Spherical Seat Liner for Cone Crushers
Custom spherical seat liners cast in tin bronze and aluminum bronze for cone crusher main shafts, machined to drawing for stable sliding bearing support.
A spherical seat liner (also called a spherical bearing liner or spherical seat) sits between the main shaft and the crusher frame, carrying the vertical load while allowing the shaft to tilt slightly during crushing. It belongs to the sliding bearing family: the shaft rotates against the liner under a lubricated film, so the two surfaces are separated by oil rather than running in direct metal-to-metal contact. In cone and gyratory crushers this arrangement keeps the machine steady, quiet and tolerant of the heavy, uneven loads that come with hard rock.
Design and materials
Spherical seat liners are cast as a matched pair with the spherical surface that mates to the shaft seat, then machined so the radius and contact pattern suit the crusher model. Common choices include C93200 (SAE 660) tin bronze for general service, C93700 where dirt or grit is present, and C95400 aluminum bronze where impact and abrasion are heavier. The alloy is selected against load, speed, lubrication and the material being crushed rather than by a single "most wear-resistant" grade.
- Spherical radius machined to match the shaft seat
- Oil grooves and lubrication passages formed to drawing
- Tin bronze and aluminum bronze options
- Cast and machined as one part, no assembly joints
Typical applications
These liners are used in cone and gyratory crushers, and in other heavy equipment where a shaft must be supported while allowing a small amount of self-aligning movement. Related parts in the same assembly include socket liners and eccentric bushings, which together form the crusher's bronze bearing set. Similar sliding-bearing components are used in mining and quarrying equipment such as crushers, mills and screens.
Manufacturing and inspection
We cast spherical seat liners by centrifugal, sand or metal mold casting depending on size and quantity, then machine them in-house to the customer's drawing. Each heat is checked by spectrometer for composition, and hardness is tested before shipment. We also work from worn samples, reverse engineering the original geometry and matching the original alloy where a drawing is not available.
Send your drawing or a worn sample for a free evaluation.
Materials
Procurement facts
| MOQ | Samples from 1 pc; batch orders quoted per drawing |
|---|---|
| Tolerance | Machined to drawing tolerances |
| Lead time | Confirmed at quotation, per drawing and quantity |
Specifications
| Material | C93200 (SAE 660) tin bronze, C93700, C95400 aluminum bronze, or custom alloy |
|---|---|
| Casting process | Centrifugal casting, sand casting or metal mold casting |
| Size range | Castings from 20 mm to 6000 mm diameter, 0.1-15000 kg; made to drawing |
| Machining | In-house CNC machining to drawing |
| Inspection | Spectrometer composition check, hardness testing |
| Customization | OEM, per drawing or sample |
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View DetailsRequest a Quote
Tip: include the machine brand/model, OEM part number and photos of the worn part if available.