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The extension rod is a threaded drill rod supplied by Jessin Rock Drill Co., Ltd., manufactured in China. It is forged from alloy steel bar 23CrNi3MoA and undergoes heat‑treatment processes such as carburizing, high‑frequency surface hardening and phosphorising. The product is offered in a round body shape with a length range of 600 mm to 6400 mm. Thread profiles include R32, R38, T38, T45, T51 and T60, and diameters are available as Hex 25, Hex 28, Rd 32, Rd 38, Rd 45 and Rd 51.
Round rods provide lower weight and material usage, while hexagonal rods improve rigidity and reduce hole deviation during drifting and tunnelling. The use of carburising on larger diameters gives a hardened surface over the whole rod, suited to underground drilling with water flushing. High‑frequency treatment on smaller diameters hardens only the thread ends, extending service life in surface drilling where air is the flushing medium. Phosphorising further enhances erosion resistance, a standard requirement for abrasive drilling environments.
The rods are typically purchased by mining contractors, civil‑engineering drilling firms and well‑drilling services that need reliable drill string components. Jessin does not impose a minimum order quantity, allowing trial orders for testing fit and performance. Buyers should confirm packaging details - usually bundles of ten rods - and request Incoterms, payment terms and lead‑time directly with the supplier before finalising a contract.
| Material | Alloy steel 23CrNi3MoA |
| Heat treatment | Carburizing for large diameters, High‑frequency surface hardening for small diameters, Phosphorising for erosion resistance |
| Body shape | Round (typical for extension rods) |
| Thread standards | R32, R38, T38, T45, T51, T60 (typical ISO thread series) |
| Diameter options | Hex 25 mm, Hex 28 mm, Rd 32 mm, Rd 38 mm, Rd 45 mm, Rd 51 mm (standard size range) |
| Length range | 600 mm - 6400 mm (typical) |
| Tensile strength | Typical 850 MPa - 1000 MPa for 23CrNi3MoA alloy steel |
| Hardness | Typical 30‑35 HRC after heat treatment |
| Surface finish | Typical Ra 1.6 µm |
| Packaging | Bundles of ten rods wrapped in steel mesh (typical) |
Jessin Rock Drill Co., Ltd. is based in Taohua Village, Hanpu Town, Changsha, Hunan Province, China. It is classified as an imported supplier with a harbor trust tier on the platform. The supplier’s response metrics show a response rate of 0 % and no recorded average response time.
The company specialises in manufacturing extension drill rods for underground and surface drilling applications, offering both round and hexagonal profiles and multiple heat‑treatment options. It lists a length range of 600 mm to 6400 mm and provides a variety of thread standards without a minimum order quantity, indicating flexibility for trial purchases.
| Business Type | Supplier |
| Year Established | Recently Joined |
| Employees | Contact Supplier |
| Annual Revenue | Contact Supplier |
| Main Products | View Products Tab |
| Major Markets | Global |
| Response Time | <4h |
| Response Rate | New Supplier |
Before placing an order, buyers should verify the alloy grade, heat‑treatment method and the exact thread and diameter specifications needed for their drill string. Request a mill test report or material certificate to confirm that the rod complies with the 23CrNi3MoA standard and the claimed hardness values. Confirm that the packaging format matches the intended shipping method and that any required markings are included.
Logistics for the extension rods typically involve sea freight from ports in China, but the exact Incoterms, lead‑time and payment terms must be agreed with Jessin directly. Suppliers often quote a lead‑time of several weeks for production and dispatch; however, buyers should request a detailed schedule and clarify whether the price includes freight, insurance or customs clearance. Payment terms are usually negotiated on a case‑by‑case basis and may involve a letter of credit or advance payment.
Quality control should include visual inspection of the rod surface, dimensional checks of length and diameter, and hardness testing to verify the stated HRC values. Request a certificate of compliance that references the relevant ASTM or ISO standards for alloy steel drill rods. Upon receipt, arrange for a sample to be tested under the buyer’s own conditions before accepting the full shipment.
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When sourcing Extension Rod for your business, securing the right balance of quality and cost is essential. Jessin Rock Drill Co., Ltd., a verified supplier based in China, offers this product for international export. By purchasing directly from the manufacturer or authorized exporter, buyers can negotiate favorable FOB prices starting at $1/Bags and manage bulk orders with a minimum order quantity (MOQ) of 1 Bags. This product is a staple in the Agriculture sector with strong demand from importing countries worldwide.
Importing Extension Rod requires careful attention to shipping logistics, customs compliance, and secure payment terms. Jessin Rock Drill Co., Ltd. offers flexible shipping options such as Full Container Load (FCL) or Less than Container Load (LCL) via sea freight. Common payment methods for international B2B transactions include Letter of Credit (L/C), Telegraphic Transfer (T/T), and Documents against Payment (D/P). All transactions and RFQs are facilitated through EximNext, a leading import export marketplace designed to make cross-border trade secure and efficient.
Finding trustworthy partners is the foundation of successful importing. The supplier of this Extension Rod has been verified on our platform. Whether you are a distributor, wholesaler, or procurement manager, you can request a free quotation, ask for product samples, and finalize your bulk purchase with confidence. EximNext hosts thousands of verified manufacturers and exporters across 200+ countries. Explore similar products in the Agriculture category and connect with top-tier exporters on our comprehensive online B2B marketplace. Start your sourcing journey today.
Importing Extension Rod requires careful attention to shipping logistics, customs compliance, and secure payment terms. Common shipping options include Full Container Load (FCL) or Less than Container Load (LCL) via sea freight. Buyers should verify import duties in their destination country. Common payment methods include Letter of Credit (L/C), Telegraphic Transfer (T/T), and Documents against Payment (D/P).
The current listed wholesale price for Extension Rod from Jessin Rock Drill Co., Ltd. is $1/Bags on FOB terms from China. Prices may vary depending on order volume, packaging, and destination. For the most accurate bulk quote, send a direct RFQ to Jessin Rock Drill Co., Ltd. through EximNext.
The supplier, Jessin Rock Drill Co., Ltd., has set a Minimum Order Quantity (MOQ) of 1 Bags for Extension Rod. For sample requests or smaller trial orders, contact the supplier directly through our platform's inquiry system.
The HS Code classification for Extension Rod depends on the specific grade and form. Contact Jessin Rock Drill Co., Ltd. through EximNext for the exact HS Code and customs documentation required for your destination country.
To import Extension Rod from China, negotiate shipping terms (FOB, CIF, or EXW) directly with Jessin Rock Drill Co., Ltd.. Ensure you have the necessary import licenses for Agriculture products in your destination country.
Yes, Jessin Rock Drill Co., Ltd. is a verified supplier on EximNext. You can view their complete company profile, business registration details, certifications, and export history before placing a bulk order.
For a complete technical data sheet or Certificate of Analysis (COA), send an inquiry directly to Jessin Rock Drill Co., Ltd. through EximNext.
Jessin Rock Drill Co., Ltd. offers Extension Rod with standard export packaging. Custom packaging, private labeling, and OEM/ODM options may also be available for large wholesale orders.
Extension Rod is actively imported by buyers worldwide. Request a destination-specific CIF or CFR quote from Jessin Rock Drill Co., Ltd. through our platform.
Jessin Rock Drill Co., Ltd. maintains international quality certifications. These ensure that the Extension Rod meets international quality, safety, and regulatory standards required for cross-border trade.
Click "Request Quotation" on this product page, specify your required quantity, preferred shipping terms, and destination country. Jessin Rock Drill Co., Ltd. will respond with a detailed wholesale quote including FOB pricing, lead time, and payment options.
Common payment methods include Letter of Credit (L/C), Telegraphic Transfer (T/T), Documents against Payment (D/P), and Escrow services. Confirm accepted terms directly with Jessin Rock Drill Co., Ltd..
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