Replaceable Type Roller Bit

MH-3C

Quick Replacement

MH-3C series is designed for contractors requiring flexibility and convenience in bored piling operations. It utilizes a dual assurance design combining mechanical bolt connections with welding, ensuring the reliability of connections while allowing for the onsite replacement of roller bits. The roller bits is derived from the advanced FIRMTECH Pro model MH-3, inheriting its advantages and further featuring convenient replacement and precise welding positioning capabilities.

3rd Generation Cone

• Full Covered 3rd Generation

• Inserts Qty: Maximized 52 pcs 

• OD: 139 mm 

• Feature: Full covered insert, no blind spot

• Performance: Maximum duration & penetration rate

Slot & Bolts Connection

 Base slot with dual-bolt connection

 • Threaded Rollers: Ensures stable connection strength over time

• Durability: Maintains high strength, resisting wear and tear

• Easy Maintenance: Reduced contact area for easier roller replacement

Holder

• Spec.125mm*80mm*120mm

• Seamlessly integrated and precisely machined for optimal fit.

• Minimizes the impact of welding heat on the bearing system.

• Accurate positioning, quick replacement.

Perfect Inserts for Every Rock Type

Engineered for All Rock Conditions—Tailored Solutions for Your Unique Project

Chisel

60-110MPa

Conical

100-180MPa

Spherical

130-280MPa

* Note: only available for 3rd Generation Cone

Spec.

MH-3C

Current spec. similar to 8.5″, we also have 12.5″ roller cutter, which could customize as per request

Additional Support

Select Roller Bit

Selecting the appropriate type and quality based on the geological formation is crucial for optimizing drilling efficiency

Improve Tool Design

A well-designed core barrel enhances debris removal, significantly improving drilling efficiency

Welding Instruction

Correct roller bit placement and welding accuracy are vital for achieving the desired drilling results.

Operation Tips

Proper control of drilling weight and rotating speed directly impacts penetration rates and roller bit wear

Application

1200mm Roller Bit Core Barrel - Guangdong

Rock type: Grainite
Roller Bit Type: MH-3 Conical
Rock socketing length 1.5D
Drilling rig: SR405R
Penetrating rate: 0.7m/h due to part rock weathered

1800mm Roller Bit Core Barrel - Wuhe Subway Station

Rock Type: Fresh hard grainte
Roller Bit Type: MH-3 Conical
Rock socketing length: 35m+
Drilling rig: Zoomlion 550L Pile Length: 95m
Core barrel Height: 3.5m

1200mm Roller Bit Core Barrel - Chengdu

Rock type: Tuff
Roller Bit Type: MH-3R Conical
Rock socketing length 2D
Drilling rig: XR360
Penetrating rate: 0.5m/h
Pile length 38m

1200mm Roller Bit Core Barrel -Guangzhou

Rock type: Grainite Gneiss
Roller Bit Type: MH-3 Conical
Rock socketing length 2-5m
Drilling rig: XR360
Penetrating rate: 0.4m/h
Pile length 30m

1200mm Roller Bit Core Barrel - Aisa

Rock type: Grainite
Roller Bit Type: MH-3 Conical
Rock socketing length 2D
Drilling rig: Bauer BG28
Penetrating rate: 0.5m/h
Pile length 25m

2500mm Core Barrel with Roller Bit - Middle east

Rock type: Grainite
Roller Bit Type: MH-3H Conical
Rock socketing length 1.5D
Drilling rig: Bauer BG30
Penetrating rate: 0.4m/h
Pile length 32m

CONTACT US

We are committed to tack the most challenging hard rock project. Our knowledgeable sales staff will find the right tool and solution to make your project more efficient and profitable.

Related Products

Welded Type

Replaceable Type