QUALITY & EXPERTISE FOR YOUR SEALING NEEDS

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SEAL DESIGN

Tolerance for the inside diameter of the seal (Ød)

Shaft diameter

Ød1 (mm)

Apparent metal cage

Rubber coating

Coating with grooves

Ød1 ≤ 50.0

-0.20 / -0.10

-0.30 / -0.15

-0.40 / -0.20

50.0 < Ød1 ≤ 80.0

-0.23 / -0.13

-0.35 / -0.20

-0.45 / -0.25

80.0 < Ød1 ≤ 120.0

-0.25 / -0.15

-0.35 / -0.20

-0.45 / -0.25

120.0 < Ød1 ≤ 180.0

-0.28 / -0.18

-0.45 / -0.25

-0.55 / -0.30

180.0 < Ød1 ≤ 300.0

-0.30 / -0.20

-0.45 / -0.25

-0.55 / -0.30

300.0 < Ød1 ≤ 500.0

-0.35 / -0.23

-0.55 / -0.30

-0.65 / -0.35

Roundness tolerance

Shaft diameter

Ød1 (mm)

Apparent metal cage

Rubber coating

Ød1 ≤ 50.0

0.18

0.25

50.0 < Ød1 ≤ 80.0

0.25

0.35

80.0 < Ød1 ≤ 120.0

0.30

0.50

120.0 < Ød1 ≤ 180.0

0.40

0.65

180.0 < Ød1 ≤ 300.0

0.25% of the inside diameter

0.80

300.0 < Ød1 ≤ 500.0

0.25% of the inside diameter

1.00

Tolerance for the outside diameter of the seal (ØD)

Free and without constraint, the outside diameter of the sealing lip is always bigger than

the diameter of the rotating hub. The pre-tightening or interference denotes the difference

between these two values. Depending on the hub diameter, the diameter of the sealing lip is

generally considered to be greater, between 0.8 and 3.5 mm.

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DESCRIPTION

The OVBC profile is an inverted shaft

seal composed of a single internal metal

cage with a rubber coating covering

half of the outside of the cage and a

primary sealing lip without spring.

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ADVANTAGES

Good radial rigidity, particularly

for large diameters

Good stability when assembled,

preventing the bounce-back effect

Good static sealing

Good thermal expansion compensation

Good heat transfer

Sealing for high viscosity fluids

Primary sealing lip generating

low levels of friction and heat

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APPLICATIONS

All types of rotative applications

Rotating hubs

Fixed shafts

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MATERIALS

Rubber

ACM 70 - 75 Shore A

EPDM 70 - 75 Shore A

FKM 70 - 75 Shore A

HNBR 70 - 75 Shore A

NBR 70 - 75 Shore A

Metal cage

Steel - AISI 1010

Stainless steel - AISI 304

Stainless steel - AISI 316

INVERTED SHAFT SEALS

OVBC

ROTARY SEALS | INVERTED SHAFT SEALS |

OVBC