What Eccentric Bushes Do In A Crusher
An eccentric bush is a working sleeve that supports the main shaft movement in a crusher and helps turn rotary motion into the crushing action the machine needs. It is a wear part, so the fit, surface finish and inside dimensions matter as much as the casting quality. If the bush is scored, oval, cracked or worn beyond tolerance, the crusher can run hot and lose proper alignment.
We list surplus eccentric bushes for quarries that want a workable part without waiting on long lead times. Each item is checked before it is added to the exchange stock, so the buyer gets a clearer view of the part's condition and the seller can move surplus stock on in a practical way.
Sizes, Fits And Options We Handle
Eccentric bushes are not one-size-fits-all. They vary by crusher model, shaft diameter, overall height, wall thickness and lubrication groove layout. We handle surplus bushes in different diameters and length ranges, including parts for smaller quarry units and heavier duty primary crushers used on mine sites.
- Inside diameter matched to the shaft size
- Outside diameter and overall height for the crusher frame
- Keyway, groove and port arrangements where applicable
- Bronze and other metal compositions depending on the machine
- Left-hand or right-hand orientation where the design requires it
When a part is measured properly, it saves time on site. A bush that is a few millimetres out can cause fitting delays, extra machining, or premature wear once the crusher is back in service.
Where Eccentric Bushes Suit Quarry And Mine Work
These bushes suit cone crushers and similar machines used in hard rock, aggregate and mineral processing. They are commonly needed where steady throughput matters and where shutdown windows are short. In Mpumalanga coal operations, North West hard rock plants and Northern Cape mine sites, teams often keep a spare ready because breakdown time costs more than the part itself.
We see demand from quarries around Middelburg, eMalahleni and Secunda, as well as from Rustenburg, Polokwane, Kathu and Pietermaritzburg. Coastal humidity can affect stored metal parts too, so good storage and wrapping makes a real difference when a bush needs to sit for a while before use.
Inspection, Storage And Condition Reporting
Before an eccentric bush is listed, it is checked for visible scoring, pitting, heat marks and dimensional condition. We also look at whether the running surface is even, whether there is excessive ovality, and if the part shows signs of seizure or poor lubrication. That helps buyers decide whether the bush is suitable for direct fitment, reconditioning or scrap-versus-exchange.
- Visual inspection for cracks, scoring and galling
- Measurement against available dimensions and tolerances
- Condition report for resale, exchange or shutdown planning
- Storage in our yard with packing to limit dirt and moisture
- Collection and packing for local or nationwide dispatch
Our Middelburg Yard team manages storage, palletising and packing, with inspection coordination handled before release. That keeps surplus parts organised and easier to match to the right machine.
Installation Notes And Power Requirements
Eccentric bushes do not need a power supply or gas connection themselves, but they must be installed correctly to support the crusher drive and lubrication setup. Installation normally takes place during a planned shutdown and should include cleaning, checking the housing, confirming bearing surfaces and setting the correct lubrication path. If the crusher has been running dry or with dirty oil, the new bush can be damaged quickly.
Fitment checks are important before the machine goes back online. The bush must sit square, the shaft must turn freely and the lubrication system must be ready before start-up. On many sites, a rushed installation after loadshedding or during a short maintenance window can lead to avoidable rework, so it pays to allow enough time for proper alignment.
Care, Servicing And Storage Between Shutdowns
Good care starts with clean oil, correct alignment and regular checks for wear. If a bush is removed and stored, keep it wrapped, dry and off bare ground. Rust, dust and humidity can affect the surface finish, especially in yard storage near the coast or in open quarry yards where fine dust gets everywhere.
- Keep lubrication clean and on schedule
- Check for noise, heat and vibration after start-up
- Inspect for scoring during planned shutdowns
- Store surplus bushes on pallets and under cover
- Mark the part number, dimensions and machine type clearly
Our yard and storage process is set up for this kind of part, with palletising, packing and controlled holding periods before collection or delivery. That helps quarries manage working stock without cluttering site stores.
What To Check Before You Order
When you enquire, give us the crusher model, part number if available, and the main measurements from the old bush or machine drawing. The more accurate the details, the easier it is to match the correct item and avoid a costly mismatch. If the old part is worn, send the measured size as well as the nominal size so we can compare properly.
- Crusher make and model
- Part number or casting number
- Inside and outside diameter
- Overall height or length
- Orientation, groove layout and lubrication details
- Whether the part is for direct fitment, exchange or scrap assessment
Clients contact us through the enquiry form on our contact page, and our team responds with stock details, condition notes and delivery options. From Middelburg to mines and quarries across South Africa, Crusher Spare Exchange helps keep usable spares moving where they are needed most.
Key facts
| Product type | Eccentric bush for crusher applications |
|---|---|
| Condition checks | Scoring, pitting, ovality and dimensional fit |
| Typical use | Cone crushers and similar quarry crushing machines |
| Material options | Bronze and other wear metal compositions |
| Supply format | Surplus listing, exchange, resale or shutdown sourcing |
| Delivery coverage | Middelburg base with nationwide delivery |
| Storage options | Yard storage, palletising and packing available |
