GORE® Protective Vents for Gearboxes
GORE® Protective Vents for Gearboxes (part number PMF100570) are compact tube-mount ePTFE membrane vent components with an integrated non-woven textile pre-filter, designed to provide pressure equalization and ingress protection for electrified and traditional gearbox components. The vent delivers minimum airflow of 200 ml/min at 12 mbar and Water Entry Pressure (assembly) of > 345 mbar (> 5.0 psi) for 60 seconds, with Ingress Protection ratings of IP66, IP68, and IP69K. Operating temperature range is -40 °C to +125 °C. The membrane is hydrophobic and oleophobic GORE ePTFE.
The vent housing body is PA6.6–GF33 with a PA6.6 Impact modified cap. Overall dimensions are Ø 26.5 mm outer diameter, 34.0 mm height, with a base diameter of Ø 9.5 mm and a body height of 6.8 mm. The integrated non-woven textile pre-filter protects the ePTFE membrane from internal oil aerosols generated by oil-cooled components — a critical feature for gearbox and e-motor applications where an unprotected membrane would degrade rapidly. Manufactured under ISO 9001 quality management system.
Key Properties
- Minimum Airflow: 200 ml/min @ 12 mbar
- Water Entry Pressure (assembly): > 345 mbar (> 5.0 psi) for 60 seconds
- Ingress Protection: IP66, IP68, IP69K
- Operating Temperature Range: -40 °C to +125 °C
- Membrane Type / Characteristic: GORE Membrane oleophobic ePTFE / Hydrophobic and oleophobic
- Pre-Filter Type: Non-woven textile (integrated, protects membrane from internal oil aerosols)
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- Specifications
- Applications
- General Info
- FAQs
Product Identification
| Property | Value | Test Method |
| Product name | Protective Vent for Gearboxes | — |
| Part number | PMF100570 | — |
Performance Characteristics
| Property | Value | Test Method |
| Minimum airflow (per part) | 200 ml/min @ 12 mbar | — |
| Water Entry Pressure (assembly) | > 345 mbar (> 5.0 psi) for 60 seconds | — |
| Ingress Protection (IP) | IP66, IP68, IP69K | IPX9K: Pressure = 80 bar, Distance = 150 mm, Temp = 75 °C |
| Operating temperatures | -40 °C to +125 °C | — |
| Membrane characteristic | Hydrophobic and oleophobic | — |
Materials of Construction
| Property | Value | Test Method |
| Cap material | PA6.6 Impact modified | — |
| Body material | PA6.6 – GF33 | — |
| Membrane type | GORE Membrane oleophobic ePTFE | — |
| Pre-filter type | Non-woven textile | — |
Design Dimensions
| Property | Value | Test Method |
| Outer diameter | Ø 26.5 mm | — |
| Base diameter | Ø 9.5 mm | — |
| Total height | 34.0 mm | — |
| Body height | 6.8 mm | — |
Compliance
- ISO 9001 — Manufacturing quality management system
- IP66 — Verified per IEC 60529
- IP68 — Verified per IEC 60529
- IP69K — Verified (test parameters: 80 bar, 150 mm distance, 75 °C)
- Pressure equalization and ingress protection in oil-cooled e-motor and e-axle housings requiring membrane protection from internal oil aerosols
- Venting for traditional gearbox components including transfer cases, power transfer units, solid beams, and rear/front drive modules
- IP69K-rated venting in gearbox and drivetrain assemblies subject to high-pressure washing (80 bar, 150 mm, 75 °C)
- Compact tube-mount vent integration in space-constrained e-drivetrain packaging where direct-mount is not feasible
- Seal stress reduction in electrified and traditional gearbox components exposed to temperature cycling, altitude changes, and road contamination
Common industries: Automotive, electric vehicle, hybrid vehicle, powertrain systems, e-drivetrain, gearbox manufacturing.
GORE® Protective Vents for Gearboxes address the pressure equalization and ingress protection requirements of oil-cooled electrified and traditional gearbox assemblies, including e-axles, oil-cooled e-motors, transfer cases, power transfer units, solid beams, and rear/front drive modules. As packaging constraints push e-drivetrain components closer to the road surface, these components face increasing exposure to water, submersion, and road contaminants.
The breathable ePTFE membrane continuously equalizes internal pressure differentials caused by thermal cycling and altitude changes, preventing seal stress and maintaining ingress protection. The integrated non-woven textile pre-filter is specifically designed to capture internal oil aerosols before they reach the membrane — preserving long-term venting performance in oil-wetted environments where standard membrane vents would quickly degrade.
The tube-mount format provides design flexibility in component routing and positioning. The compact construction (Ø 26.5 mm outer diameter, 34.0 mm total height) enables integration in space-constrained drivetrain applications. For successful integration, several design considerations must be addressed; contact your Gore representative for guidance on vent positioning and installation details.
Typical applications on the traditional powertrain side include transfer cases, power transfer units, solid beams, and rear/front drive modules; on the e-drivetrain side, e-axles and oil-cooled e-motors.
IPX9K test parameters: Pressure = 80 bar, Distance = 150 mm, Temp = 75 °C. Manufactured under ISO 9001 quality management system. No additional compliance standards are specified on the manufacturer’s TDS beyond the IP ratings and manufacturing quality system noted.
What differentiates GORE® Protective Vents for Gearboxes from standard powertrain vents?
The primary differentiator is the pre-filter type. The Gearboxes variant uses a non-woven textile pre-filter specifically suited to the oil aerosol environment of gearbox and oil-cooled motor applications, compared to the sorbent pre-filter used in the automotive powertrain direct-fit and tube-mount vents. The Gearboxes vent also achieves IP69K in addition to IP66 and IP68, making it suitable for high-pressure wash environments — an important requirement for gearbox housings exposed to cleaning operations or road spray at high velocity.
Why is the integrated pre-filter critical for gearbox venting applications?
Gearboxes and oil-cooled e-motors generate oil aerosols internally during operation. These aerosols coat and rapidly block an unprotected ePTFE membrane, degrading airflow and eventually eliminating pressure equalization — leaving seals exposed to unchecked pressure stress. The integrated non-woven textile pre-filter captures these oil aerosols before they reach the membrane, preserving long-term venting performance and seal protection throughout the component's service life.
What is the operating temperature range for GORE® Protective Vents for Gearboxes?
-40 °C to +125 °C.
Are GORE® Protective Vents for Gearboxes suitable for high-pressure wash environments?
Yes. The vent achieves IP69K, tested at 80 bar water pressure, 150 mm distance, and 75 °C water temperature — making it suitable for gearbox housings subject to high-pressure cleaning in manufacturing or maintenance environments, in addition to standard IP66 and IP68 ingress protection for dust and water immersion.
How should GORE® Protective Vents for Gearboxes be specified?
Specify part number PMF100570, installation format (tube-mount), required IP ratings (IP66, IP68, IP69K as applicable), operating temperature range, and component type (gearbox, transfer case, e-axle, or oil-cooled e-motor). Contact your Gore representative for vent positioning, tube routing guidance, and additional design considerations specific to the component housing geometry.
