Hydraulic hose sheaves play a critical role in guiding and supporting high-pressure hydraulic hoses on cranes, elevated work platforms, drilling equipment, forestry machinery, material handlers, and other mobile hydraulic systems. These sheaves must withstand constant movement, high loads, abrasive environments, and exposure to dirt, moisture, oils, and chemicals while protecting expensive hydraulic hoses from premature wear.
Traditionally, steel sheaves have been used because of their strength. However, modern engineering plastics such as Sustamid 6G MO provide a range of performance advantages that improve equipment reliability, reduce maintenance costs, and significantly extend hydraulic hose life.
Why Sustamid 6G MO Outperforms Steel
Protects Hydraulic Hoses
The primary function of a hose sheave is to guide the hose without damaging its outer cover. Steel sheaves can develop burrs, corrosion, or wear marks over time that abrade hydraulic hoses during every movement.
Sustamid 6G MO offers a naturally smooth, low-friction running surface that is far gentler on hose covers. This reduces abrasion, minimises cover damage, and helps maximise hose service life.
Self-Lubricating Performance
Unlike steel, which often requires lubrication to minimise friction, Sustamid 6G MO contains finely dispersed molybdenum disulphide (MoSâ‚‚), providing internal lubrication throughout the material.
This results in:
- Lower running friction
- Reduced heat generation
- Smoother hose movement
- Less wear between the hose and sheave
- Reduced maintenance requirements
The self-lubricating properties remain effective throughout the life of the component rather than relying on surface coatings or grease.
Eliminates Corrosion
Hydraulic equipment frequently operates in harsh outdoor environments where rain, mud, fertilisers, salt spray, washdown chemicals, and humidity accelerate corrosion.
Unlike steel, Sustamid 6G MO:
- Will not rust
- Will not corrode
- Requires no painting or protective coatings
- Maintains its performance in wet environments
This makes it particularly valuable for marine, mining, agriculture, forestry, and construction equipment.
Significantly Lower Weight
Sustamid 6G MO weighs approximately one-seventh as much as steel.
The reduced component weight offers several operational advantages:
- Easier installation
- Reduced lifting effort during maintenance
- Lower overall machine weight
- Reduced rotating mass
- Improved efficiency of moving boom systems
Weight reduction becomes increasingly valuable on cranes and boom-mounted equipment where every kilogram contributes to overall machine performance.
Excellent Wear Resistance
Sustamid 6G MO is specifically engineered for sliding and rolling wear applications.
Its excellent wear resistance allows hydraulic hose sheaves to operate for extended periods while maintaining dimensional stability and a smooth running surface.
The material also resists surface scoring better than many traditional plastics.
Outstanding Impact Resistance
Hydraulic hose sheaves are regularly subjected to shock loading, hose whip, vibration, and impacts from debris.
Sustamid 6G MO provides excellent toughness, helping prevent cracking or brittle failure under demanding operating conditions.
Reduces Operating Noise
Steel sheaves generate noise whenever hydraulic hoses move across their surface.
Sustamid 6G MO naturally dampens vibration, producing significantly quieter operation. This is particularly beneficial for:
- Elevated work platforms
- Forestry equipment
- Underground mining equipment
- Mobile cranes
- Industrial automation
Machining Efficiency
Compared with steel, Sustamid 6G MO machines quickly using conventional tooling.
Benefits include:
- Faster manufacturing
- Lower machining costs
- Shorter lead times
- Easy production of custom profiles and groove geometries
- Simplified replacement component manufacture
This enables rapid turnaround for replacement sheaves when equipment downtime must be minimised.
| Property | Nylatron GSM | Steel |
|---|---|---|
| Hose-friendly running surface | Excellent | Fair |
| Corrosion resistance | Excellent | Poor Without coatings |
| Weight | Very Low | High |
| Self-Lubricating | Yes | No |
| Maintenance requirements | Low | Moderate to High |
| Noise generation | Low | Moderate |
| Wear Resistance | Excellent | Good |
| Impact Resistance | Excellent | Excellent |
| Machining cost | Lower | Higher |
| Protects hydraulic hose covers | Excellent | Moderate |
Typical Applications
Sustamid 6G MO hydraulic hose sheaves are widely suited to:
- Mobile cranes
- Knuckle boom cranes
- Truck-mounted cranes
- Elevated work platforms
- Drill rigs
- Excavators
- Forestry harvesters
- Material handlers
- Mining equipment
- Agricultural machinery
- Hydraulic boom systems
The Dotmar Advantage
Dotmar manufactures precision-machined hydraulic hose sheaves from Sustamid 6G MO to suit both OEM production and replacement applications. Components can be custom machined to match existing dimensions or redesigned to improve hose performance and service life. With extensive engineering plastics expertise, CNC machining capability, and nationwide stock availability, Dotmar delivers durable, lightweight solutions that reduce maintenance, protect valuable hydraulic hoses, and help maximise equipment uptime.
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