Motor Core 86642331 for Montabert HC50 Rock Drill

The motor core (part number 86642331) is a key component used in the hydraulic rotary motor of the Montabert HC50 rock drill. It plays an important role in generating and transmitting rotary power, helping the drill maintain stable rotation and smooth drilling performance under heavy working conditions.

This part works inside the hydraulic motor assembly and is directly involved in converting hydraulic energy into rotational movement. A good motor core helps improve torque output, reduce internal resistance, and maintain efficient operation during continuous drilling.

Manufactured from high-strength alloy steel, the motor core is precision-machined and heat-treated for better wear resistance and durability. It is designed to handle high hydraulic pressure, vibration, and long operating hours commonly found in mining and tunneling applications.

Product Details

• Part Number: 86642331
• Machine Model: Montabert HC50
• Product Name: Motor Core
• Application: Hydraulic rotary motor
• Material: High-strength alloy steel
• Condition: New replacement part

Main Features

• Precision-machined for stable motor operation
• Helps maintain smooth and efficient rotation
• Good resistance to wear and hydraulic pressure
• Strong alloy steel construction for long service life
• Suitable for continuous heavy-duty drilling work

Applications

Suitable for:

• Underground mining
• Quarry drilling
• Tunneling projects
• Construction drilling operations

Used in the hydraulic rotation system of the Montabert HC50 rock drill.

From Our Experience

When the motor core becomes worn, the rotary motor may lose torque, rotate unevenly, or generate abnormal heat and vibration. In some cases, this can also affect gears and bearings inside the motor assembly. Replacing worn motor parts in time helps avoid bigger repairs and keeps drilling performance stable.

Why Quality Matters

A high-quality motor core helps:

• Improve rotary motor efficiency
• Maintain stable torque output
• Reduce wear on internal motor components
• Extend service life of the hydraulic motor

For heavy drilling applications, reliable rotary motor parts are important for reducing downtime and keeping equipment running smoothly on site.