Overburden Symmetric Casing Concentric Pilot Bit and Ring Bit with Casing Shoe for Mining and Quarrying

• Customization: Available
• After-sales Service: One Year
• Warranty: One Year
• Model NO.: SOD273
• Type: Symmetric Ring Bit
• Application: Drill Complex Rock Formations,Building Materialcon
• Certification: CE, ISO9001: 2000
• Condition: New
• Manufacturing Process: Forging
• Material: Tungsten Carbide
• Suitable Hammer Model: 3"-18" Hammer
• Bit Shank: DHD,SD,Ql,Mission,Mach,Numa
• Transport Package: Wooden Box
• Specification: 5-12mm
• Trademark: STAROCKDRILL
• Origin: China
• Production Capacity: 20000sets/Month

Product Description

DTH Hammer Drilling Overburden Symmetric Casing Bit Concentric Pilot Bit and Ring Bit with Casing Shoe

Our concentric casing system with ring bits represents the latest technology in overburden drilling equipment. This system is particularly suitable for work conditions with gravel and fractured layers, Symmetric Casing Bit offering outstanding performance and efficiency.

Specification

 

Features

1.Stable and Reliable Performance: Our drilling tools feature a full cutting structure, enabling fast progress and precise holes.

2.Versatile Operation: Compared to eccentric drilling, our tools require less torque, making them suitable for vertical, horizontal, or any directional operations.

3.Minimized Hole Blockage: Our innovative design minimizes the likelihood of hole blockage, ensuring high debris removal efficiency. Unlocking and re-locking operations are also made easy.

4.User-Friendly and Safe: Our drilling equipment is designed for ease of use and provides excellent safety performance, prioritizing the well-being of operators.

Product Introduction

The concentric casing system comes in two variations: the three-piece set and the two-piece set. The three-piece set comprises a central drill bit, a casing shoe, and an expansion drill bit. Meanwhile, the two-piece set consists of a concentric drill bit and an expansion sleeve (formed by compressing the expansion drill bit and casing shoe). 

By welding or thread connecting the casing shoe to the casing, the root canal gradually slides down as the down-the-hole hammer and central drill bit advance. This drilling tool allows construction at any angle, including horizontal, and can reach depths well beyond 100 meters. Drilling and casing are synchronized for seamless operations.

Trusted by global drilling contractors and customers who looking for high quality drilling tools for their drilling rigs and rock drilling machines, we would be honored to have the opportunity to earn your trust and provide you with rock drilling products that meet your application needs.

Application scenarios

The versatility of our Shank Adapter makes them widely applicable across various industries, including open-pit mining, underground mining, tunneling, anchoring projects, blast furnace tapping, tunnel construction, hydroelectric projects, quarrying, and various other construction projects.andling, land preparation

Technical Specifications

(Custom configurations available upon request.)

Model	Casing OD (MM)	MAX Thickness(mm)	Reamer(mm)	Casing Shoe ID(mm)	Through Bit diameter(mm)	Hammer size	Drill Rod(mm)
SOD108	108	6	118	85	75	3 INCH HAMMER	76
SOD114	114	6	128	90	80	3 INCH HAMMER	76
SOD127	127	9	141	97	85	4 INCH HAMMER	76
SOD140	140	10	154	108	95	4 INCH HAMMER	76
SOD168	168	10	182	138	125	5 INCH HAMMER	76/89
SOD178	178	10	192	148	135	5 INCH HAMMER	76/89
SOD183	183	10	198	152	140	5 INCH HAMMER	76/89
SOD194	194	10	210	164	148	6 INCH HAMMER	89/114
SOD219	219	10	235	184	172	6 INCH HAMMER	89/114
SOD245	245	10	261	210	192	8 INCH HAMMER	114
SOD273	273	10	305	238	219	8 INCH HAMMER	114
SOD323	323	10	348	294	265	10 INCH HAMMER	114
SOD406	406	12	432	358	330	12 INCH HAMMER	127

Drawings & Dimensions

Detailed CAD drawings and dimensional diagrams are available for download here or upon inquiry. Our engineering team can provide tailored designs to meet specific project requirements.

Packaging & Shipping

After Sales Service

Standard Warranty: 12 months or 2,000 operating hours (whichever comes first).
Extended Warranty: Optional coverage up to 36 months.
Global Support: 24/7 technical assistance and spare parts supply.
Training: On-site or remote operation/maintenance training.

Company Profile

HENAN STAROCKDRILL EQUIPMENT CO., LTD

Welcome to Starockdrill, a specialist manufacturer of rock drilling tools. Since our establishment in 2008, Henan Starockdrill Equipment Co., Ltd. has been committed to the research, development, and production of rock drilling tools. Our mission is to provide customers with high-quality, efficient, and reliable drilling tools and solutions, helping them enhance productivity, reduce costs, and create more value.

Why Choose Us?

Other Products

OEM/ODM capabilities
Competitive pricing & bulk discounts
Fast shipping & customs clearance support
Turnkey project solutions

Threaded Drill Rods
Coupling Sleeves
Threaded Drill Bits
Eccentric Casing System
Double Casing Drilling System

Certifications

Project Case

FAQ

Q: What’s the lead time for orders?
A: Standard models ship in 15–30 days; customized units require 30–45 days.

Q: Do you provide after-sales service overseas?
A: Yes, we have partnered service centers in key regions.

Q: Can I request a customized bucket size?
A: Absolutely! We offer tailored attachments.

Q: What documents do you provide for export?
A: Full export package (Commercial Invoice, Packing List, Bill of Lading, COC, etc.).

Q: How do I place an order?
A: Contact us via email/phone for a quote, then confirm with a PO.