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Inner Ring (IR8X12X12D)

Inner Ring IR8X12X12D
  • On Sale Till 31/03/2025

NTN

NTN

Optimal for use with shafts that cannot be surface hardened or finished,
although shafts are often used directly as raceway surfaces without a needle roller bearing inner ring.

PDF

Japanese Only

Part Number

Configured Part Number is shown.

IR8X12X12D

Drawing

Inner ring drawing

Product features details

Needle-shaped roller bearings often use the shaft directly as the raceway surface without using the inner ring, but when using a shaft that cannot be surface-hardened or ground, it is better to use the inner ring described here.
The inner ring is made of high carbon chrome bearing steel and is heat-treated and then ground.
It is desirable to use a wide inner ring when the axia ltravel length of the shaft with respect to the housing is large and when a seal is used on the outside of the bearing.

 

Normally, needle-shaped roller bearings use the shaft as the raceway surface without using the inner ring, but if the surface of the shaft cannot be processed to the specified hardness and roughness, the inner ring is used. High carbon chrome bearing steel is used, and after heat treatment, a high-precision grinding finish is applied.

  • It can also be used as a bushing.
  • There are metric and inch systems.
  • There is also a type with a lubrication hole in the center of the raceway surface.

Selection support information

Order example

Inner ring order example

The nominal number consists of a formal notation, a dimension symbol [inner diameter (d) × track diameter (F) × width (B)], and a suffix.

30
45
60
  1. 1
Part Number
IR8X12X12D
Part NumberStandard Unit PriceMinimum order quantityVolume DiscountDays to ShipRoHSI.D.
(㎜) 		O.D.
(㎜) 		Width
(㎜) 		With Oil Hole

SGD 5.19

1 Piece(s) 7 Day(s) or more -81212Included

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  1. 1
 

Please check the type/dimensions/specifications of the part IR8X12X12D in the Inner Ring series.

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Specification/Dimensions

  • type

    • IR

    Clear

  • I.D.(㎜)

    • 5
    • 6
    • 7
    • 8
    • 9
    • 10
    • 12
    • 14
    • 15
    • 17
    • 20
    • 22
    • 25
    • 28
    • 30
    • 32
    • 35
    • 38
    • 40
    • 42
    • 45
    • 50
    • 55
    • 60
    • 65
    • 70
    • 75
    • 80
    • 85
    • 90
    • 95
    • 100
    • 110

    Clear

  • O.D.(㎜)

    • 7
    • 8
    • 10
    • 12
    • 13
    • 14
    • 15
    • 16
    • 17
    • 18
    • 19
    • 20
    • 21
    • 22
    • 24
    • 25
    • 26
    • 28
    • 29
    • 30
    • 32
    • 35
    • 37
    • 40
    • 42
    • 43
    • 45
    • 47
    • 48
    • 50
    • 52
    • 55
    • 58
    • 60
    • 63
    • 65
    • 68
    • 70
    • 72
    • 75
    • 80
    • 85
    • 90
    • 95
    • 100
    • 105
    • 110
    • 115
    • 125

    Clear

  • Width(㎜)

    • 10
    • 10.5
    • 11
    • 12
    • 12.5
    • 13
    • 14
    • 15.5
    • 16
    • 16.5
    • 17
    • 17.5
    • 18
    • 20
    • 20.5
    • 21
    • 22
    • 22.5
    • 23
    • 25
    • 25.5
    • 26
    • 26.5
    • 27
    • 28
    • 28.5
    • 30
    • 30.5
    • 32
    • 34
    • 35
    • 36
    • 38.5
    • 40
    • 45
    • 46
    • 54
    • 60
    • 63

    Clear

  • With Oil Hole

    • Included
    • No

    Clear

Days to Ship

    • All
    • Same day
    • 4 Day(s) or Less
    • 7 Day(s) or Less
    • 8 Day(s) or Less
    • 11 Day(s) or Less

    Clear

Specify Alterations

Similar Part Numbers

Part Number
IR100X115X40
IR100X115X54
IR10X13X12.5
IR90X100X26
IR90X100X30
IR90X100X36
Part NumberStandard Unit PriceMinimum order quantityVolume DiscountDays to ShipRoHSI.D.
(㎜) 		O.D.
(㎜) 		Width
(㎜) 		With Oil Hole

SGD 55.30

1 Piece(s) 7 Day(s) or more -10011540-

SGD 74.00

1 Piece(s) 7 Day(s) or more 1010011554-

SGD 4.59

1 Piece(s) 4 Day(s) or more -101312.5No

SGD 39.88

1 Piece(s) 7 Day(s) or more -9010026-

SGD 46.08

1 Piece(s) 7 Day(s) or more -9010030-

SGD 51.11

1 Piece(s) 7 Day(s) or more -9010036-

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