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Tapered Roller Bearing KESTD3368LFT

Model KESTD3368LFT / KE軸受 / JTEKT Corporation (Official website) / Listed on page 5 of the document

Tapered roller bearing for axle drive pinion applications. Compact model featuring KE bearing technology and low torque specification (LFT).

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Tapered Roller Bearing KESTD3368LFT on page 5 of JTEKT Corporation "円すいころ軸受 アクスルドライブピニオン用"
Source: JTEKT Corporation「円すいころ軸受 アクスルドライブピニオン用」page 5
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Specifications

Inner diameter d 33.338 mm
Outer diameter D 68.263 mm
Width T 22.225 mm
Inner ring width B 22.225 mm
Outer ring width C 15.25 mm
Basic dynamic load rating Cr 66.1 kN
Basic static load rating C0r 62.2 kN
Fatigue Limit Load Cu 8.70 kN
Point of Action Position a 21.8 mm
Coefficient e 0.70
Axial load factor Y1 0.86
Axial load factor Y0 0.47
Mass 0.361 kg

KE軸受 model comparison

Compare 11 models in the same series by specification.

Model Inner diameter d Outer diameter D Width T Basic dynamic load rating Cr Basic static load rating C0r Inner ring width B Outer ring width C Coefficient e
KEST3072CLFT 30 mm 72 mm 20.750 mm 71.2 kN 55.6 kN 19 mm 14 mm 0.55
KEST4183YR1LFT 41.275 mm 82.550 mm 26.543 mm 85.8 kN 75.3 kN 25.654 mm 18 mm 0.72
KEST4190LFTUR4 41.275 mm 90.000 mm 30.006 mm 112 kN 112 kN 30.006 mm 21 mm 0.70
KESTA3779LFT 36.513 mm 79.375 mm 29.370 mm 100 kN 96.4 kN 27.2 mm 20.4 mm 0.67
KESTA4895-1LFTUR4 47.625 mm 95.250 mm 30.162 mm 127 kN 133 kN 29.37 mm 20.5 mm 0.70
KESTD3368LFT This product 33.338 mm 68.263 mm 22.225 mm 66.1 kN 62.2 kN 22.225 mm 15.25 mm 0.70
KESTJ4090LFT 40 mm 90 mm 26.500 mm 110 kN 106 kN 26 mm 18.5 mm 0.62
KESTN3580LFT 35 mm 80 mm 29.000 mm 100 kN 96.4 kN 27.2 mm 20 mm 0.50
KESTR3572LFTYR1 34.925 mm 72.233 mm 23.579 mm 78.8 kN 75.0 kN 23.106 mm 15.463 mm 0.70
KETRD091004UR4 45 mm 100 mm 38.000 mm 164 kN 183 kN 36.5 mm 27.5 mm 0.76
KETRD101004UR4 50.800 mm 104.775 mm 36.512 mm 171 kN 177 kN 34 mm 25.5 mm 0.67

How to choose Tapered Roller Bearings

Points to check when selecting, with the values for this product (KESTD3368LFT).

  1. 1. Dimension series matching shaft and housing

    This product: Inner diameter d 33.338 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 22.225 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

    This product: Basic dynamic load rating Cr 66.1 kN

    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

    This product: Basic static load rating C0r 62.2 kN

    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

    This product: Point of Action Position a 21.8 mm

    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

Features

  • Extended bearing life through KE bearing technology
  • Low torque specification (LFT)

Applications

  • Automotive axles (drive pinion)

FAQ

Q. What applications can the KESTD3368LFT be used for?
A. It is a tapered roller bearing for automotive axle drive pinions.
Q. What are the main features of the KESTD3368LFT?
A. It is a compact model featuring extended bearing life through KE bearing technology and a low torque specification (LFT).
Q. What are the dimensions and mass of the KESTD3368LFT?
A. Bore diameter d is 33.338 mm, outside diameter D is 68.263 mm, width T is 22.225 mm, inner ring width B is 22.225 mm, outer ring width C is 15.25 mm, and mass is 0.361 kg.
Q. What are the basic dynamic load rating, basic static load rating, and fatigue limit load of the KESTD3368LFT?
A. Basic dynamic load rating Cr is 66.1 kN, basic static load rating C0r is 62.2 kN, and fatigue limit load Cu is 8.70 kN.
Q. What are the factors and load center position used in the design calculations for the KESTD3368LFT?
A. Load center position a is 21.8 mm, factor e is 0.70, axial load factor Y1 is 0.86, and Y0 is 0.47.

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

Source documents

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