A Jaw Crusher is a primary crushing machine widely used in mining, quarrying, construction, and recycling industries. It reduces large rocks into smaller aggregates by applying compression and shearing forces between a fixed jaw plate and a movable jaw plate inside a V-shaped crushing chamber.
For most crushing plants, jaw crushers are the first and most critical step in size reduction - and the performance of the jaw plates directly determines production efficiency, wear cost, and equipment stability.
How a Jaw Crusher Works
The jaw crusher operates through a cyclic mechanical process:
- Material enters the chamber from the top.
- The eccentric shaft drives the movable jaw toward the fixed jaw.
- Material is compressed and fractured along natural weak planes.
- When the jaws separate, crushed material falls through the discharge opening.
- Continuous rotation enables uninterrupted crushing.
This motion simulates the chewing action of animal jaws, providing high crushing force with relatively simple mechanical structure.
The discharge size is adjusted by modifying the bottom opening, allowing operators to control final product size according to production requirements.
Jaw crusher nip angle diagram
α-Nip Angle, Sx-Stroke, e-Discharge Opening Width
Jaw Crusher Design Types
Modern jaw crushers are mainly classified into:
| Type | Characteristics | Application |
|---|---|---|
| Single Toggle | One toggle plate, overhead eccentric | Most common modern design |
| Double Toggle | Two toggle plates | Heavy-duty historical design |
| Blake Type | Pivot at top | High-capacity primary crushing |
| Dodge Type | Pivot at the bottom | Precise size control |
Single toggle jaw crushers dominate modern installations due to higher efficiency and simpler maintenance.
Typical Performance Ranges
According to industry standards and manufacturer specifications:
Feed size: 125 – 750 mm
Material strength: ≤ 320 MPa
Capacity: 1 – 1000 t/h
Discharge range: 10 – 300 mm
Motor power: 15 – 300 kW
These ranges are widely confirmed across MEKA, McLanahan, JXSC and ISO standards.
Why Jaw Plates Define Crusher Performance
Jaw plates are the only components directly exposed to crushing forces and abrasion. Their geometry controls:
- Nip angle
- Material flow
- Crushing efficiency
- Wear uniformity
- Product shape
Even a high-quality crusher body cannot perform correctly with inaccurate or unstable jaw plates.
How a jaw crusher works
DUMA Jaw Plates: Verified Manufacturing Advantages
DUMA is a direct factory manufacturer, not a trading company, operating a fully integrated 42,000 m² production facility with ISO 9001:2015 certification
.
OEM Model Compatibility
DUMA jaw plates are directly supported by in-house patterns for:
Metso C Series:
C63, C80, C95, C96, C100, C105, C106, C110, C120, C125, C140, C145, C160, C200
Sandvik CJ Series:
CJ408, CJ409, CJ411, CJ412, CJ612, CJ613, CJ615, CJ815
Check Availability in Duma 4,000+ Pattern Library
Available types include:
- Fixed jaw plates
- Swing jaw plates
- Standard teeth
- Quarry teeth
- Super grip teeth
- Sharp teeth
- Corrugated and flat profiles
Material Science Behind DUMA Jaw Plates
DUMA uses controlled high manganese steel grades:
Mn13Cr2
Mn18Cr2
Mn22Cr2
Optional TiC insert reinforced versions
Through water toughening heat treatment, DUMA ensures:
Initial hardness ≈ HB200
Work-hardening surface hardness ≥ HB500
Fully austenitic microstructure
No network carbides (verified by metallographic testing)
This structure allows the jaw plate to become harder during operation while maintaining internal toughness, preventing brittle fracture.
Dimensional Accuracy and Installation Safety
With more than 4,000 OEM patterns, DUMA ensures:
- OEM dimensional tolerance compliance
- Precision machined seating surfaces
- 100% fit accuracy
- No site grinding required
- Reduced bolt loosening and frame damage risk
Customers consistently report "ready-to-install" performance.
Service Life and Wear Behavior
According to customer feedback and field performance:
- Average service life is 20–40% longer than standard market products
- Wear remains uniform
- Tooth profiles maintain crushing efficiency
- No early cracking or chunk breakage
Jaw crusher plates
Applications Worldwide
DUMA jaw plates are widely used in:
- Gold, copper, iron ore mining
- Quarry aggregate production
- Concrete recycling
- Asphalt recycling
- Mobile crushing plants
They are currently supplied to customers in Australia, South Africa, the USA, and Europe
Wholesale Supply and Delivery Capability
Monthly capacity: approx. 1000 tons
Standard models in stock: 7–10 days delivery
Customized orders: 30–45 days
Flexible MOQ for trial orders
Door-to-door export logistics supported
Technical Support and After-Sales
DUMA provides:
01
Material selection consultation
02
Tooth profile optimization
03
Installation guidance
04
Inversion strategy recommendations
05
12-month casting defect warranty
06
24/7 technical support
How to Choose the Right Jaw Plates
When selecting jaw plates, consider:
- Material hardness and abrasiveness
- Crusher model and chamber geometry
- Production target
- Climate conditions
- Wear pattern feedback
DUMA engineers assist customers in matching material grade and tooth profile to actual working conditions.
Jaw crusher wear parts are ready to ship
Conclusion
A jaw crusher is only as reliable as the jaw plates installed inside it.
By combining:
- OEM-matched chamber geometry
- Advanced metallurgy
- Precision machining
- Strict metallographic control
- Stable mass production
DUMA helps customers achieve:
- Longer liner life
- Stable crushing output
- Lower cost per ton
- Safer machine operation
Looking for OEM-Compatible Jaw Plates?
DUMA supplies jaw plates and tooth plates compatible with Metso, Sandvik, and other major brands with proven quality control and global supply capability.
Contact Duma to receive technical support, quotation, and model confirmation for your jaw crusher.
