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O-Ring P For Movement And Fixing (Cylindrical Surface) (P8-1A)

O-Ring P For Movement And Fixing (Cylindrical Surface) P8-1A
  • Volume Discount

MUSASHI_OILSEAL

MUSASHI_OILSEAL

Series of O-rings specified in JIS standards (for both movement and fixing use).
[Features]
·It has good sealing performance with self-sealing action despite its simple structure
·Stable sealing performance even under high pressure
·Compact installation space and easy installation
·Sealing is not directional and is possible from both sides
[Applications]
·A JIS standard series for various machines
·For fixing use, the material can be selected depending on the usage conditions, so it can be used in a wide range of applications

PDF

Japanese Only

Part Number

Configured Part Number is shown.

P8-1A

Drawing

Groove Dimensions and Shape for Movement and Fixing Use (Cylindrical Surface)

[Color Scheme]

  • Nitrile rubber: Black
  • Silicone rubber: Vermilion (Orange)
  • Fluoroelastomer: Black
Groove dimensions and geometrical drawing

Groove dimensions and geometrical drawing

Product Specification

Image of O-ring

Image of O-ring

Specifications Table

MaterialJIS StandardOld JIS standardColorHardness
Type A durometer		Operating temperature range
Nitrile RubberNBR-70-1Class 1 ABlackA70 +/- 5-30℃ to +100℃
NBR-90Class 1 BA90 +/- 5-25℃ to +100℃
NBR-70-2Class 2A70 +/- 5-25°C to +80°C
Silicone rubberVMQ-70Class 4CVermilionA70 +/- 5-50°C to +200°C
FluoroelastomerFKM-70Class 4DBlackA70 +/- 5-15°C to +200°C
Nominal numberO-ring actual sizeGroove section dimensionsGroove section dimensionsReferenceNominal number
Hole diameter DReferenceHole diameter DReferenceG 0 to +0.25RESqueeze
d2d1Fitting symbol equivalent to tolerance of dFitting symbol equivalent to tolerance of DNo backup ring1 backup ring2 backup ringsMaximumMaximummm%
MaximumMinimumMaximumMinimum
*P21.9+/- 0.081.8+/- 0.1420 -0.05---5+0.05 0-2.53.95.40.40.050.480.2724.214.8*P2
P32.8+/- 0.143h9f8e96H10P3
P43.8+/- 0.1447-P4
P54.8+/- 0.1558P5
P65.8+/- 0.1569P6
P76.8+/- 0.167e810P7
P87.8+/- 0.16811P8
P98.8+/- 0.17912P9
P109.8+/- 0.171013P10
P10A2.4+/- 0.099.8+/- 0.17100 -0.0614+0.06 03.24.46.00.490.2519.710.8P10A
P1110.8+/- 0.181115P11
P11.211+/- 0.1811.215.2P11.2
P1211.8+/- 0.191216P12
P12.512.3+/- 0.1912.516.5P12.5
P1413.8+/- 0.191418P14
P1514.8+/- 0.201519P15
P1615.8+/- 0.201620P16
P1817.8+/- 0.211822P18
P2019.8+/- 0.2220e724P20
P2120.8+/- 0.232125P21
P2221.8+/- 0.242226P22

Product Feature Details

  • An O-ring is a synthetic rubber ring made for the purpose of sealing liquid or gas in reciprocating or fixed parts.
  • Generally installed in a groove, it exerts its sealing function through the stress generated by moderate compression.
  • This product is easier to install than any other packing, takes up less space, and can be done the same way by anyone, and its self-sealing action provides stable sealing performance even under high pressure using only an O-ring.
  • It can be installed with a small amount of compression (squeeze) and has relatively low kinetic frictional resistance for higher efficiency.
  • It does not cause overtightening of nuts when used for fixing.

Principle of action

Image diagram of how it works

Image diagram of how it works

  • Figure 1: When an O-ring seals a fluid with no pressure or slight pressure, the O-ring maintains a tight seal with a tab that equivalent to a certain percentage of the cross-sectional diameter.
  • As the fluid pressure increases as shown in Figure 2, the crushed O-ring in the groove is pushed from the pressure side and shifts to one side, creating a self-sealing effect.
  • Figure 3: If the pressure increases further and exceeds 10 MPa, the softness of the rubber will cause it to penetrate into the gap, which damages the O-ring.
  • Figure 4: To prevent this, if there is pressure on the opposite side of the pressure direction or on both sides, attach backup rings made of leather or fluoropolymer to both sides of the O-ring.

Cautions and Prohibitions

Cautions and Prohibitions

  • For movement purpose, the sliding metal surface should be finished smoothly (approximately 1.5S). The inside of the groove should be about 3S.
  • If the reciprocating sliding surface has holes, etc., take care to protect them.
  • Do not use more than 2 O-rings in the same location.
  • Pay attention to the groove design.
  • If the O-ring breaks down, it will suddenly leak and cause an accident, so be sure to replace it at the end of its useful life for dynamic applications.
  • Due to its rubbery nature, it will age in the air, so care must be taken when storing it.

Behind the Scenes

 

O-rings come in a variety of standards and materials, each with different characteristics. The manufacturer has researched and developed as many combinations of these as possible to offer a product lineup that meets the needs of its customers.

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45
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  1. 1
Part Number
P8-1A
Part NumberStandard Unit PriceMinimum order quantityVolume DiscountDays to ShipRoHSType I.D. d1
(mm) 		Thickness d2
(mm) 		Material Type of Material Nominal Number

MYR 1.51

10 Piece(s)Available 10 Day(s) or more 10-7.81.9Nitrile RubberA Type AP08

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  1. 1
 

Basic Information

Standard P (For Motion / Fixing)

Please check the type/dimensions/specifications of the part P8-1A in the O-Ring P For Movement And Fixing (Cylindrical Surface) series.

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Specification/Dimensions

  • Type

    • O-Ring

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  • type

    • P-1A
    • P-1B
    • P-2
    • P-4C
    • P-4D

    Clear

  • I.D. d1(mm)

    • 1.8
    • 2.8
    • 3.8
    • 4.8
    • 5.8
    • 6.8
    • 7.8
    • 8.8
    • 9.8
    • 10.8
    • 11
    • 11.8
    • 12.3
    • 13.8
    • 14.8
    • 15.8
    • 17.8
    • 19.8
    • 20.8
    • 21.7
    • 21.8
    • 22.1
    • 23.7
    • 24.7
    • 25.2
    • 25.7
    • 27.7
    • 28.7
    • 29.2
    • 29.7
    • 30.7
    • 31.2
    • 31.7
    • 33.7
    • 34.7
    • 35.2
    • 35.7
    • 37.7
    • 38.7
    • 39.7
    • 40.7
    • 41.7
    • 43.7
    • 44.7
    • 45.7
    • 47.6
    • 47.7
    • 48.7
    • 49.6
    • 49.7
    • 51.6
    • 52.6
    • 54.6
    • 55.6
    • 57.6
    • 59.6
    • 61.6
    • 62.6
    • 64.6
    • 66.6
    • 69.6
    • 70.6
    • 74.6
    • 79.6
    • 84.6
    • 89.6
    • 94.6
    • 99.6
    • 101.6
    • 104.6
    • 109.6
    • 111.6
    • 114.6
    • 119.6
    • 124.6
    • 129.6
    • 131.6
    • 134.6
    • 139.6
    • 144.6
    • 149.5
    • 149.6
    • 154.5
    • 159.5
    • 164.5
    • 169.5
    • 174.5
    • 179.5
    • 184.5
    • 189.5
    • 194.5
    • 199.5
    • 204.5
    • 208.5
    • 209.5
    • 214.5
    • 219.5
    • 224.5
    • 229.5
    • 234.5
    • 239.5
    • 244.5
    • 249.5
    • 254.5
    • 259.5
    • 264.5
    • 269.5
    • 279.5
    • 289.5
    • 294.5
    • 299.5
    • 304.5
    • 309.5
    • 314.5
    • 319.5
    • 324.5
    • 329.5
    • 334.5
    • 339.5
    • 349.5
    • 354.5
    • 359.5
    • 364.5
    • 369.5
    • 384.5
    • 529.5

    Clear

  • Thickness d2(mm)

    • 1.9
    • 2.4
    • 3.5
    • 5.7
    • 8.4

    Clear

  • Material

    • Nitrile Rubber
    • Silicone Rubber
    • Fluoroelastomer
      • Fluorine Rubber

    Clear

  • Type of Material

    • Class 1 A
    • Class 2
    • Class 4 C
    • Class 4 D
    • A Type A
    • A Type B

    Clear

  • Nominal Number

    • P02
    • P03
    • P04
    • P05
    • P06
    • P07
    • P08
    • P09
    • P10
    • P10A
    • P11
    • P11.2
    • P12
    • P12.5
    • P14
    • P15
    • P16
    • P18
    • P20
    • P21
    • P22
    • P22A
    • P22.4
    • P24
    • P25
    • P25.5
    • P26
    • P28
    • P29
    • P29.5
    • P30
    • P31
    • P31.5
    • P32
    • P34
    • P35
    • P35.5
    • P36
    • P38
    • P39
    • P40
    • P41
    • P42
    • P44
    • P45
    • P46
    • P48
    • P48A
    • P49
    • P50
    • P50A
    • P52
    • P53
    • P55
    • P56
    • P58
    • P60
    • P62
    • P63
    • P65
    • P67
    • P70
    • P71
    • P75
    • P80
    • P85
    • P90
    • P95
    • P100
    • P102
    • P105
    • P110
    • P112
    • P115
    • P120
    • P125
    • P130
    • P132
    • P135
    • P140
    • P145
    • P150
    • P150A
    • P155
    • P160
    • P165
    • P170
    • P175
    • P180
    • P185
    • P190
    • P195
    • P200
    • P205
    • P209
    • P210
    • P215
    • P220
    • P225
    • P230
    • P235
    • P240
    • P245
    • P250
    • P255
    • P260
    • P265
    • P270
    • P280
    • P290
    • P295
    • P300
    • P305
    • P310
    • P315
    • P320
    • P325
    • P330
    • P335
    • P340
    • P350
    • P355
    • P360
    • P365
    • P370
    • P385
    • P530

    Clear

Days to Ship

    • All
    • 4 Day(s) or Less
    • 10 Day(s) or Less
    • 11 Day(s) or Less
    • 12 Day(s) or Less
    • 13 Day(s) or Less
    • 14 Day(s) or Less
    • 16 Day(s) or Less
    • 17 Day(s) or Less
    • 18 Day(s) or Less
    • 23 Day(s) or Less

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Specify Alterations

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(mm) 		Material Type of Material Nominal Number

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