| Feature | Short Description |
|---|---|
| Wear-Resistant Material | Manganese steel (Mn13/Mn14) or alloy – hardness HB 200–250 (up to 550 after work hardening) |
| Main Function | Positions rocks for optimal crushing + absorbs impact from the movable jaw |
| Service Life | 6–12 months in heavy-duty quarries (30% longer than standard jaws) |
| Compatible Models | All jaw crushers (Blake, Dodge, PE/PEX series) – sizes 400×600 to 1200×1500 mm |
| Key Advantages | Stable crushing process + reduced vibration + 6-month warranty |
| Warranty & Delivery | 6-month replacement + free shipping across Iran |
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| Feature | Details |
|---|---|
| Product Name | Fixed Jaw Shoulder for Jaw Crushers |
| Material | X120Mn12 manganese steel (Mn13/Mn14) or SAE 8620 alloy steel with heat treatment |
| Surface Hardness | HB 200–250 (work-hardened up to HB 500–550 for impact resistance) |
| Thickness & Shape | Toothed design (optimized for crushing) – 100–300 mm depending on model |
| Standard Dimensions | Length 800–1800 mm, height 300–600 mm, width 150–300 mm (customizable) |
| Compatible Models | PE250×400, PE400×600, PE600×900, PE900×1200, PEX250×1000, Blake & Dodge (all Iranian/Chinese series) |
| Approx. Weight | 150–850 kg (PE600: 350 kg) |
| Load Capacity | Up to 200 tons/m² (suitable for Mohs hardness 5–8) |
| Service Life | 5,000–10,000 working hours (depending on rock hardness and maintenance) |
| Production Standard | ISO 9001 – precision casting + CNC machining |
| Warranty | 6-month full replacement (for cracks or abnormal wear) + 5-year after-sales support |
| Stock Availability | All models in stock + custom production in 10–14 days |
| Approx. Price 1404 | From 18 million Toman (PE400) to 85 million Toman (PE1200) – best cash and check prices |
| Competitive Advantage | 25% cheaper than imported jaws (e.g., Metso) + 40% higher durability in field tests |
The fixed jaw shoulder is a key component in jaw crushers, responsible for holding the rocks in place so the moving jaw can crush them effectively. This piece is stationary and works opposite the movable jaw shoulder, ensuring that the material is compressed properly between the two jaws during crushing. It is made from durable materials such as manganese steel or alloy steel, capable of withstanding high pressure and abrasion.
Functions of the Fixed Jaw Shoulder:
Positioning Rocks: Helps the movable jaw correctly position rocks for efficient crushing.
Pressure Resistance: Absorbs impacts from the movable jaw and crushed materials.
Stability: Being stationary, it maintains the stability of the crushing process.
Features and Construction:
Manufactured from materials resistant to abrasion and heavy loads, typically manganese steel with high wear resistance.
Designed to endure all applied forces without cracking or breaking.
Signs of Wear or Damage:
Reduced crusher performance: if worn, the crusher loses efficiency.
Excessive wear: thinning surfaces or visible cracks indicate replacement is needed.
Unusual noise: malfunctioning fixed jaws can produce abnormal sounds during operation.
Causes of Failure:
Hard materials: Extremely hard rocks or metals can damage the jaw.
Prolonged use: Continuous operation accelerates wear.
Improper maintenance: Incorrect lubrication or installation can shorten the component’s life.
FAQ – Fixed Jaw Shoulder:
What is a fixed jaw shoulder and its role?
It is the stationary wall of the crusher that holds rocks against the moving jaw, providing optimal positioning for crushing. Without it, the process becomes unstable.
When should it be replaced?
Replace when more than 20–30% of the surface is worn, cracks appear, or production drops over 15%. Signs include unusual noise or excessive vibration.
Difference between fixed and movable jaws:
The fixed jaw absorbs the main crushing force and moves less, while the movable jaw applies impact. Fixed jaws last up to 2× longer.
Best material for hard iron ore:
Mn14 manganese steel with high work-hardening – up to 50% higher impact resistance than standard alloys.
Does Iranian fixed jaw match imported quality?
Yes, Novinsm produces with precise casting and CNC machining, delivering Metso/Sandvik quality at ~30% lower cost.
How long does custom fixed jaw production take?
Standard models available with 48-hour delivery; custom jaws in 10–14 days, faster than importing.
How to prevent premature wear?
Regular lubrication, proper jaw gap adjustment (5–10 mm), and using uniform rocks can increase lifespan by 50%.
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