Views: 3 Author: Site Editor Publish Time: 2026-10-13 Origin: Site
Modern commercial vehicle progressive lubrication systems demand tough, highly adaptable fluid routing to withstand harsh environmental conditions and intense operating pressures. When field retrofitting or maintaining automated grease networks, self-installation high-pressure lubrication hoses provide fleet operators and technicians with the ultimate flexibility to cut, fit, and assemble durable lines directly on-site without heavy specialized swaging machinery.
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These specialized, flexible lines are engineered to manage demanding medium-to-heavy grease consistency, rated for grease grade: up to NLGI 2. They handle two distinct zones within automated layouts:
Centralized Lubrication Main Lines: Transporting grease under peak delivery pressures directly from the central pump unit to the primary progressive distribution blocks (Pump → Feeder).
Secondary Lubrication Lines: Routing precisely metered lubricant from the distribution blocks down to individual chassis bearings, joints, and critical wear points (Feeder → Lubrication Point).
Installation Tip: When calculating your total hose cut-to-length profile for field assembly, always add exactly double the engaged thread length to your measurements to account for fitting insertion depth and ensure zero line tension.
Different sections of a commercial vehicle chassis demand specific hose characteristics. Our versatile high-pressure line configurations include the following standard engineering profiles:
Nominal Size | Max Supply Length | Rupture Pressure | Min. Bending Radius | Key Materials & Construction |
NW4 (Tube Ø6 mm) | 50 m | 800 bar | 35 mm | Premium polyester inner liner, robust black weather-proof PU outer cover; paired with Zinc-Nickel steel fittings. Also available in a rugged steel-sheathed variant for extreme impact zones. |
NW6 (Tube Ø8 mm) | 50 m | 840 bar | 50 mm | Advanced polyamide inner liner reinforced with high-tensile braided synthetic fibre; paired with zinc-plated fittings. |
NW8 (Tube Ø10 mm) | 50–100 m | 315 bar | 55 mm | Heavy-duty oil-resistant Perbunan liner, diagonal-woven synthetic-fibre reinforcement, and a neoprene weather-proof outer cover. |
To streamline your procurement and accelerate your field installation timeline, look for these advanced options and compatible accessories:
Grease Factory Pre-Filled (Suffix +AF2): Order your high-pressure lines with the +AF2 suffix to receive hoses completely pre-filled with high-grade NLGI 2 grease straight from the factory. This eliminates air pockets and drastically reduces line bleeding times during on-site commissioning.
End Fittings & Connectors: Full compatibility with standard assembly sleeves and heavy-duty tube stubs. This includes straight, 45° angle, and 90° elbow claw-groove tube stubs engineered for secure, leak-free locking with push-in/plug-in style connectors.
For maximum service life and to protect your progressive system from unexpected blockages or component fatigue, always observe these three operational boundaries:
Respect the Minimum Bending Radius: Forcing a hose past its rated radius (e.g., tighter than 35 mm on an NW4 line) creates kinking, internal friction heat, and localized pressure stress, which leads to premature outer jacket structural failure.
Corrosion Mitigation: All matching steel integration sleeves, stubs, and joiners are treated with professional-grade zinc galvanization to reliably prevent oxidation caused by road salt, moisture, and grime.
Circuit Restrictions: Due to its specific material composition and balanced pressure rating, NW8 is intended for main pump-to-feeder circuits only and should not be used as a secondary feed line down to individual tight-clearance chassis grease points.
With over 20 years of focus on high-durability fluid connectors, Fitsch manufactures a massive range of centralized lubrication fittings and high pressure flexible grease lines built to rigid international standards. Operating a state-of-the-art facility equipped with 200 high-precision CNC machines, we guarantee premium structural compliance, extensive quality control testing, and competitive wholesale pricing. Contact us today to receive an exact cross-reference quote for your fleet maintenance needs.
Application: Progressive lubrication systems for commercial vehicles; compatible with grease up to NLGI Grade 2. Used for main lines (pump‑to‑feeder) and secondary lines (feeder‑to‑lubrication point).
When calculating required hose length: take the engaged thread length and double it for dimensioning the final hose length.
Used for main lines (pump‑feeder) and secondary lines (feeder‑lubrication point)
Item Description | Part Number | Max Supply Length |
|---|---|---|
High‑pressure hose | 982‑750‑091 | 50 m |
High‑pressure hose pre‑filled with NLGI Grade 2 grease | 982‑750‑091+AF2 | 50 m |
Steel‑sheathed high‑pressure hose pre‑filled with NLGI Grade 2 grease | 982‑750‑092+AF2 | 50 m |
Sleeve | 853‑540‑010 | — |
Straight tube stub with claw groove for plug‑in connector | 853‑370‑002 / 853‑380‑002 / 853‑390‑002 / 853‑370‑002‑VS / 853‑380‑002‑VS | — |
45° angled tube stub with claw groove for plug‑in connector | 853‑380‑004 / 853‑380‑004‑VS | — |
90° angled tube stub with claw groove for plug‑in connector | 853‑380‑003 / 853‑390‑003 / 853‑390‑004 / 853‑380‑003‑VS | — |
NW4 Hose Technical Specifications
Rupture pressure: 800 bar
Minimum bending radius: 35 mm
NW4 Material Composition
Hose inner lining: Unplasticized polyester
Hose outer cover: Weather‑resistant black polyurethane
Sleeve & tube stubs: Galvanized steel
Used for main lines (pump‑feeder) and secondary lines (feeder‑lubrication point)
Item Description | Part Number | Max Supply Length |
|---|---|---|
High‑pressure hose | 982‑750‑111 | 50 m |
High‑pressure hose pre‑filled with NLGI Grade 2 grease | 982‑750‑111+AF2 | 50 m |
Sleeve | 406‑808‑005 | — |
Straight tube stub | 406‑708‑005 | — |
NW6 Hose Technical Specifications
Rupture pressure: 840 bar
Minimum bending radius: 50 mm
NW6 Material Composition
Hose inner lining: Unplasticized polyamide
Reinforcement layer: Braided synthetic fibres
Sleeve & tube stubs: Galvanized steel
For main lines (pump‑feeder)
Item Description | Part Number | Max Supply Length |
|---|---|---|
High‑pressure hose | WVN711‑10 | 100 m |
High‑pressure hose pre‑filled with NLGI Grade 2 grease | WVN711‑10+AF2 | 50 m |
Sleeve | 406‑810‑002 | — |
Straight tube stub | 406‑710‑002 | — |
NW8 Hose Technical Specifications
Rupture pressure: 315 bar
Minimum bending radius: 55 mm
NW8 Material Composition
Hose inner lining: Perbunan
Reinforcement layer: Diagonally‑woven synthetic fibres
Hose outer cover: Weather‑resistant neoprene
Sleeve & tube stubs: Galvanized steel
