9449‑3557 Head/Shaft Assy for Symons 7ft STD Cone Crusher
The Symons 7ft STD spring cone crusher is a well‑known heavy‑duty secondary & tertiary crushing machine widely used in large‑scale mines, quarry and aggregate processing sites for crushing hard ore, granite, basalt and other abrasive rock materials.
As the core rotating assembly inside Symons 7ft STD cone crusher, the 9449-3557 Head/Shaft Assy consists of integrated cone head and main shaft. It is driven by eccentric bushing to generate gyratory swing motion during operation. The mantle is directly mounted onto the cone head of this assembly to complete material compression and crushing. Damaged or deformed head/shaft assembly will cause abnormal vibration, misalignment of internal bronze bushings, gear wear and further expensive secondary damage to the whole cone crusher.
To maintain continuous stable production of Symons 7ft STD cone crusher, high‑quality replacement structural spare parts are essential. SAIKUANG provides full‑range OEM‑interchangeable spare parts for Symons 7ft STD cone crusher, including head/shaft assembly, mantle, bowl liner, eccentric bushing, socket liner, step plate, gear sets, counter‑shaft assembly and related sealing kits.
Symons 7ft STD Cone Crusher Partial Spare Parts List
| Part Number |
Part Description |
| 9449-3557 |
HEAD/SHAFT ASSY |
| 4830-7378 |
BOWL LINER |
| 8642-8351 |
COUNTER WEIGHT |
| 2206-8500 |
COUNTERSHAFT BOX BUSHING |
| 5598-8781 |
FEED PLATE |
| 3682-9233 |
GEAR |
| 2214-6721 |
INNER ECCENTRIC BUSHING |
| 5168-8131 |
MAIN SHAFT NUT |
| 7320-8011 |
MAINSHAFT SLEEVE |
| 2214-8401 |
OUTER ECCENTRIC BUSHING |
| 2214-7561 |
OUTER ECCENTRIC BUSHING |
| 3682-7652 |
PINION |
| 4830-7379 |
SH BOWL LINER, MED. |
| 2618-8161 |
SH FEED CONE |
| 3041-8357 |
SH FEED DISTRIBUTOR |
| 4830-7581 |
SH HD BOWL LINER, fine |
| 6194-0017 |
SH LOCK NUT WEAR RING |
| 6273-7151 |
SH LOCKING NUT |
| 6273-8201 |
SH LOCKING NUT |
| 2748-4501 |
SH LOCKING NUT COVER |
| 5013-9285 |
SH MANTLE |
| 7381-9576 |
SOCKET |
| 4872-8485 |
SOCKET LINER |
| 4872-8520 |
SOCKET LINER |
| 6380-9190 |
SOCKET SEALING RING |
| 6380-8161 |
SOCKET SEALING RING |
| 4830-9471 |
BOWL LINER |
| 4830-9100 |
BOWL LINER |
| 4830-8608 |
BOWL LINER MEDIUM |
| 4830-8556 |
BOWL LINER, COARSE |
| 4830-9741 |
BOWL LINER, MEDIUM |
| 8642-8350 |
COUNTER WEIGHT |
| 3806-9061 |
COUNTERSHAFT ARM GUARD |
| 2618-7681 |
FEED CONE |
| 5598-8154 |
FEED PLATE |
| 5013-8401 |
LOWER MANTLE |
| 5168-7373 |
TEAR DROP NUT |
| 6391-5181 |
STD TORCH RING |
| 6391-5481 |
STD TORCH RING |
| 5013-8201 |
STD UPPER MANTLE |
| 6361-7151 |
STD WATER BAFFLE RING |
| 2618-8163 |
SYM FEED CONE |
| 4537-6961 |
COUNTER SHAFT BOX |
| 3806-8781 |
ARM GUARD |
| 3114-4262 |
7ft ECCENTRIC |
These Symons 7ft STD cone crusher spare parts cooperate with each other to bear heavy crushing force, protect crusher frame and transmission assemblies, and guarantee stable particle size of final crushed products. The head/shaft assembly undertakes major gyratory swing load; manganese mantles and bowl liners bear direct rock impact and compression; bronze bushings provide sliding bearing support; gear sets transmit power from motor to eccentric mechanism.
Degradation of 9449-3557 Head/Shaft Assy is mainly caused by long‑term cyclic stress, heavy impact load and improper feeding conditions. Timely inspection and replacement prevent severe equipment failure and costly mine‑site shutdown.
Material Options for 9449-3557 Head/Shaft Assy
Saikuang Casting manufactures replacement parts for the 9449-3557 Head/Shaft Assy with the following material grades, selected according to your raw rock abrasiveness and operating conditions:
- Manganese steel Standard alloy for mantles and bowl liners. It features outstanding work-hardening properties, perfectly suited for general rock crushing applications.
- Titanium carbide (TiC) reinforced manganese steel TiC particles are embedded inside the manganese steel matrix. It delivers superior abrasion resistance for sites processing highly abrasive stone.
- Chrome iron High-chrome cast iron with excellent wear resistance, commonly used for fine crushing scenarios.
- Ceramic chromium iron Ceramic particles are added into the chrome iron base, further boosting wear performance under severe abrasive working conditions.
- Martensitic steel Combines high hardness and reliable impact resistance, widely adopted for heavy-duty mining sites.
- Ceramic martensitic steel Premium composite ceramic martensitic alloy, engineered for the toughest and most abrasive crushing environments.
All these alloys go through precision casting and professional heat treatment. Our replacement parts match the original Symons 7ft STD cone crusher dimensions strictly for direct installation.
Why Choose SAIKUANG Casting
For 9449-3557 Head/Shaft Assy for Symons 7ft STD Cone Crusher, SAIKUANG offers:
OEM‑Level Dimensional Interchangeability: 100% match original drawing dimensions and mounting interface, guarantee perfect concentricity for eccentric group and mantle fitting. No on‑site machining required.
Qualified Forging & Heat Treatment: Each batch adopts strict raw‑material inspection and heat‑treatment process to obtain required mechanical property, resisting deformation and fatigue under heavy mining load.
Custom Manufacturing Support: We accept custom production per customer drawings or OEM part numbers for non‑stock heavy structural assemblies.
Competitive Aftermarket Price: As direct casting & forging manufacturer, we provide favorable cost without sacrificing quality.
Reasonable Lead Time: For standard heavy structural assemblies we arrange production schedule to shorten customer equipment downtime.
Contact Us
If you are sourcing reliable 9449-3557 Head/Shaft Assy and full set Symons 7ft STD cone crusher spare parts including mantles, bowl liners, eccentric bushings, socket liners, step plates, gear sets and counter‑shaft assemblies — SAIKUANG Casting is ready for technical consultation and formal quotation.
Your Reliable Partner for Crusher Spare Parts
Email: infosk@skpremiumcasting.com
Tel: 0086‑17351780508
