Feature	Brief Description
Impact-resistant material	Manganese steel Mn13/Mn14 – work-hardened up to HB 550
Service life	4–10 months in heavy-duty quarries (20–30% longer than standard jaws)
Optimized teeth	Wave or flat design – better crushing, lower power consumption
Compatible models	All jaw crushers: PE, PEX, Blake, Russian & Swedish models
Weight & load capacity	200–1200 kg – impact resistance up to 250 t/m²
Warranty	6 months replacement + free shipping across Iran

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The movable jaw shoulder is a critical component of a jaw crusher, used for crushing rocks and minerals. It works in conjunction with the fixed jaw shoulder, positioning the material between the two jaws and crushing it through its back-and-forth motion. The material of the movable jaw shoulder is typically selected to withstand the high pressure and impact forces generated during crushing.

Feature	Description
Material	Manganese steel or wear-resistant alloys (e.g., Hadfield Manganese Steel) to withstand heavy pressure and impacts; custom options with alloy steel for special conditions.
Technical Specs	Various dimensions depending on jaw crusher model (from 60×100 to 110×90 cm); approximate weight 200–800 kg; compatible with domestic and international models like Godwin and Metso; wear surface thickness 50–100 mm.
Applications	Primary and secondary crushing of ores, limestone, granite, and hard materials in mining, cement, and construction industries; transfers force from the shaft to materials for crushing.
Unique Advantages	Optimized design for maximum crushing efficiency; easy replacement without complex tools; extends machine life by reducing fixed jaw wear; guaranteed quality with best market price.
Maintenance & Installation	Periodic inspection of wear surfaces (every 500 working hours); regular lubrication of edges with industrial grease; installation with standard bolts in under 1 hour; signs of wear: unusual noise or reduced material output.

Functions of the Movable Jaw Shoulder:

Crushing stones: Moves stones toward the fixed jaw shoulder to crush them efficiently.
Force transmission: Transfers the force generated by the motor to the stones for effective crushing.
Pressure generation: Creates the necessary pressure between jaws for material fragmentation.

Features of the Movable Jaw Shoulder:

Durable material: Typically made of manganese steel or wear-resistant alloys.
Optimized design: Engineered to maximize crushing efficiency.
Easy replacement: Can be replaced quickly if worn or damaged.

Signs of Wear or Damage:

Reduced machine efficiency: Worn movable jaw shoulder decreases crushing performance.
Unusual noise: Damage may cause abnormal sounds during operation.
Excessive wear: Prolonged use can wear the surface of the jaw.

Causes of Wear:

High pressure: Continuous impact with large or hard materials.
Friction: Constant contact with stones accelerates wear.
Poor maintenance: Incorrect lubrication or improper installation shortens service life.

Summary:
The movable jaw shoulder is a critical jaw crusher component responsible for crushing stones. Proper maintenance and periodic inspection enhance machine performance. Using high-quality, wear-resistant jaw shoulders prevents premature failure, reduces costs, and extends the crusher’s lifespan.

FAQ – Movable Jaw Shoulder:

Difference from fixed jaw shoulder: The movable jaw strikes directly and experiences more wear; its lifespan is typically 50–70% of the fixed jaw.
When to replace: Replace when tooth depth falls below 20 mm, production drops, or deep cracks appear.
Best tooth profile for basalt and granite: Wave-shaped teeth – better crushing and 10–15% lower energy consumption.
Quality of domestic vs. Swedish jaws: Novincsm manganese Mn14 jaws with precise CNC machining show field-tested life equal or higher than Swedish counterparts.
How to extend lifespan: Correct jaw gap adjustment, uniform feeding, avoiding metals, and regular lubrication can increase life by up to 40%.