Home / Rock Drill Accessories / Part Number 86338985 Drill Bit Tail Ring Is For Montabert HC109 Rock Drill

Part Number 86338985 Drill Bit Tail Ring Is For Montabert HC109 Rock Drill

Precision Rear Support & Alignment Ring for Montabert HC109

Part No. 86338985 is a critical wear-and-support component engineered exclusively for the Montabert HC109 rock drill. Manufactured from high-strength, abrasion-resistant alloy steel, this tail ring provides secure rear seating and precise alignment of the drill shank adapter—minimizing lateral movement, dampening vibration, and significantly reducing wear on pistons, bushings, and the shank itself.

Designed for reliability under extreme impact loads and continuous operation, it directly contributes to longer equipment life, higher drilling efficiency, and lower total cost of ownership in demanding underground and surface applications.

Key Advantages

  • Exact OEM-equivalent fit for Montabert HC109—no modification required
  • High-strength alloy steel construction with optimized hardness (HRC 52–56) for shock & abrasion resistance
  • Precision-ground inner/outer diameters ensuring ±0.02 mm concentricity and stable shank guidance
  • Reduces shank wobble and piston misalignment—cutting internal wear by up to 35% (field-tested)
  • Direct replacement for original Montabert part; includes full dimensional certification
  • RoHS-compliant and traceable batch manufacturing with 100% material test reports

Applications

  • Underground and open-pit mining—continuous high-impact drilling in hard rock
  • Tunnel boring and civil infrastructure projects requiring precision hole alignment
  • Quarrying operations with abrasive granite, basalt, or quartzite formations
  • Heavy-duty demolition and foundation drilling in reinforced concrete & bedrock
  • Rental fleet maintenance—ensures consistent performance across HC109 units

Technical Specifications

Part Number86338985
Compatible EquipmentMontabert HC109 Rock Drill
MaterialAlloy Steel (AISI 4340 equivalent), hardened & tempered
HardnessHRC 52–56
Outer Diameterφ82.00 ±0.02 mm
Inner Diameterφ60.00 ±0.02 mm
Thickness12.0 ±0.1 mm
Surface FinishGround & deburred; Ra ≤0.8 µm

FAQ

Is this 86338985 tail ring an official Montabert OEM part?
No—it is a certified OEM-spec replacement: manufactured to identical dimensional, material, and performance standards as the original, with full traceability and test documentation.
Will it fit other Montabert models like HC105 or HC115?
No—this part is dimensionally and functionally validated only for the HC109. Using it on other models may cause misalignment, accelerated wear, or failure.
What is the typical lead time for bulk orders (50+ units)?
Standard lead time is 7–10 business days ex-warehouse; expedited shipping (air freight) available for urgent orders—contact our technical sales team.
Does it come with a warranty?
Yes—24-month limited warranty covering material defects and workmanship when installed per Montabert HC109 service guidelines.

Detailed Description

Drill Bit Tail Ring (Part No. 86338985) – Suitable for Montabert HC109 Rock Drill

The Drill Bit Tail Ring, part number 86338985, is a precision-engineered structural component designed for the Montabert HC109 rock drill. It serves as the rear support and alignment ring for the drill shank adapter, ensuring proper guidance and stability during high-impact drilling operations.

Description

The drill bit tail ring is manufactured from high-strength, wear-resistant alloy steel to withstand the intense forces, vibration, and abrasion generated during rock drilling. Installed at the rear of the shank adapter, this ring provides a secure seating and alignment interface between the shank and the drill’s internal components.

Its precise fit minimizes lateral movement and vibration, reducing wear on the shank, piston, and surrounding internal parts. By maintaining optimal alignment during reciprocating and rotational motion, the tail ring contributes to improved drilling efficiency, reduced component fatigue, and extended equipment life.

Key Features

  • Part Number: 86338985

  • Compatible With: Montabert HC109 rock drill

  • Material: High-strength alloy steel

  • Function:

    • Provides rear support and alignment for the shank adapter

    • Helps absorb lateral loads and vibration

    • Reduces wear on internal components

  • Precision Fit: Ensures stable performance under heavy-duty drilling conditions

  • Durability: Designed for high impact, abrasion, and shock resistance

Applications

  • Mining and Quarrying — Enhanced stability and wear resistance in continuous drilling

  • Construction and Tunneling — Supports accurate, high-efficiency drilling

  • Heavy-Duty Rock Drilling — Ideal for demanding environments with repeated impact cycles

Conclusion

The Drill Bit Tail Ring (86338985) is an essential wear and support part for the Montabert HC109 rock drill. Its robust alloy steel construction and precision-fit design ensure stable shank alignment, reduced wear, and improved drilling performance, making it a key component for maintaining reliability in tough drilling applications.

Ensure Optimal HC109 Performance

Order genuine-spec 86338985 tail rings today—backed by engineering support, fast global shipping, and ISO 9001-certified quality assurance.

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