CuZn25Al5 Bronze with Graphite Plug Bushings (C86300) – Premium Self-Lubricating Solutions for Steel Plants | Viiplus

Viiplus supplies high-performance CuZn25Al5 bronze (C86300 high-strength brass/bronze) bushings with solid graphite lubricant plugs, engineered for the extreme operating conditions found in steelmaking and continuous casting lines. Designed for heavy loads, high temperatures, abrasive scale, and dirty environments, our oil-less bushings deliver unmatched durability and maintenance-free reliability for steel companies worldwide.

Why CuZn25Al5 (C86300) Bronze with Graphite Plugs?

CuZn25Al5 is a high-strength aluminum bronze with exceptional properties:

• Load capacity: 150–250 MPa

• High wear resistance under oscillating or sliding motion

• Corrosion resistance in steam, cooling water, and alkaline slag

• Low friction (<0.15) thanks to self-lubricating graphite plugs

• Long service life without external lubrication

With 25–30% graphite plug coverage, these bearings release a lubricating film under load, making them ideal for oil-less, maintenance-free operation in harsh steel mill environments.

Engineered for Harsh Steel Industry Conditions

Steel plants expose bearings to abrasive dust, scale, thermal shock, vibration, and water spray. Viiplus CuZn25Al5 graphite bushings are designed specifically to withstand:

• High radial and thrust loads

• High temperatures up to 300°C

• Dirty environments where grease is washed away

• Frequent start–stop cycles

• Misalignment and vibration

• Corrosive slag and cooling water

Key Applications in Steelmaking and Continuous Casting

Below are typical positions where Viiplus CuZn25Al5/C86300 graphite plug bushings significantly outperform conventional lubricated bearings.

1. Withdrawal & Straightening Units (Continuous Casting Lines)

• Split thrust bushes for roll chocks

• Sliding bushes for roller guides and bow supports

Benefits:

• Operate reliably in wet, dusty casting zones

• No oil contamination risk; cooling water supports lubrication

• Extend roll/chock service life 2–4×

• Excellent performance during frequent restarts

2. Slag Breakers & On-Board Crusher Components

• Hinge and thrust bushings for breaker arms

• Wear plates and sliding pads near slag chutes

Benefits:

• Handles shock loads and abrasive slag contact

• Prevents binding and reduces unplanned stops by 15–25%

• Graphite film reduces wear by 40% compared to greased steel bushes

3. Sand Conveying & Dispenser Systems

• Sliding bushes for feeding gates and conveyor slide rails

• Guide bushings for sand hoppers and discharge arms

Benefits:

• Withstand abrasive silica sand without galling

• Maintenance-free operation up to 200°C

• Improve dosing accuracy, reduce sand spillage 20–30%

4. Pinch Roll Units, Dummy Bar Storage, and Electrode Support Arms

• High-strength oil-less bushings for pivoting and sliding components

• Resist oxidation from furnaces, coolant washout, and scale buildup

• Suitable for heavy intermittent loads and continuous vibration

Advantages of Viiplus CuZn25Al5/C86300 Graphite Plug Bushings

✔ Zero Lubrication — No Grease Lines Needed

Perfect for inaccessible or contamination-sensitive areas.

✔ Long Service Life

2–5× longer than conventional bronze or steel bushings.

✔ High Load & High Temperature Performance

Stable up to 300°C in casting and furnace zones.

✔ Superior Wear & Corrosion Resistance

Withstands slag, scale, steam, and abrasive particulates.

✔ Custom-Machined Solutions

• Tolerance: ±0.01 mm

• Graphite plug orientation optimized for load direction

• Split bush designs for easy installation

Why Steel Companies Choose Viiplus

As a global supplier of self-lubricating bearing solutions, Viiplus supports OEMs, equipment rebuilders, and steel producers with:

• High-precision machining

• Fast lead times

• Custom bushing, plate, and wear part manufacturing

• Reliable material traceability and quality control

Our CuZn25Al5/C86300 bronze graphite plug bushings improve uptime, reduce lubrication costs, and enhance equipment performance across the steel production line.

Get a Quote or Engineering Support

Looking for oil-less bronze bushings for your steel plant or casting line?
Viiplus provides custom sizes and designs for:

• Continuous casters

• Rolling mills

• Slag breakers

• Handling equipment

• Foundry machinery

Contact Viiplus today to discuss your application requirements.