jaw crusher parts
Jiangxi Duma Machinery Manufacturing Co., Ltd. is one of the most credible manufacturers and suppliers of jaw crusher parts in China. Welcome to buy discount jaw crusher parts in stock here and get quotation from our factory. We also accept customized orders.
Duma Machinery - Professional Manufacturer of Jaw Crusher Parts
Jaw crusher parts - fixed and movable jaw plates - are manufactured by Jiangxi Duma Machinery Manufacturing Co., Ltd. in high-manganese steel (Mn13Cr2, Mn18Cr2, Mn22Cr2) and alloy upgrades, covering 4,000+ OEM patterns for Metso, Sandvik, Terex, Telsmith, and more. All products are cast, heat-treated, and inspected in-house at our 42,000 m² facility, with full material and dimensional documentation included. Stock items ship in 7–10 days; custom castings in 35–45 days.
Working Principle of the Jaw Crusher
Jaw crushers are widely used in the primary crushing process in industries such as mining, building materials, and infrastructure. The crushing action occurs between two high-manganese plates, regardless of whether they have "teeth" or not. These teeth are referred to as the jaw plates or jaw dies:
● Fixed Jaw Plate: Vertically installed on the front wall of the frame, forming the static working surface of the crushing chamber. It comes in two designs: one-piece and split, both of which are highly reliable.
● Movable Jaw Plate: Driven by an eccentric shaft, it connects with the toggle plate to form the dynamic crushing surface. The movable jaw comes in two designs: one-piece and split, and is made from high-manganese steel.
These two components create a wedge-shaped crushing chamber that achieves an efficient "large feed, small discharge" crushing mode. High-quality crusher jaw dies significantly improve the crushing ratio and extend the life of the equipment.
Advantages of One-Piece Jaw Dies Design：
● Faster jaw die replacement – reduces downtime
● Fewer parts – no need for a center wedge
● Easy to install – suitable for maintenance in limited spaces and mobile applications
Advantages of Two-Piece Jaw Dies Design：
● Longer expected service life (when replaced as recommended)
● Reduced waste rate and cost per ton
● Equipped with standard lifting tools for the crusher
● By rotating the jaw dies as recommended, a good bite angle can be achieved
Jaw Crusher Parts – Jaw Plate Types, Features, and Applicable Working Conditions
|
Type |
Features |
Suitable Conditions |
|
Flat Jaw Plate |
General design, cost-effective |
Crushing of medium to low hardness materials |
|
Corrugated Jaw Plate |
Anti-slip design, strong grip |
Handling of sticky/wet materials |
|
Reinforced Tooth Jaw Plate |
Titanium alloy reinforced tips, good impact resistance |
Soft to medium-hard materials; improves bite and feed grip |
Jaw Crusher Manganese Liners
Jaw plates and cheek plates are the most common wear parts and need frequent replacement. Duma Machinery manufactures jaw plates in various tooth shapes and materials based on your requirements.
Typical metallurgical options:
● Jaw Crusher Plate Material: Mn13Cr2, Mn18Cr2, Mn22Cr2
Jaw crusher parts can also be customized with special requests, such as titanium carbide inserts or added molybdenum, among other options.
|
Material |
Mn (%) |
C (%) |
Cr (%) |
P (%) |
S (%) |
Si (%) |
Mo(%) |
Al(%) |
|
Mn13Cr2 |
12-14 |
1.10-1.3 |
1.5-2.0 |
≤0.055 |
≤0.025 |
0.4-0.6 |
/ |
/ |
|
Mn18Cr2 |
18-19 |
1.15-1.35 |
1.5-2.0 |
≤0.055 |
≤0.025 |
0.4-0.6 |
/ |
/ |
|
Mn22Cr2 |
21.5-23 |
1.20–1.35 |
1.5-2.0 |
≤0.055 |
≤0.025 |
0.4-0.6 |
/ |
/ |
We maintain the heat treatment records and chemical composition reports for every jaw plate we manufacture, ensuring traceable quality and reliable support for your machines.
Advantages of Our Jaw Plate Manufacturer
Extensive product supply
● Choose from custom designs or ready-made wear parts
● Competitive lead times
Technical Services
● Chamber drawings and analysis
● Assistance with alloy selection
● Chamber optimization
Crushing Expertise
● 10+ years of casting expertise
● In-house engineering
● In-house metallurgy
● Global manufacturing and on-site support
We provide OEM-quality jaw crusher parts alternatives for the following brands:
✓ Sandvik ✓ Metso ✓ Terex ✓ Pegson ✓ Pioneer ✓ Telsmith ......
Get Your Exclusive Solution Now:
Please provide your equipment model and working conditions, and our engineers will recommend the best crusher spare parts configuration within 2 hours, along with chamber optimization suggestions.
How to Order
Request a Quote
Submit your crusher model, jaw plate part number, or worn sample dimensions via our inquiry form - our engineers respond within 2 hours.
Custom Solutions
Provide drawings, worn samples, or OEM part numbers for reverse-engineering and OEM/ODM production.
Logistics
We ship EXW, FOB, and CIF worldwide, with full documentation (material certificate, dimensional report, heat treatment curve, MT/UT inspection report) included.
FAQ
Q: What is a jaw die?
A: A jaw die refers to the wear-resistant steel plates - fixed and movable - that form the crushing chamber of a jaw crusher. They apply compressive force to break material as it passes through the V-shaped chamber between the two plates.
Q: How do I know when to replace the jaw plates?
A: Replace the jaw plates when tooth wear reaches approximately 80% of the original profile depth, or when you notice a significant drop in crushing efficiency or an increase in product size inconsistency. For two-piece jaw dies, rotating or inverting the lower section when 50% worn can extend total service life.
Q: How should jaw plate bolts be checked after installation?
A: Re-torque all jaw plate mounting bolts within the first 48 hours of operation to compensate for initial seating. Loose bolts are typically caused by improper installation or insufficient pre-tensioning - not defective jaw plates. Ensure the jaw plate back surface is clean and in full contact with the frame before tightening.
Q: What material grades does Duma offer for jaw plates, and how do I choose?
A: Duma supplies Mn13Cr2, Mn18Cr2, and Mn22Cr2 as standard grades, plus TiC-insert and Mo-alloyed variants for extreme abrasion. As a general guide: Mn13Cr2 suits medium-hardness materials; Mn18Cr2 is recommended for harder or more abrasive ores; Mn22Cr2 and TiC-insert options are specified for high-impact, high-abrasion applications such as granite or iron ore. Contact our engineers with your ore type and crusher model for a specific recommendation.
Q: What is the lead time, and do you accept small trial orders?
A: Standard models (e.g., Metso C80–C160, Sandvik CJ411/CJ615) are held in stock and can ship within 7–10 days. Custom or non-standard castings typically require 35–45 days. Yes - we accept small trial orders for quality evaluation before committing to larger volumes.
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