What hammer sizes are compatible?

We support hammer sizes of 4', 5', 6', 8', 10', and 12'.

What is the lead time for orders?

Peak season lead time is one month, while off-season lead time is within 15 workdays.

What certifications do your products have?

Our products are certified with CE and ISO 9001:2015.

Symmetric Drilling Overburden Drill Concentric Casing System with Ring Bit

Name: Symmetric Drilling Overburden Drill Concentric Casing System with Ring Bit
Brand: Zhejiang Sanrock Supply Management Co., Ltd.
SKU: 2046301965

Zhejiang, ChinaZhejiang Sanrock Supply Management Co., Ltd.

US$689.80-708.60

1 Piece

Product profile

After-sales Service

Online Technical Services

Warranty

Online Technical Services

Certification

CE, ISO 9001:2015

Model NO.

146mm-Concentric Casing system

Standard

AISI, JIS

Surface Treatment

Spray-Paint

Manufacturing Process

Forging

Material

Tungsten Carbide, Alloy Steel

Shank

DHD, Ql, SD, Mission

Bit Diameter{Button Lncluded}

123.5mm

Casing Shoe I.D

116mm

Casing Tube O.D

146 mm

Maximum Reaming O.D

156mm

Application

Coal Mining,Quarry Drilling ,Construction Works

Formation

Soft,Medium and Hard Formation

Different Structures

Concentric System with Ring Bits, Wing and Blocks

Hammer Size

4", 5", 6", 8", 10", 12"

Casing Size

114/ 127/140/146/178/194/219/254/273/325mm

Advantage

High Performance

Transport Package

with Wooden Case Outside, or as Per Your Request

Trademark

SANROCK

Origin

Zhejiang, China

Production Capacity

8000pieces/Month

Key features

Simultaneous Drilling and Casing: Designed to drill and case holes simultaneously through unstable ground conditions.

High Penetration Rate: Full face head design with ring bit significantly improves penetration rate and hole straightness.

Minimized Disruption: Internal flushing grooves and built-in casing shoes seal the hole, minimizing surrounding disruption.

Versatile Formation Handling: Suitable for soft, medium, and hard formations in water wells, geothermal wells, and mining.

Wide Casing Size Range: Available in sizes from 114mm to 406mm based on specific customer needs.

Multiple Hammer Sizes: Compatible with hammer sizes ranging from 4 inches to 12 inches.

CE and ISO 9001 Certified: Meets international standards with CE and ISO 9001:2015 certifications.

Online Technical Support: Provides online technical services and warranty support for all products.

Company profile

High Repeat Buyers ChoiceImporters and ExportersFull CustomizationFlexible Customization

Zhejiang Sanrock Supply Management Co., Ltd.

Zhejiang, China

Business Type: Manufacturer/Factory, Trading CompanyExport Year: 2020-10-16Nearest Port: ningbo, qingdaoAverage Response Time: ≤2.87hTerms of Payment: LC, T/T, D/P, etc.International Commercial Terms(Incoterms): FOB, EXW, CFR, CIF, FAS, CIP, CPT

AI-Powered supplier vetting

SummaryZhejiang Sanrock Supply Management Co., Ltd. is a China-based limited company identified as both a trading company and manufacturer/factory, offering mining machinery and related mechanical and electronic equipment. It reports strong export orientation, with 90% of total sales from exports, self-operated import/export rights, and five years of export experience. Customization is available across sample-based, design-based, full, minor, and flexible formats. However, the supplier is not identified as a professional technical supplier and does not provide 3D software design services. Evidence is insufficient for certification holding, financial credibility, production capacity, and customer cases. Service procedures for supplier approval, corrective actions, and complaint handling exist but lack written records; inventory, overseas warehouse, and overseas showroom capabilities are explicitly absent.

Supplier typeThe supplier is a limited company in Zhejiang, China, classified as both a trading company and manufacturer/factory. Its stated scope covers mining machinery, mechanical equipment, electronic products, supply-chain services, warehousing, and consulting activities.

After-Sales capabilityThe supplier has procedures for handling customer complaints and corrective/preventive actions, but no written records are available. It also explicitly lacks in-stock service capacity, overseas warehouse capability, and overseas showroom capability, while the effectiveness of after-sales execution is not demonstrated.

R&D capabilityThe supplier is explicitly not a professional technical supplier and does not provide 3D software design services. Although it offers several customization formats, the records do not establish research, development, or advanced innovation capability.

Customization capabilityThe supplier explicitly supports customization from samples, customization from designs, full customization, minor customization, and flexible customization. This provides direct evidence of broad customization service capability, although it does not establish 3D design support.

Product Q&A

Q:What can you buy from us?

DTH drilling rig, core drilling rig, highway pile driver, solar pile driver, anchor pile driver, rotary drill rig, underground jumbo drill rig, screw air compressor, DTH hammer, drill rod, piston air compressor, pneumatic rock drill, drill bit, tricone bit, spare parts.

Q:How can I make payment?

You can pay by credit card, TT, Western Union, LC, PayPal, Money Gram, or small-amount payment.

Q:How is the shipment and how long does it take?

For large or heavy products, we ship by sea or land. For small items, we use DHL, UPS, FedEx, or TNT. Shipping time depends on the destination country and city.

Q:How is your quality control?

We have experienced QC staff who perform strict inspection and testing for every order before shipping.

Q:What are the available casing sizes?

Casing sizes include 114, 127, 140, 146, 178, 194, 219, 254, 273, 325, and 406mm, based on specific customer needs.