Basic Info.
Certification
ISO 9001:2008
Manufacturing Process
Casting
Thread
3 1/2′′ API Reg Pin
Quality
You Deserve The Best
Rock Formation
Soft. Sand, Clay, Shale, Gravel, Limestone ...
Transport Package
Plywood Box
Specification
311mm 12 1/4′′
Product Description
3 wings step drag bits are one piece construction of alloy steel cast with tungsten carbide cutting tips and gauge sides to ensure longer life.
3 wings step drag bits are economical tools when drilling softer geological formations and shallower depths, they are primarilydesigned for soft tomedium formations, such as Clay, Loam, Silt ,Mostsoft-to-medium soilsthat have some moisture, etc. And also step drag bits are recommended for drilling in Mining, Exploration, Environmental, Water well, Geo Exchange, etc.
Product specification 3 wings step drag bit |
Diameter | Thread | Part No. |
2" | 50.8 mm | optional | 3S2 |
2 1/2" | 63.5mm | optional | 3S212 |
2 5/8" | 66.7 mm | optional | 3S258 |
2 3/4" | 69.9 mm | optional | 3S234 |
2 7/8" | 73.0 mm | optional | 3S278 |
2 15/16" | 74.6 mm | optional | 3S21516 |
3" | 76.2 mm | optional | 3S3 |
3 1/8" | 79.4 mm | optional | 3S318 |
3 1/4" | 82.6 mm | optional | 3S314 |
3 1/2" | 88.9 mm | optional | 3S312 |
3 5/8" | 92.1 mm | optional | 3S358 |
3 3/4" | 95.3 mm | optional | 3S334 |
3 7/8" | 98.4 mm | optional | 3S378 |
4" | 101.6 mm | optional | 3S4 |
4 1/8" | 104.8 mm | optional | 3S418 |
4 1/4" | 108.0 mm | optional | 3S414 |
4 1/2" | 114.3 mm | optional | 3S412 |
4 5/8" | 117.5 mm | optional | 3S458 |
4 3/4" | 120.7mm | optional | 3S434 |
4 7/8" | 123.8mm | optional | 3S478 |
5" | 127.0mm | optional | 3S5 |
5 1/8" | 130.2mm | optional | 3S518 |
5 1/4" | 133.4mm | optional | 3S514 |
5 3/8" | 136.5mm | optional | 3S538 |
5 1/2" | 139.7mm | optional | 3S512 |
5 5/8" | 142.9mm | optional | 3S558 |
5 3/4" | 146.1mm | optional | 3S534 |
5 7/8" | 149.2mm | optional | 3S578 |
6" | 152.4mm | optional | 3S6 |
6 1/8" | 155.6mm | optional | 3S618 |
6 1/4" | 158.8mm | optional | 3S614 |
6 1/2" | 165.1mm | optional | 3S612 |
6 5/8" | 168.3mm | optional | 3S658 |
6 3/4" | 171.5mm | optional | 3S634 |
6 7/8" | 174.6mm | optional | 3S678 |
7" | 177.8mm | optional | 3S7 |
7 1/8" | 181.0mm | optional | 3S718 |
7 1/4" | 184.2mm | optional | 3S714 |
7 3/8" | 187.3mm | optional | 3S738 |
7 1/2" | 190.5mm | optional | 3S712 |
7 5/8" | 193.7mm | optional | 3S758 |
7 3/4" | 196.9mm | optional | 3S734 |
7 7/8" | 200.0mm | optional | 3S778 |
8" | 203.2mm | optional | 3S8 |
8 1/8" | 206.4mm | optional | 3S818 |
8 1/4" | 209.6mm | optional | 3S814 |
8 1/2" | 215.9mm | optional | 3S812 |
8 5/8" | 219.1mm | optional | 3S858 |
8 3/4" | 222.3mm | optional | 3S834 |
8 7/8" | 225.4mm | optional | 3S878 |
9" | 228.6mm | optional | 3S9 |
9 1/8" | 231.8mm | optional | 3S918 |
9 1/4" | 235.0mm | optional | 3S914 |
9 1/2" | 241.3mm | optional | 3S912 |
9 5/8" | 244.5mm | optional | 3S958 |
9 3/4" | 247.7mm | optional | 3S934 |
9 7/8" | 250.8mm | optional | 3S978 |
10" | 254.0mm | optional | 3S10 |
10 5/8" | 269.9mm | optional | 3S1058 |
11 1/2" | 292.1mm | optional | 3S1112 |
12" | 304.8mm | optional | 3S12 |
12 1/4" | 311.2mm | optional | 3S1214 |
12 1/2" | 317.5mm | optional | 3S1212 |
13 3/4" | 349.3mm | optional | 3S1334 |
14" | 355.6mm | optional | 3S14 |
14 3/4" | 374.7mm | optional | 3S1434 |
15" | 381.0mm | optional | 3S15 |
15 3/4" | 400.1mm | optional | 3S1534 |
17 1/2" | 444.5mm | optional | 3S1712 |
Product photos
Related products
Hammer size | Shank type | Recommended DTH bits diameter | Working pressure |
3.5"/3" DTH hammer | COP32, COP34, DHD3.5, MISSION30 | 90mm - 105mm | 8-30 bar |
4" DTH hammer | DHD340, QL40, MISSION40, SD4, TD40, COP44, COP44 GOLD, COP42 | 110mm - 130mm | 8-30 bar |
5" DTH hammer | DHD350, QL50, MISSION50, SD5, TD50, COP54, COP54 GOLD | 134mm - 152mm | 8-30 bar |
6" DTH hammer | DHD360, QL60, MISSION60, SD6, TD60, COP64, COP64 GOLD, COP66 | 152mm - 203mm | 8-30 bar |
8" DTH hammer | DHD380, QL80, MISSION80, SD8 | 203mm - 305mm | 8-30 bar |
10" DTH hammer | SD10, Numa100 | 240mm - 311mm | 17-24 bar |
12" DTH hammer | DHD112, SD12, QL120, Numa120 | 311mm - 445mm | 17-24 bar |
What we do Down The Hole rock drilling tools | Top hammer rock drilling tools | Self drilling anchor system | Drag bits |
| | | |
- DTH hammers - DTH bits - DTH drill pipes - Odex and Symmeric drilling | - Taper drill bits and rods - Threaded buttons bits and drill rods - Shank adapters - Couplings | - Threaded hollow anchor bars. - Accessories ( drill bit, coupling, nut, plate, centralizer etc.) | - Step drag bit (3 wings, 4 wings ) - Chevron drag bit (3 wings, 4 wings ) |
Application | Application | Application | Application |
Mining, quarry, water well drilling, geothermal drilling, construction foundation work etc. | Mining, quarry, construction foundation work | tunnel roof support, slop stability, Soil nailing, rock bolting, micropile etc. | mining, water well drilling, geothermal drilling etc. |
Our company
Our Workshop
FAQ
Q1: Are you a manufacturer?
A1: Yes, we own 2 plants to manufacture various drilling products, including TH (top hammer) drilling products, DTH drilling products, self-drilling anchor systems and drag bits.
So we are a one-stop supplier of full range of rock drilling products.
Q2: What qualifications do you have?
A2: Till 2016, we have following qualifications:
- ISO 9001:2008 quality management system;
- 3AA2 credit rating by Dun & Bradstreet;
- Honoring Contract and Keeping Promise Enterprise by AIC;
- EC examination certificate for self-drilling anchor bars;
- 2 invention patents & 6 utility patents.
Q3: Where did you export and what was your annual export amount?
A3: Till 2020 we have exported to 105 countries and our average annual export amount within recent 3 years is 30 million USD.
Q4: What kind of payment terms do you offer and what is your best payment terms?
A4: We offer different payment terms, including T/T, D/A, D/P, L/C and O/A, etc. Our best payment terms is 120 days after shipping date for our distributors and sole distributors.
Q5:Do you offer warranty on your products?
A5: Yes, for different products we offer different warranty that cover all manufacturing defects in materials and workmanship. The longest period of warranty is 2 years after shipping date.
Q6: Do you offer OEM service?
Q6: Yes, we offer OEM service if you have regular requirement.
Address:
Commercial Build Xiaweiqing Road, Yunyan District, Guizhou 550003 China, Guiyang, Guizhou, China
Business Type:
Manufacturer/Factory
Business Range:
Manufacturing & Processing Machinery, Tools & Hardware
Management System Certification:
ISO 9001, ISO 14064
Company Introduction:
ProfileGuizhou Sinodrills Equipment Co., Ltd is an international market-oriented enterprise specialized in manufacturing, supplying and services of rock drilling tools. Owning two factories and working in close collaboration with other two strategic cooperative partners, we offer a full range of drilling products. Such products are provided as top hammer drilling tools (TH), down the hole drilling tools (DTH), self drilling anchor tools, diamond exploration drilling tools and rotary drilling tools, which are widely used in mining, quarrying, well drilling and construction. All of them are compatible with other world leading brands such as Atlas Copco, Sandvik and Boart Longyear. Founded in 2002, we have experienced an enormous change and development over the past decade. Thanks to reliable quality, competitive prices, professional and valuable services, we now have grown to be a leading supplier of rock drilling tools in China. As a modern corporation, we operate strictly in compliance with the ISO9001 quality management system, and some of our products have passed European CE certification. We always adhere to the principle of " Sincerity-oriented, Credibility first", and we have been classified as a 3A enterprise by the world famous credit rating agency-Dun & Bradstreet. By the end of 2012, our products had been sold into 82 countries, such as Germany, France, Sweden, USA, Canada, Italy and Spain, meanwhile, we are gaining recognition and praise from a growing number of clients. Mission Better Solutions & Lower CostWe always strive to keep our customers satisfied by meeting their needs and exceeding their expectations. With integration of researching, manufacturing, selling and tailored financial support, we commit to providing every client with complete drilling solutions. Additionally, through comprehensive analysis and good understanding of consumer′s demand, we make every effort to assure customers of the lowest per-meter cost in all aspects from selection of solutions, design of products, purchase of materials, and technology of manufacturing to delivery of products. Vision Trust & Reliability "Drill more, Drill globally" has always been the driving force for all the staff members at Sinodrills, with hard work and success made in the past 12 years, We have evolved from a trading company to an international market-oriented specialist supplier in rock drilling tools with our own manufacturing, marketing, services and finance. We have also earned international fame and built up our worldwide network of customers from more than 80 countries and areas. We thank all customers for choosing our products and services, and we endeavor to become the most reliable supplier of rock drilling tools by continuously offering the best products and service.