Overview
The main frame is the primary structural housing of a Symons cone crusher, cast as a single heavy steel casting with integral reinforcing ribs. It supports and aligns all internal crusher components including the eccentric bushing, main shaft, drive pinion shaft, bowl bearing and adjustment ring, and transfers crushing forces to the concrete foundation through its base mounting.
Our main frames are cast from ZG270-500 or ZG35CrMo high-strength cast steel , with bearing bores, mounting faces and bolt holes CNC-machined to precise tolerances. Post-casting stress relief treatment ensures dimensional stability, and non-destructive testing verifies casting integrity.
Quality & Application
Each main frame passes comprehensive inspection including dimension verification, non-destructive testing (UT/MT) and surface quality assessment before shipment. Anti-rust primer and industrial paint are applied for corrosion protection during storage and transit.
Standard main frames are manufactured for all common Symons spring cone crusher sizes. Custom dimensions, mounting patterns and reinforcement designs are available for specific crusher configurations and foundation requirements. As the most critical structural component, a properly manufactured main frame is the foundation for crusher reliability, alignment and long service life in mining and quarry operations.
Key Features
- Heavy Cast Steel: ZG270-500 or ZG35CrMo cast steel provides maximum structural strength and vibration damping.
- Reinforced Rib Design: Integral reinforcing ribs distribute crushing loads evenly and resist frame deformation.
- Precision Machined: CNC-machined bearing bores, mounting faces and bolt holes ensure proper component alignment.
- Stress Relieved: Post-casting stress relief treatment eliminates residual stresses for long-term dimensional stability.
- NDT Inspected: Non-destructive testing ensures casting integrity with no hidden cracks or porosity.
- Custom Configurations: Custom dimensions, mounting patterns and reinforcement designs for specific crusher models.
Compatible Machines
Fits Symons Cone Crusher (2ft / 3ft / 4.25ft); Symons Cone Crusher (5.5ft / 7ft); Spring Cone Crushers (Custom Fit Available).
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