Symons Cone Crusher Technical Manual

Symons Cone Crusher

Profile

The Symons Cone Crusher is a high-performance machine optimized and improved from the original Symons design. It is widely used for secondary and fine crushing in mining, building materials, metallurgy, and related industries. The Symons cone crusher handles materials with medium to high hardness, including metal ores, basalt, granite, limestone, cobblestone, and sandstone.

Design features

Tramp release system — automatically lifts the bowl when uncrushable material enters. Resets to the original CSS without operator intervention. Hydraulic lifting mechanism for liner changes and chamber clearing.

High eccentric throw combined with an optimized crushing chamber profile. Laminated crushing produces cubic product with fewer elongated particles.

Wear-resistant materials in key contact surfaces. Positive-pressure dust seal on the main shaft. Robust lubrication circuit with oil temperature and flow monitoring.

Working Principle

The motor drives the eccentric bushing via V-belts, pulley, countershaft, pinion, and gear. The mantle rotates with the eccentric bushing, moving toward and away from the concave to crush material into smaller sizes.

Typical Flow Chart

Semifinished Silo

• Feeding
  • Circular Load
  • Note 1: Net Final Product (SCREENED)
  • Note 2: Tons per hour passing through crusher (net final product plus circular load)

Features of the Symons Cone Crusher

• High Performance: Optimal chamber design combined with appropriate speed and stroke enables more work from the same dynamic cone diameter — delivering better capacity compared to other cone crushers of the same class. The laminated crushing principle produces more cubic-shaped material with fewer needle-like particles.
• Excellent Product Shape: The laminated crushing action generates a higher proportion of cubic-shaped final products. Acicular and flake-shaped particles are minimized, resulting in a well-graded size distribution.
• Reliable Overload Protection: When non-crushable material enters the chamber, the tramp release system activates automatically and resets to the original setting once the material passes through — protecting the crusher from damage with zero manual intervention.
• Convenient Cavity Clearing: If the crusher stops under load, the hydraulic cleaning system quickly clears the crushing chamber, minimizing downtime.
• High Reliability: A large-diameter main shaft, heavy-duty main frame, and independent automatic thin-oil lubrication system ensure robust, dependable operation.
• Easy Maintenance: All components are accessible from the top and upper side for straightforward disassembly. Bronze bearings maintain excellent load capacity under high shock and vibration, and are more economical and easier to service than alternative bearing types.
• Low Production Costs: Large capacity, high reliability, and easy maintenance combine to significantly reduce operating costs per ton.
• Versatile Application: The Symons cone crusher adapts to every crushing stage — from extra-coarse to fine crushing — and suits both stationary and mobile plant configurations. Multiple crushing chamber profiles are available to match your specific process requirements.
• Separate Lubrication System: Independent oil circulation ensures clean, temperature-controlled lubrication for all critical bearings.

Sketch of the cavity between standard and short head type

Standard

Short head

Main Specifications

Specification chart in open circuit (STANDARD)

Main Specifications

Specification chart in open circuit (SHORT HEAD)

Main Specifications

Specification chart in closed circuit (STANDARD)

Main Specifications

Specification chart in closed circuit (SHORT HEAD)

Machinery dimension(mm)

Weight list(kg)

Structure

• Feed hopper
• Bowl hopper
• Adjustment cap seal
• Feed cone
• Cover plate
• Torch ring
• Main shaft sleeve
• Bowl
• U-shaped bolt and washer
• Adjustment ring dust collar
• Bowl liner
• Mantle
• Head
• Socket sealing ring
• Gear
• Arm guard
• Pinion thrust washer
• Pinion
• Inner eccentric bushing
• Eccentric
• Outer eccentric bushing
• Main frame
• Step bearing plates
• Main frame cap
• Feed plate
• Main shaft nut
• Adjustment cap
• Main frame pin
• Adjustment ring
• Upper spring segment
• Spring
• Spring bolt
• Socket liner
• Main frame liner
• Lower spring segment
• Socket
• Countershaft box guard
• Oil flinger
• Crusher sheave
• Sheave taper sleeve
• Countershaft
• Outer countershaft bushing
• Oil flinger housing
• Countershaft box
• Inner countershaft bushing
• Countershaft box seal
• Main shaft

The Lubricating System

Since the friction surface receives much pressure, lubrication is very important to the crusher. The crusher is centrally lubricated with watery oil.

Oil route

There are two routes for the oil to enter the machine,

• one is through the oil hole at the bottom of the crusher, then to the hollow eccentric shaft surface, bowl-shaped bearing and the big and small gears through 3 separate ways.
• The other is through the hole in the transmission shaft support, then to the transmission bearing. The return route is a spill hole at the bottom of the small bevel gear and another spill hole in the dust-proof cover.

Adjustment and locking of hydraulic system

• Start thin oil station before start the main unit, if the lubrication system is ok, start the main unit, then start the vibrating feeder if the machine running normal without load. Stop feeding before stop crusher, ores in crushing chamber is exhausted totally, stop the main unit, and stop the thin oil station at last.
• Before start the thin oil station, open relative oil valve and switch, adjust the pressure adjust device, keep the pressure between 0.04-0.1MPa, the oil temperature should be in 30-40°C, if the temperature is too low, start the resistance heater first.
• Please refer to the electricity control cabinet instruction for all electric switch function. And put them in proper position before start the main unit.

Problem and solution