Company Profile
COMPANY PROFILE
Shandong Mainrock Group originates from a well-known Swedish rock drilling brand, with roots in the technical service team of the Shandong Geological Research Institute. The group operates two production bases and four global sales companies, with KAIYUE and EUMA as its two production entities. Mining drilling tools are our most complete and most strategic business unit.
Our range covers three categories — DTH, top hammer and tricone drilling tools — with more than 200 products across five series, plus rock drilling accessories, coal mining tools and anchor drilling tools. We export to Russia, South Africa, Peru and Brazil, and are becoming a significant player in global mining drilling tools.
The group has two production entities. KAIYUE (90 staff; 36,000 m² phase one, 18,000 m² phase two) runs heavy friction welders, tube upsetters, high-precision CNC and thread lathes that keep rod production stable and reliable. EUMA (45 staff; 40 mu, 26,000 m²) runs vacuum heat treatment and precision machining. Together: over 80,000 m², 135 employees and 100+ machines — and the largest Chinese OEM plant for a Swedish brand.
The group keeps investing in industry-academia collaboration with several universities and hosts internship programmes. OEM / ODM and drawing- or sample-based customization are supported, with quotations and sample policy answered within 24 hours.
Our Advantages
Own production lines, traceable batches, committable lead times
Manufacturing Capability
Two production bases and three plants cover over 80,000 m² with 100+ machines: heavy friction welders, tube upsetters, high-precision CNC and thread lathes, vacuum heat treatment and precision machining. Forging, machining, welding, heat treatment and inspection are all in-house, so several batch orders can run in parallel without competing for capacity.
Quality Management
Run under ISO 9001: incoming material is tested batch by batch with alloy composition re-checked; first-piece approval and in-process patrol inspection are in place; critical dimensions (outer diameter, hole range, connection thread, concentricity) are measured 100%; finished tools undergo air-tightness and impact tests, with full inspection before shipment and reports supplied with the goods. SGS / BV third-party inspection and remote video audits are supported.
Lead Time & Stock
Standard models are kept in stock for immediate shipment. Production lead times: DTH tools about 30 days, top hammer tools 20–25 days, tricone tools 50–60 days. Lead times shift slightly with order quantity and are confirmed in the quotation.
Export Service
An English-speaking team follows each order one-to-one and replies to inquiries within 24 hours. EXW / FOB / FCA / CIF terms; road, rail, air or sea freight depending on destination; certificate of origin and full export documents (CI / PL) supplied.
Milestones
2013 Foundations → 2019 Globalisation → Brand building
Focused on the domestic mining drilling market, supplying practical, cost-effective products and gaining experience across different rock formations. Customers include major mines such as Zijin Mining and Shandong Gold.
With deep industry experience and a solid manufacturing base we launched our global strategy, opening markets in Russia, South Africa, Peru and Brazil.
Guided by precise positioning, hard technology, deep roots in the production region and outstanding quality, we move from manufacturing to brand building and aim to be a long-term partner in global mining drilling tools.
Certifications
National High-Tech Enterprise · “Little Giant” specialised enterprise · industry association member
Two companies · three plants
Over 80,000 m² of factory space, 135 employees, 100+ machines | video audits and site visits welcome
KAIYUE · Mengyin Yinhe Road plant
No. 669 Yinhe Road, West Industrial Park, Mengyin County, Linyi, Shandong
KAIYUE: 90 staff; 36,000 m² phase one plus 18,000 m² phase two. DTH rods, water well rods, reverse circulation rods and tricone rods, with heavy friction welders, tube upsetters, high-precision CNC and thread lathes.
KAIYUE · Mengyin Chuangye Road plant
No. 001 Chuangye Road, Mengyin Sub-district, Mengyin County, Linyi, Shandong, China
Tool matching and precision machining, serving China's main drilling rig industry cluster.
EUMA · Yanggu plant
200 m east of Chenduanyu Village Committee, Shizilou Sub-district, Yanggu County, Liaocheng, Shandong
EUMA: 45 staff; 40 mu site, 26,000 m² of buildings. Rock drilling tools and mining implements, backed by China's largest drill bit production base, with integrated forging and heat treatment.
Inside the Workshop
Filmed at our Mengyin and Yanggu plants · no narration, the floor as it runs
FACTORY TOUR · 02:37
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Mengyin plant · DTH hammer and bit workshops
YANGGU PLANT · 01:51
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Yanggu plant · button bit forging and heat treatment
Support
Customisation, warranty and logistics — terms stated clearly
OEM / ODM
Made to drawing, sample or working conditions: steel grade and trace-element balance, heat treatment, connection thread, head diameter and button layout can all be adjusted. Customer logo and custom packaging available; samples are approved before mass production.
Warranty & Service
Warranty and after-sales follow the guidelines of the China Drilling Tools Industry Association: standard products carry a warranty, non-standard products are not covered by the three-guarantee policy. On any quality claim, both parties jointly determine the cause (material, working conditions or operation) and agree on replacement parts, exchange or process adjustment accordingly.
Logistics & Documents
Road, rail, air and sea freight are available depending on the destination, with door-to-door or named-port delivery. EXW / FOB / FCA / CIF terms; certificate of origin (CO) plus invoice and packing list are provided.
FAQ
The six questions buyers ask most
1. Are you a factory or a trading company?
We are an integrated manufacturer and trader: we own our factories and an international trading company. Two KAIYUE plants in Mengyin and the EUMA plant in Yanggu, Shandong, total over 80,000 m² with 100+ machines. Site visits and video audits are welcome.
2. What is your MOQ?
MOQ 1 pc.
3. How long does sampling take and how is it charged?
Sample lead time equals the normal production cycle: the process is complex and cannot be shortened for samples (except stock items). Sample cost is credited against formal orders once cooperation is established — in one or several instalments depending on the amount.
4. What is the lead time?
Lead time varies slightly with order quantity: DTH tools about 30 days, top hammer tools about 20–25 days, tricone tools about 50–60 days (public holidays excluded).
5. Which payment terms do you accept?
We accept T/T (telegraphic transfer) and L/C (letter of credit).
6. What if there is a quality issue?
Handled per the China Drilling Tools Industry Association guidelines: standard products carry a warranty; non-standard products are not covered by the three-guarantee policy.
Need detailed specifications or a sample?
Leave your requirement; we reply with price, sample policy and lead time within 24 hours.