Discover How Our Patented TH18 Micro-Fine Milling Drum That Lasts 40% Longer and Cuts Maintenance Time by 50%

This article dives deep into the toughest technical challenges of micro-fine milling operations — including dense cutter layouts, tight replacement spaces, and cutting high-density materials — and explains how Everpads' TH18 drum breaks through traditional limits with structural, material, process, and balancing innovations to redefine micro-fine milling drum standards.

Everpads' TH18 patented 6x2mm micro-fine milling drum, equipped with a proprietary quick-change structure and an all-new tool holder system, excels in the harshest conditions:

• 💰 Doubles the lifespan, saving customers tens of thousands of dollars in drum replacement annually

• 👷 Reduces tooth removal time by 60%, making on-site maintenance faster, safer, and more efficient

Who Will Benefit from This?

• Contractors running high-frequency surface milling jobs
• Fleet managers seeking lower maintenance and downtime
• Milling machine operators frustrated by stuck bits and manual labor inefficiencies
• Procurement teams looking to lower lifetime equipment costs without sacrificing cutting quality
  
  

Table of Contents:
1. Jobsite Scenarios: Typical Applications for Micro-Fine Milling
2. Engineering Demands: Challenges from Texture Density & Material Hardness
3. Six Core Technical Challenges in Precision Milling
4. TH18 Patented Drum — Complete Technical Solutions
5. Core Value Summary

I. Jobsite Scenarios: Typical Applications for Micro-Fine Milling

• Industrial roads: repeatedly subjected to heavy truck loads, requiring extremely durable sublayers
• Airport runways: demand precise layer removal to ensure new pavement adhesion and flight safety
• Port cement roads: require high flatness and texture depth to withstand massive weight and braking
• Highways: limited construction time, need high-quality milling done quickly

II. Engineering Demands: Challenges from Texture Density & Material Hardness

• 🛗 High-density texture requirements: Increase pavement resistance to high pressure, prevent slippage of newly paved asphalt layers, and improve structural bonding performance increase surface friction, prevent slipping, and improve pavement bonding
• 🧱 Harder milling materials: such as compacted asphalt and cement with strong physical properties
• 📏 Precise shallow milling: often 2–5 cm, requiring uniform depth and fine texture
  
  

These conditions demand drums that offer both high impact resistance, superior wear performance, and structural precision.

III. Six Core Technical Challenges in Precision Milling

1. High Resistance × High Force Cutting
   Dense cutter spacing increases surface contact area and torque/load resistance.
2. Smaller Tool Holders Require Higher Strength
   Reduced volume per holder increases impact per unit area, raising material strength demands.
3. Extreme Wear Challenge
   Frequent contact points elevate abrasive wear requirements on the holders.
4. Welding Precision Determines Service Life
   Minor angular deviation in dense layouts causes stress imbalance and early failure.
5. Dynamic Balance Is Critical
   High horsepower + high-speed rotation = any imbalance accelerates fatigue damage.
6. Narrow Tool Replacement Space
   Dense layout complicates manual tool changes, increasing labor time and injury risks.
   
   

IV. TH18 Patented Drum — Complete Technical Solutions

1. One-Piece Forged Tool Holders

• No welding or joints — fully forged structure
• Grain flow matches part contour, avoiding weld stress points
• Excellent integrity: 50%+ higher anti-crack and anti-deformation capacity
  
  

2. High-Strength Alloy Steel
+ Full Tempering Heat Treatment

• Proprietary alloy formulation boosts base mechanical performance
• Quenching + high-temp tempering ensures full internal uniformity
• "Hard surface + tough core" structure

3. Robotic 3D Arm Precision Tack Welding

• Before hardfacing, an automated 3D robotic arm handles initial welding
• Controls angle, direction, and spatial position to micron-level accuracy
• Ensures cutting path uniformity and reduces early failure risk from stress imbalance
• Guarantees consistent texture quality on pavement
  
  

Precision equals durability. Robotic welding is the foundation of micro-fine milling accuracy.

4. Six-Layer Hardfacing
— Prevent Cutter Misalignment by Long term Impacts

• After robotic tack welding, each holder is hardfaced in six continuous layers (vs. 3 in typical drums)
• Forms a compound reinforcement layer with balanced stress resistance
• Locks cutter angle and position, preventing misalignment under impact
• Avoids premature failure due to wear or holder shifting
  
  

5. Reinforced Rib Design
— Distributed Stress Management

• Frontal ribs: strengthen cutter mounting zone to resist axial & vertical impact
• Side ribs: enhance bending & torsional stiffness for overall stability
• Optimized root radius (R-fillets): eliminates stress concentration, extends fatigue life
  
  

6. High-Precision Dynamic Balancing
— No Drum Leaves Untested

• Each TH18 drum undergoes dynamic balancing calibration pre-shipment
• Ensures zero runout and low vibration at high RPM
• Reduces machine fatigue and improves service life
  
  

7. Patented Quick-Change System:
672 Cutters Replaced by Two Workers in 1.5 Hours

• Patent-pending quick-release cutter holes
• Compact-space design eliminates traditional dead angles
• ⏱ Over 50% time savings, 60% lower manual labor costs
  
  

V. Core Value Summary

• ⏱ Improved efficiency: faster tool changes, more flexible timelines
• 🛡 Extended lifespan: stronger structure, optimized materials
• 💰 Reduced costs: fewer replacements, less downtime, lower maintenance
• 🔧 Smoother operation: easier tool changes, safer work zones