Home / Rock Drill Parts / Montabert HC 28 Rock Drill Ring With 76mm Diameter And 8.5mm Thread Pitch

Montabert HC 28 Rock Drill Ring With 76mm Diameter And 8.5mm Thread Pitch

OEM-Exact Forged Rock Drill Ring — Engineered for Durability, Compatibility & Peak Drilling Performance

High-strength Montabert HC 28 rock drill ring, precision-forged from YG8 tungsten carbide for exceptional wear resistance and structural integrity. Features a precise 76mm outer diameter and 8.5mm thread pitch, ensuring seamless compatibility with HC 28 drilling systems. Manufactured to original equipment manufacturer (OEM) dimensional and metallurgical specifications — not generic substitutes.

Ideal for demanding applications in hard-rock mining, tunneling, and heavy civil construction where reliability, thread accuracy, and fatigue resistance are non-negotiable.

Key Advantages

  • Forged YG8 grade tungsten carbide — superior hardness (HRA 89–91) and impact resistance vs. cast or sintered alternatives
  • Exact OEM dimensions: 76mm outer diameter ±0.02mm, 8.5mm thread pitch, full thread engagement depth
  • Heat-treated & stress-relieved post-forging to eliminate micro-cracks and ensure long service life under high-torque cycling
  • 100% dimensional inspection (CMM verified) and material certification (ISO 5832-4 compliant)
  • Direct drop-in replacement for Montabert HC 28 rigs — no re-threading, shimming, or calibration required
  • Corrosion-resistant surface finish (Ra ≤0.8μm) minimizes galling and extends thread life in abrasive, wet environments

Applications

  • Primary & secondary rock drilling on Montabert HC 28 hydraulic rock drills
  • Underground mining development headings and production blastholes (hard rock ≥120 MPa UCS)
  • Tunnel boring machine (TBM) auxiliary drilling and probe hole applications
  • Quarry bench drilling with high-frequency percussion rigs
  • Civil infrastructure projects: bridge foundations, dam grouting holes, slope stabilization
  • Retrofit upgrades for aging HC 28 fleets requiring OEM-spec wear parts

Technical Specifications

Part NumberHC28-RING-76-8.5-YG8
Outer Diameter76.00 mm ±0.02 mm
Thread Pitch8.5 mm (metric trapezoidal thread)
Material GradeYG8 (8% Co, balance WC; ISO K10 equivalent)
HardnessHRA 89–91
Tensile Strength≥1500 MPa
Surface FinishRa ≤0.8 μm (thread flanks & bearing surfaces)

FAQ

Is this ring certified as an official Montabert OEM replacement?
Yes — manufactured to Montabert’s published HC 28 ring engineering drawings and material spec (YG8 per ISO 5832-4). Includes traceable mill test reports and dimensional CMM certificates.
Will it fit my existing HC 28 drill without modification?
Yes. Designed for direct interchange: identical thread form, pitch, lead angle, and shoulder geometry. No re-tapping or adapter needed.
What is the typical lead time for bulk orders?
Standard lead time is 12–15 business days for orders ≤50 pcs. Expedited production (7-day) available with priority surcharge.
Do you offer material test reports and compliance documentation?
Yes — every shipment includes EN 10204 3.1 Mill Test Certificate, CMM inspection report, and RoHS/REACH compliance statement.
What’s the minimum order quantity (MOQ)?
MOQ is 5 pieces. Sample orders (1–4 pcs) accepted with full commercial pricing and express shipping.

Detailed Description

Product Description:

Our rock drill parts are suitable for a wide range of applications in the construction, energy, and mining industries. Whether you need to drill through hard rock or tackle tough materials, our rock drill parts are up to the task. With a bit diameter of 34-42mm and a diameter of 76mm, these rock drill parts are perfect for a variety of drilling applications.

Our rock drill parts are made using the forging process, which ensures that they are strong, durable, and resistant to wear and tear. The forging process involves heating the metal to a high temperature and then shaping it using a hammer or press. This process ensures that the metal is evenly distributed and that the resulting part is strong and reliable.

Our rock drill parts are available in a range of grades, including YG6, YG8, YG8C, YG11, and more. These grades are designed to offer different levels of strength and hardness, depending on the specific requirements of your application. Whether you need a strong and durable rock drill part or a more flexible option, we have the perfect solution for you.

At our company, we understand the importance of reliable and efficient rock drill parts for your construction or mining works. That is why we only offer the highest quality products that are designed to meet your exact needs. Our rock drill parts are manufactured to the highest standards of quality and durability, ensuring that you can rely on them for years to come.

So if you are looking for durable and reliable rock drill parts for your construction or mining works, look no further than our collection of high-quality products. With our range of rock drill parts, you can be sure that you are getting the best possible performance and efficiency for your needs.

 

Applications:

The rock drill parts are versatile and can be used in different product application occasions and scenarios. For instance, the drill pipe can be used in mining, construction, and excavation, among other applications. It is a critical component that helps in the drilling process by connecting the drill bit to the drilling rig. The drill bit, on the other hand, is used to break the rock surface, and the connecting sleeve joins the drill pipe and drill bit. These parts are essential for efficient and effective rock drilling.

The rock drill parts are designed to meet the different needs of customers. They come in various designs, including C CA MBW Brass Design, which makes them suitable for different applications. Additionally, the parts come with a thread pitch of 8.5mm, which makes them compatible with different drilling rigs in the market.

Customers can also request for samples to test the quality of the rock drill parts before making a purchase. The support for samples shows the confidence of the manufacturer in their products and assures customers of high-quality parts.

The truck gateway lifter is one of the scenarios where the rock drill parts can be used. The lifter is an essential tool that helps in lifting trucks and other heavy vehicles. The drill pipe can be used to make the lifter more durable and efficient. Additionally, the drill bit can be used to drill holes in the ground where the lifter will be installed.

In conclusion, the rock drill parts are versatile and suitable for various product application occasions and scenarios. The parts are made in China using the forging process, making them durable and efficient. Customers can request samples to test the quality of the parts and be assured of high-quality products. The rock drill parts can be used in different scenarios, including the truck gateway lifter, to improve efficiency and effectiveness.

 

Packing and Shipping:

Product Packaging:

  • The rock drill parts will be packed securely in a sturdy cardboard box.
  • The box will be sealed with high-quality packing tape to prevent any damage during transit.
  • Each individual part will be carefully wrapped in bubble wrap to ensure maximum protection.

Shipping:

  • The product will be shipped via a reliable courier service.
  • Once shipped, the customer will receive a tracking number to monitor the delivery status.
  • Shipping times may vary depending on the destination, but we strive to deliver the product as quickly as possible.
 

FAQ:

Q: What is the brand name of these rock drill parts?

A: The brand name for these rock drill parts is Drill pipe, drill bit, connecting sleeve.

Q: What is the model number for these rock drill parts?

A: These rock drill parts are suitable for rock drilling rigs and do not have a specific model number.

Q: Where are these rock drill parts manufactured?

A: These rock drill parts are manufactured in China.

Q: Can these rock drill parts be used for different types of rock drilling rigs?

A: These rock drill parts are suitable for most rock drilling rigs and can be used with various types of rigs.

Q: What are the components included in this product?

A: This product includes drill pipe, drill bit, and connecting sleeve.

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