Heavy-Duty Arm Bushing for Single-Cylinder Cone Crushers

Precision Engineered by NMS – The Pivot Point of Reliability

Compatible with Metso HP/GP, Sandvik CH/CS Series & E Crushers

Engineering Breakthroughs

► Ultra-Low Wear Design

• Material Science: Bimetallic composite structure

• Outer layer: High-strength forged steel (HB 280-320)

• Inner layer: Self-lubricating bronze alloy (CuZn25Al6)

• Wear Rate: <0.05mm/1,000 hours in abrasive granite crushing

► Vibration Suppression

• Helical Oil Grooves: Patented helix geometry maintains continuous oil film

• Damping Capacity: Reduces eccentric shaft vibrations by 65% (ISO 10816-3 verified)

► Precision Alignment

• CNC-machined concentricity tolerance: <0.03mm

• Pre-embossed installation alignment marks eliminate mounting errors

Performance ComparisonParameterNMS BushingConventional Bushing

Max. Load Capacity	180 MPa	120 MPa
Operating Temp.	-30°C to +150°C	-10°C to +100°C
Re-lubrication Interval	800 hours	200 hours
Impact Absorption	38 Joules	22 Joules

Customer Value Proposition

▣ 72% Longer Service Life

• Validated in Chilean copper mine: 14 months continuous operation vs. industry average 8 months

▣ 40-Minute Replacement

• Split design with tapered locking collars eliminates hydraulic press re

▣ Zero Run-in Damage

• Pre-lubricated with EP-2 lithium complex grease (embedded reservoir technology)

Applications

• Primary & Secondary Crushing Stations

• High-tonnage Aggregate Plants

• Tramp Iron Recovery Systems

NMS Commitment to Crushing Efficiency
Backed by metallurgical lab reports and FEA simulation data.
Complements NMS Top Shell Assemblies & Mantle/Concave Systems.