They support radial and axial loads simultaneously and are used in an inward-facing combination. Dimensions, basic load ratings, and mounting dimensions are listed for each model number.

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Double-Row Tapered Roller Bearings (Inward Type) TDI Series on page 121 of JTEKT Corporation "JTEKT 大形転がり軸受カタログ（技術解説・軸受寸法表）"
Source: JTEKT Corporation「JTEKT 大形転がり軸受カタログ（技術解説・軸受寸法表）」page 121
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Specifications

Inner diameter d 100 to 939.8 mm
Outer diameter D 165 to 1333.5 mm
Width T 52 to 463.55 mm

How to choose Tapered Roller Bearings

Points to check when selecting, with the values for this product (Double-Row Tapered Roller Bearings (Inward Type) TDI Series).

  1. 1. Dimension series matching shaft and housing

    This product: Inner diameter d 100 to 939.8 mm

    Bore d matches the shaft diameter and outside diameter D matches the housing bore. Tapered roller bearings come in metric and inch series, and bearings of similar size are not interchangeable. When replacing bearings in existing machinery, confirm the series of the boundary dimension designation, and check inner ring width B and outer ring width C against the step dimensions of the mounting section.

  2. 2. Managing preload with assembled width T and tolerance

    This product: Width T 52 to 463.55 mm

    Width T is the overall width of the inner and outer rings when assembled, and it affects axial mounting dimensions and the adjustment amount for preload or clearance. The assembled width tolerance class changes the effort required for adjustment, so when used in pairs, confirm T and its tolerance class.

  3. 3. Estimating life with basic dynamic load rating

    Basic dynamic load rating Cr is the basis for life calculation. From radial and axial loads, the dynamic equivalent load is obtained using factor e and load factor Y1, and rated life is calculated from the ratio to Cr. The listed Cr values range from 9.5 kN to several tens of thousands of kN and vary greatly with the number of rows.

  4. 4. Checking shock and low-speed use with static load rating

    For applications with stationary operation, very low speed, or shock loads, check the margin against permanent deformation using the ratio of basic static load rating C0r to the static equivalent load (calculated with Y0). For heavy-duty rolling mills and similar uses, secure capacity with double-row or four-row types.

  5. 5. Determining shaft support by load action point position

    Tapered roller bearings have load action points located away from the end face, and the span between supports changes depending on back-to-back or face-to-face arrangement. Use the load action point position a for calculating shaft deflection and reaction forces, and determine the mounting direction accordingly.

  6. 6. Matching rotational speed and lubrication method

    The permissible rotational speed is set higher for oil lubrication than for grease lubrication. Confirm that the operating speed is within the value for each lubrication method. For differentials and other applications where energy saving is required, low-torque types showing the friction torque reduction rate are also candidates.

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

About Tapered Roller Bearings and all products

Description

Includes both metric and inch series. Basic dynamic load ratings, fatigue limit loads, mounting-related dimensions, axial factors, and other data are shown for each model number. Centered on large bearings with bore diameters of 100 mm or more.

Features

  • Simultaneous support of radial and axial loads
  • Inward arrangement
  • Includes metric and inch series

Applications

  • Industrial machinery
  • Mining machinery
  • Steel-making machinery
  • Rolling mill machinery

FAQ

Q. What loads can the double-row tapered roller bearing TDI series support?
A. It supports radial and axial loads simultaneously and is used in an inward-facing combination.
Q. What is the range of bore diameter, outside diameter, and width for the TDI series?
A. Bore diameter d: 100 to 939.8 mm, outside diameter D: 165 to 1333.5 mm, width T: 52 to 463.55 mm.
Q. What kinds of machinery is the TDI series used in?
A. It is used in industrial machinery, mining machinery, steel-making machinery, and rolling mill machinery.
Q. What dimensions and performance information can be checked for the TDI series?
A. Dimensions, basic load ratings, fatigue limit loads, mounting-related dimensions, axial factors, and other data are listed for each model number.
Q. Does the TDI series support metric series, inch series, or both?
A. It includes both metric and inch series.

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

Source documents

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