Lubrication/Grease Hose

Product Overview

A Lubrication/Grease Hose is a specialized flexible conduit designed to deliver grease and lubricating oil reliably under high pressure in automated lubrication systems. This product is manufactured according to china and international standard requirements, ensuring consistent mechanical performance. For engineers and maintenance teams, it provides a durable solution for protecting critical bearings and moving parts.

The construction of this hose features a smooth polyamide tube that resists oil aging, one layer of braided high-resistance synthetic fibers for strength, and a pin-pricked anti-abrasion polyurethane cover. This layered design balances flexibility with burst resistance, making it a preferred rubber hose alternative for grease transfer.

Key performance highlights include a working pressure of up to 40 bar (5800 psi) and a broad temperature range from -40°C to +120°C. With a bend radius as tight as 20mm on smaller diameters, it fits neatly into compact machine layouts. The pin-pricked cover allows trapped gases to escape during installation, preventing cover blisters – a common failure point in lesser hoses.

Core advantages include excellent abrasion resistance from the polyurethane cover, chemical compatibility with mineral oils and lithium-based greases, lightweight construction for easy routing, and high volumetric efficiency which reduces pressure drop. These features directly solve frequent problems such as grease starvation, cover cracking in cold environments, and premature bursting at fitting connections.

Primary applications include centralized lubrication pipelines, automatic grease distribution systems, lubricating oil circuits, and chassis lube lines on commercial vehicles. The Lubrication/Grease Hose is ideal for construction machinery, mining equipment, wind turbines, and industrial press systems that demand scheduled lubrication.

For purchasing managers and maintenance engineers, the core pain points addressed are reducing unplanned downtime from lubrication failure, minimizing environmental leaks from burst hoses, and lowering total ownership cost through longer service intervals. Our Lubrication/Grease Hose meets these needs without requiring frequent Assembly changes.

All hoses are 100% factory pressure-tested before shipment. We provide Service and Support including custom hose assembly with crimped fittings or reusable fittings, adapters, flanges, and protective sleeves. As a leading manufacturer, we offer full traceability and a standard 12-month warranty.

Product Advantages

• High Pressure Performance: Operating up to 40 bar (5800 psi) with 4:1 safety margin, ideal for grease injection spikes.
• Wide Temperature Range: Reliable from -40°C to +120°C, suitable for arctic cold or engine-adjacent heat.
• Abrasion-Resistant Cover: Pin-pricked polyurethane outlasts standard rubber covers by 3x in sliding wear tests.
• Kink-Resistant & Lightweight: Polyamide tube and synthetic braid reduce weight by 30% vs. traditional Wire Braided Hose designs.
• Chemical Compatibility: Withstands mineral oils, synthetic lubricants, and NLGI #00 to #2 greases without swelling.
• Compact Bending: Tight bend radius (as low as 20mm) allows routing through small machine cavities.
• Full Customization: Available as OEM ODM with printing, custom lengths, and pre-installed fittings.

Applicable Users: Maintenance engineers in steel mills, wind farm technicians, construction fleet managers, and lubrication system integrators.

Detailed Technical Specifications Table

Note: Higher pressure models (PLG4090, PLG4288) are recommended for centralized grease systems with high viscosity fluids. Request the full pdf specification sheet for impulse cycle data.

Structure and Materials

Tube (Inner Layer): Smooth polyamide (nylon) – provides low friction for grease flow, resists oil degradation, and prevents particle shedding that could clog lubrication injectors.

Reinforcement (Middle Layer): One layer of braided high-resistance synthetic fibers – offers balanced strength and flexibility, unlike a Wire Spiral Hose which is stiffer; this design is optimal for grease systems requiring moderate working pressure with tight routing.

Cover (Outer Layer): Pin-pricked anti-abrasion polyurethane – protects against impact, weather, and sliding abrasion. The pin-pricked surface prevents steam or gas buildup during hot grease circulation, eliminating blister failures.

This material combination outperforms standard rubber hose constructions in grease applications because polyamide has lower grease absorption and better cold flexibility.

Deep Technical Insight: Why Not Use a High Pressure Hydraulic Hose for Grease?

Many users mistakenly select a High Pressure Hose (e.g., wire spiral) for grease systems. However, standard hydraulic hoses have a rubber tube that reacts with grease additives, leading to inner tube hardening and cracking. A Lubrication/Grease Hose uses a polyamide tube specifically formulated for grease compatibility. Our lab tests show a 400% longer service life compared to using a general-purpose rubber hose in grease service.

Application Industries

Primary Applications

• Centralized lubrication pipelines (single-line or dual-line systems)
• Automotive chassis lubrication (trucks, buses, construction vehicles)
• Wind turbine blade bearing lubrication
• Steel mill continuous casting equipment
• Mining haul truck auto-lube systems
• Industrial press slide lubrication

Precise Selection Professional Guide

1. Hose Assembly Solution: For optimal performance, combine this hose with crimped fittings that use a barbed insert. We supply pre-assembled hose assembly with crimped fittings, reusable fittings for field repair, adapters, and flanges. For abrasive environments, add protective sleeves or guards to extend cover life.

2. Lubrication/Grease Hose vs. Standard Rubber Hose – Comparison

3. Solving Industry Pain Points:

• Cold start failures: Standard hoses stiffen at -20°C, causing grease blockage. This hose works at -40°C.
• Cover blistering: Non-pin-pricked hoses blister when hot grease vaporizes. Our pin-pricked cover prevents this.
• Short service life: Users report replacing rubber grease hoses every 6 months. Our Lubrication/Grease Hose lasts 24+ months in same service.

Technical Standards and Certifications

This Lubrication/Grease Hose is manufactured following international standard practices:

• ISO 3948 (for lubricating equipment hose)
• DIN 73379 (for polyamide tubing)
• RoHS & REACH compliant materials

We provide test reports covering:

• Working pressure hydrostatic test
• Burst pressure verification (4:1 safety factor)
• Low temperature flexibility (-40°C)
• Oil resistance (IRM 903, 72h at 100°C)

Download the complete pdf specification from our technical library.

Brand and Quality Assurance

As a leading china-based manufacturer, producer, and supplier of industrial hoses, we operate an ISO 9001 certified factory. Our quality system includes:

• Incoming material inspection: Polyamide resin and fiber braid are tested for tensile strength and melt flow index.
• In-process controls: Extrusion diameter, braid coverage, and cure temperature are monitored real-time.
• 100% factory testing: Every hose reel undergoes a proof pressure test at 1.5x working pressure.
• Laboratory validation: We maintain a pulse test rig, burst tester, and thermal aging oven.

We are also a distributor, wholesaler, and exporter serving over 50 countries. OEM ODM services are available with custom packaging, labeling, and length specifications.

Customer Case: A wind farm operator in Canada replaced failing rubber hoses every 4 months. After switching to our Lubrication/Grease Hose, they achieved 18 months of trouble-free Service, reducing maintenance cost by 70%.

Installation, Operation, and Maintenance Guide

1. Cutting: Use a sharp hose cutter; polyamide tube can neck if cut with dull blades.
2. Fitting Selection: Use crimped fittings designed for polyamide tube (barbed insert type). Do not use standard compression fittings.
3. Bend Radius: Never exceed the minimum bend radius listed in the specification table. Tighter bends will kink the reinforcement.
4. Grease Compatibility: Compatible with NLGI #00 to #3 greases (lithium, calcium, polyurea, aluminum complex). Avoid fluids with >5% aromatic content.
5. Inspection: Check cover for cuts every 500 operating hours. Replace if wire braid is visible.
6. Storage: Store indoors away from ozone and UV. The polyurethane cover degrades under direct sunlight over 2+ years.

For field repairs, we supply reusable fittings and adapters that can be installed without a crimping machine.

Frequently Asked Questions (FAQ)

Q1: What is the definition of a Lubrication/Grease Hose?
A: A Lubrication/Grease Hose is a flexible tube specifically constructed with a polyamide or nylon tube to resist grease-induced swelling, unlike standard rubber hoses.

Q2: Can I use this with mineral oil lubricants?
A: Yes. The tube is compatible with mineral oils, synthetic oils, and most greases. Avoid using with brake fluid or phosphate esters.

Q3: How do I buy small quantities for a test?
A: You can buy samples directly from our online store. For bulk or wholesale orders, request a quote. We offer discount for orders over 1000 meters.

Q4: What is the standard length per reel?
A: Standard is 100 meters for PLG4086 and PLG4090, 50 meters for larger diameters. Custom cut lengths are available for hose assembly.

Q5: What is the price?
A: Price depends on specification, quantity, and fittings. Contact our sales team for a current cost based on your annual usage. OEM ODM projects receive volume pricing.

Q6: Do you provide technical support for system design?
A: Yes. Our engineering team offers free Solution design, including hose routing analysis and fitting selection. We are a source, supplier, and Service partner, not just a seller.

Stop replacing grease hoses every few months. Upgrade to our Lubrication/Grease Hose and experience longer service life, zero blistering, and reliable cold-weather performance.

Contact our team today to:

• Request a free pdf data sheet or specification drawing
• Get wholesale or bulk pricing with discount for regular orders
• Order custom OEM ODM lengths with your branding
• Receive a sample hose assembly with crimped fittings or reusable fittings
• Discuss your centralized lubrication Solution with our engineers