Sandvik CH660 Cone Crusher Eccentric Assembly replacement part made of alloy steel

Sandvik CH660 Compatible Eccentric Assembly | High-Grade 34CrNiMo6 Alloy 452.4128

Material : 34CrNiMo6 Alloy Steel
Heat Treatment :Through-hardening and Tempering
Surface Hardness: HRC 38-42
Eccentric Throw 32mm (Standard)
Bearing Journal Tolerance h6 (ISO Standard)

库存 112 件

分类 Cone Crusher Parts 标签 Cone Crusher Parts Brand: NEWREG

Description

Part Number 452.4128 : Replaces OEM numbers for Sandvik CH660 (H6800) Series.

This Eccentric Assembly is engineered to restore the precise oscillating motion of your CH660 cone crusher. Unlike standard aftermarket crusher spares, our assembly is manufactured from forged 34CrNiMo6 (EN 1.6582) alloy steel, prioritized for high fatigue strength and resistance to cyclic bending stresses.

Designed for direct interchangeability, this component ensures strict adherence to the kinematic geometry required for the CH660 hydroset system, minimizing vibration and protecting the main frame assembly.

Technical Specifications & Metallurgy

Sandvik CH660 Eccentric Assembly with machined journal — Figure 1: Precision machined Eccentric Assembly for CH660 with ISO h6 bearing journals.

Technical Parameter	Engineering Specification	Performance Benefit
Material Standard	34CrNiMo6 (EN 10083-3)	High tensile strength (>1000 MPa) to resist shaft deflection.
Manufacturing Process	Open Die Forging + Q&T	3:1 Forging Ratio ensures refined grain structure vs. casting.
Surface Hardness	HBW 360-390 (Approx. HRC 38-42)	Optimized balance between wear resistance and core toughness.
Geometric Tolerance	ISO h6 (Journal) / IT6 (Bore)	Prevents “bushing spin” and maintains oil film integrity.
Run-out (TIR)	≤ 0.02mm	Reduces vibration transfer to the bottom shell.

Performance Comparison: Why Material Matters

In heavy-duty mining applications, the eccentric assembly acts as the crankshaft of the crusher. We have compared our forged 34CrNiMo6 units against standard cast steel alternatives often found in the generic crusher part suppliers market.

Fatigue Life: +45% increase in cycle life due to the Quenching and Tempering (Q&T) heat treatment process.
Load Capacity: Designed to withstand the crushing force of hard granite and basalt (up to 450 MPa compressive strength).
Thermal Stability: Stress-relief annealed to ensure dimensional stability even when operating oil temperatures exceed 50°C.

Engineer’s Note: Diagnostics & Maintenance

When should you replace the Eccentric Assembly?
As a critical component interacting with the Cone Crusher Liner and bushings, inspection is vital. Look for these specific indicators during your tear-down:

The “Finger Nail” Test: Inspect the outer bearing surface. If you can feel ridges or scoring with your fingernail (depth > 0.1mm), the hydrodynamic oil wedge cannot form, risking catastrophic bushing burn.
Bore Ovality: Measure the inner bore at 3 points. If ovality exceeds 0.05mm, the main shaft will tilt improperly, causing uneven wear on the mantle.
Discoloration: Blue or black heat tint marks indicate previous lubrication failure and changes in metallurgical structure.

Quality Assurance Protocol

Every eccentric assembly undergoes a 3-stage NDT (Non-Destructive Testing) protocol before shipping:

UT (Ultrasonic Testing): According to EN 10228-3 Class 3, to ensure zero internal forging bursts.
MT (Magnetic Particle): To verify surface integrity after final grinding.
CMM Inspection: Verification of the eccentric throw (32mm standard) and concentricity.

Ready to restore factory tolerance? Check current stock levels for CH660 wear parts.

REQUEST MATERIAL CERTIFICATE & QUOTE

“Authoritative Engineering Data: All critical metallurgical specifications and dimensional tolerances (e.g., ±0.05mm) are strictly governed by the master English documentation. While localized versions are provided for operational reference, the English original remains the sole binding authority for quality inspection and technical compliance.”