For miners, quarry operators, and aggregate producers working with hard, abrasive rocks like granite, basalt, or diabase, a reliable secondary crusher is the backbone of your production line. If you’re in the market for a stone crusher that delivers high capacity, consistent particle shape, and long service life, look no further than the Symons Cone Crusher 5 1/2 Feet STD Extra Coarse. It is engineered for heavy-duty applications where extra-large feed sizes and high throughput are non-negotiable. In this blog, we’ll break down why this crusher is a top choice for serious operators, its key features, real-world applications, and what makes it worth your investment.
What Is the Symons 5 1/2 Feet STD Extra Coarse Cone Crusher?
The “5 1/2 Feet” refers to the diameter of the crusher’s cone mantle (1650mm), a key indicator of its capacity and feed handling capability. The “STD” (Standard) designation means it’s designed for secondary crushing, bridging the gap between primary jaw crushers and fine crushing equipment.
“Extra Coarse” defines its crushing chamber profile: optimized to accept larger feed sizes (up to 127mm) and produce coarse to medium aggregates (typically 25-50mm), making it ideal for hard rock operations that need high-volume intermediate crushing.
Core Specifications
● Cone Diameter: 5 1/2 feet (1650mm)
● Feed Opening (Extra Coarse Chamber): 127mm (max feed size)
● Capacity: 100-250 TPH (tons per hour), depending on material hardness and feed size
● Crushing Ratio: Up to 8:1 (excellent for reducing hard rock from primary crushing)
● Motor Power: 250kW
● Application: Secondary crushing of hard, abrasive rocks (compressive strength ≤350MPa)
Key Features That Make This Crusher Stand Out
The cone crusher 5 1/2 Feet STD Extra Coarse model packs features that solve real pain points for miners and quarry operators:
1. Robust Design for Hard Rock Abuse
Hard rocks like granite or basalt don’t just test your crusher—they punish inferior equipment. The Symons 5 1/2 Feet crusher is built to withstand the abuse:
● Welded Steel Frame: A heavy-duty, one-piece welded frame minimizes vibration and flexing during high-impact crushing, extending the crusher’s service life.
● Manganese Steel Wear Parts: The cone mantle and concave (the two key crushing surfaces) are made from high-grade Mn13Cr2 manganese steel, known for its exceptional toughness and abrasion resistance. These parts last 30-50% longer than standard steel in hard rock applications, cutting down on replacement costs and downtime.
● Sealed Lubrication System: Dust and debris are the enemies of crusher bearings. Symons’ proprietary sealed lubrication system keeps contaminants out, ensuring smooth operation even in dusty quarry environments.
2. High Capacity & Consistent Throughput
For mining and quarry operations, time is money—and downtime kills productivity. The 5 1/2 Feet STD Extra Coarse model is engineered for maximum throughput:
● Extra Coarse Chamber Profile: The deep, extra-coarse chamber accepts larger feed sizes (up to 127mm) from primary jaw crushers, reducing the need for pre-screening and ensuring a steady flow of material.
● Eccentric Throw Optimization: The crusher’s eccentric throw (adjustable) is tuned to deliver powerful crushing force while maintaining high capacity. Even with hard, dense rock, it consistently hits 100-250 TPH—perfect for medium to large-scale operations.
● Steady Particle Size: Unlike some crushers that produce inconsistent gradation, Symons’ uniform crushing action results in evenly sized aggregates, reducing the load on downstream screens and improving final product quality.
3. Easy Maintenance & Low Operating Costs
Mining equipment shouldn’t require a team of engineers to maintain. The Symons 5 1/2 Feet model is designed for accessibility:
● Hydraulic Adjustment System: Changing the discharge setting (to adjust product size) is quick and easy with the hydraulic system—no manual shimming required. This saves time during product changeovers.
● Accessible Wear Parts: The cone mantle and concave can be replaced in hours, not days, thanks to the crusher’s modular design. Most maintenance tasks can be completed on-site by your existing team.
4. Versatility for Multiple Applications
While it’s optimized for hard rock secondary crushing, the 5 1/2 Feet STD Extra Coarse model is surprisingly versatile:
● Swap out the extra-coarse concave for a standard or fine chamber to produce smaller aggregates (10-25mm) if your project needs change.
● Works with a range of materials, including granite, basalt, diabase, iron ore, and quartzite—making it ideal for quarries, mining operations, and large-scale infrastructure projects.
Final Thoughts
If you’re in the market for a secondary crusher that can handle hard, abrasive rocks, deliver high capacity, and keep operating costs low, the Symons Cone Crusher 5 1/2 Feet STD Extra Coarse is the solution you’ve been searching for. Contact US today for a customized quote, technical drawings, or references from other operators in your region. Your production line (and your bottom line) will thank you.
2025-11-29
86-15093113821
86-15093113821
