Synertech Stock
Rotating shaft oil seals GP/W
GP/W oil seal with metal case coated in rubber with external ribs, double lip, steel spiral spring.
Product codes
Details
The GP_W series seals are high-performance dynamic seals designed for the retention of fluid oils and greases on rotating shafts. The profile combines a main lip preloaded by a garter spring, an auxiliary front dust lip and a rubber-covered outer diameter with a ribbed/wave profile. This configuration is specifically designed for mechanical components operating in highly contaminated environments and featuring light-metal housings subject to significant temperature fluctuations.
GP_W Standard
Double-lip profile, with a spring-loaded main sealing lip and an auxiliary dust lip without a spring, with an outer diameter featuring parallel rubber waves and an embedded "L"-shaped reinforcement.
GP_W Special
Variant with reinforced, extended or specially shaped dust lip, suitable for heavy-duty applications such as harsh agricultural and muddy environments.
Materials and operating conditions
| Material / Compound | Peripheral speed | Temperature | Max pressure |
|---|---|---|---|
| NBR Nitrile rubber 70 / 80 ShA |
Up to 12.0 m/s Up to 0.5 m/s in low-speed applications |
−30 / +100 °C | 0.05 MPa Standard atmospheric pressure |
| FKM Fluoroelastomer / Viton |
Up to 35.0 m/s | −20 / +200 °C | — |
Internal structure
Mineral hydraulic oils, fluid gear lubricants, mineral and synthetic greases, water, mud and abrasive dust.
Main features
Multi-wave rubber-covered outer surface
The wave-shaped ribs deform elastically during mechanical press-fitting. This design reduces insertion force compared with a smooth outer surface, limits the risk of elastic rebound and helps prevent damage or scoring of the housing.
Compensation for aluminium housings
The wave-shaped outer finish ensures optimal static sealing by compensating for the high thermal expansion coefficient of housings made from light alloys such as aluminium and magnesium.
Double-lip protective action
The spring-loaded main lip retains the lubricant inside, while the second auxiliary lip shields and repels environmental contaminants such as sand, dust and moisture before they reach the primary dynamic sealing area.
Advantages of the GP_W profile
Labyrinth effect in the housing
The external ribs create a series of micro-barriers in the housing groove, counteracting secondary static leakage even in housings with suboptimal surface roughness.
Extended service life
The dust lip prevents external abrasive particles from reaching the main lip and reduces the risk of premature scoring on the rotating shaft diameter.
Grease cavity
The space between the main lip and the dust lip can be filled with grease during installation, reducing friction on the auxiliary lip and trapping the finest dust particles.
Typical applications
- Housings, gearboxes, speed reducers and wheel hubs exposed to the external environment with aluminium or light-alloy seats
- Transmissions, power take-offs (PTO) and angle drives in agricultural machinery
- Wheel hubs, drive shafts and differentials in the automotive, truck and motorcycle sectors
- Electric motors, hydraulic pumps and industrial fans operating outdoors or in dusty environments
- Cylinders, travel gearboxes and rotary actuators for construction and heavy earthmoving machinery
International standards
Construction dimensions, geometric tolerances and installation dimensions in compliance with DIN 3760 Form AS (Wave) and ISO 6194-1 Type 2 standards, for profiles with ribbed outer surfaces and a protective lip.
Available configurations
GP_W Standard
Configuration suitable for general industrial and automotive replacement parts exposed to the external environment, particularly suitable for aluminium housings operating with conventional mineral oils at standard temperatures in dusty environments.
GP_W Premium
Specific configuration for high-speed shafts up to 35 m/s or for high-temperature environments in contact with aggressive synthetic oils, in the presence of significant thermal expansion of the housing and high environmental contamination.
Market equivalents
| Manufacturer | GP_W Standard - NBR | GP_W Premium - FKM / Viton |
|---|---|---|
| Net Seals | Oil Seal Series G_W with Dust Lip / WAS-w / TC-w | Viton Oil Seal Series G_W with Dust Lip / WAS-w FKM |
| Freudenberg (Simrit) | Simmerring® BASL Wave Profile | Simmerring® BASL FKM Wave Profile |
| Parker Prädifa | OSHAL Ribbed Profile | OSHAL FKM Ribbed Profile |
| Dichtomatik | WAS Wave Profile | WAS FKM Wave Profile |
| Kastas Sealing Technologies | K28 / K30 Wave Profile | — |
| Corteco | Type GP Ribbed Oil Seal Series with Dust Lip | — |
| SKF | — | Viton wave-profile radial shaft seals with auxiliary lip |