DTH Drilling Tools
Full range from 3.5 to 12 inch
Hammers supplied together with matching bits across five series, for hole range Φ90–Φ400 mm.
Top Hammer Drilling Tools
Complete threaded drilling tool solutions
Bits, rods, couplings and shanks for mainstream R32 / R38 / T38 / T45 / GT60 systems.
Tricone Drilling Tools
Water wells · mining · geothermal
Tricone bits with matching drill rods for water wells, blast holes and geothermal drilling.
ABOUT MAINROCK
From Swedish engineering roots to a global mining drilling tool maker
Shandong Mainrock Group originates from a well-known Swedish rock drilling brand and began as 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 core strategic business unit.
KAIYUE (90 staff; 36,000 m² phase one plus 18,000 m² phase two) and EUMA (45 staff; 40 mu, 26,000 m²) together give over 80,000 m², 135 employees and 100+ machines. We are the largest Chinese OEM plant for a Swedish brand, exporting 200+ products across five series to Russia, South Africa, Peru and Brazil.
- Two own production bases (Mengyin / Yanggu)
- Largest Chinese OEM plant for a Swedish brand
- 200+ products in five series, OEM / ODM supported
Industries We Serve
Open pit mining · water wells · quarry & aggregate · geothermal · tunnel & foundation
Open pit mining · bench blasting and production holes
Bench blast holes, pre-split holes and dewatering holes dominate, mostly Φ90–Φ165 mm; tools must run continuously at high air pressure with a stable cost per hole. We match DHD340A / DHD360 / QL60A hammers with bits of the same series, threads API2 3/8″–API3 1/2″REG. Spherical (SP) bits suit hard rock and conical (SBL) combinations suit abrasive rock, cutting bit-change downtime. For large open-pit mines abroad, 8-inch and larger hammers and bits can be used, or mining tricone bits of Φ200–311 mm.
View open pit mining solution
Water well drilling · domestic and irrigation wells
Holes are mostly Φ110–Φ250 mm through overburden into bedrock, where success rate and yield are what customers care about. We use QL / SD / Mission hammers with DHD-type bits and Φ76–Φ102 mm rods; lower pressure in overburden prevents collapse, higher pressure in rock improves penetration — one rig covers several hole sizes by changing hammers.
View water well drilling solution
Quarry & aggregate · stone pits and cement mines
Medium-depth holes of Φ90–Φ140 mm, where metres per shift and tool life drive cost. We recommend DHD3.5A / DHD340A / QL40A with flat or convex face bits, button type chosen by rock abrasiveness (SP or SP+SBL). Bits are made in our Yanggu plant, so batch consistency and bulk lead times are under control.
View quarry & aggregate solution
Geothermal drilling · medium-deep and hot spring wells
Large depths and high temperatures — tools must resist heat and wear, and hole straightness must be held to a tighter tolerance. We use SD / NUMA large-diameter hammers with matching bits, or tricone bits with tricone rods; the friction-welded rods made at our Mengyin plant take high torque. In hot sections, lower the air pressure and raise rotation speed to reduce the thermal load on the tool.
View geothermal solution
Tunnel & foundation · probe drilling and anchor holes
Probe drilling, pipe-roof holes and anchor cable holes in confined spaces with compact equipment. We supply QL40A / Mission30 small-diameter hammers and top hammer tools with short rods for staged work; in collapsing ground we use casing-while-drilling, with couplings and shanks made to R32 / T38.
View tunnel & foundation solution
Three drilling tool categories, supplied as complete sets
DTH · Top Hammer · Tricone
DTH Drilling Tools DTH DRILL TOOL
Five DTH hammer series (DHD / QL / Mission / NUMA / SD) with matching bits, hole range Φ90–Φ400 mm, with or without foot valve.
View SeriesTop Hammer Drilling Tools TOP HAMMER DRILL TOOL
Threaded drilling tools: bits, rods, couplings and shanks for R32 / R38 / T38 / T45 / GT60 systems.
View SeriesTricone Drilling Tools TRICONE DRILL TOOL
Tricone bits and rods for medium-hard to hard rock in water wells, blast holes and geothermal drilling.
View SeriesDTH tools · best-selling models
DHD / QL / Mission / NUMA / SD series — full size range, drawing-based customization available
DHD340A DTH Hammer
Φ99 mm · hole Φ110-135 mm · 40.5 kg · API2 3/8″REG
View Details
DHD340 DTH Hammer
Φ99 mm · hole Φ110-135 mm · 43 kg · API2 3/8″REG
View Details
DHD350A DTH Hammer
Φ126 mm · hole Φ136-155 mm · 70 kg · API2 3/8″REG
View Details
DHD350 DTH Hammer
Φ125 mm · hole Φ135-155 mm · 78.5 kg · API2 3/8″REG
View Details
QL50 DTH Hammer
Φ126 mm · hole Φ135-155 mm · 73.5 kg · API2 3/8″REG
View Details
QL60 DTH Hammer
Φ148 mm · hole Φ158-190 mm · 105 kg · API3 1/2″REG
View Details
Mission50 DTH Hammer
Φ126 mm · hole Φ136-155 mm · 70.5 kg · API2 3/8″REG
View Details
Mission60 DTH Hammer
Φ144 mm · hole Φ152-203 mm · 91.5 kg · API3 1/2″REG
View DetailsTricone Bits · Best Sellers
Five series from IADC 4xx to 8xx, Φ159–349 mm, covering soft to hard formations
Why Choose Us
Materials · production · engineering · service — four reasons to rely on us
Material advantage
We source from China's leading steel mills and inspect every incoming batch. Alloy composition is customised by adjusting trace elements to match your working conditions, lifting tool material performance to a new level.
Production advantage
A full-process production line keeps quality under control. We adjust product design and process routes to different geological and working conditions, extending service life and reducing failure rates.
Engineering advantage
20 engineers, 10 of them senior, work under ISO 9001 with every operation standardised. Most shop-floor workers have more than 8 years in drilling tool production.
Service advantage
Professional pre- and after-sales support, with customer satisfaction and repeat-purchase rates among the highest in China. Bulk or custom small packaging, and FOB / CIF / DDU / DDP terms.
Partners
Long-term cooperation with major Chinese steel and mining groups
CHINALCO
Zijin Mining
CMOC
Jiangxi Copper
China GoldReady to buy? Send your specification — a proposal within 24 hours
OEM / ODM, sample testing and bulk supply. Send model, quantity and destination port — we reply with quotation and lead time.