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Super performance rock drill tools drill bits drill rods shank adapter coupling sleeves extension rods MF rods
Feature of the extension rod MF rod:
Drill rod using thread system. Drilling precision can be further improved by using this as the first rod in a normal drill string. Furthermore, since this is a speed rod design it will produce straighter holes and at least 10% higher penetration rate in good rock conditions compared to rod and coupling sleeve combination system.
Widely used in drifting, tunneling, benching, and long hole drilling
High strength chromium-molybdenum steel with high fatigue strength and excellent wear resistance
Type: Hex. Drifter Rod, Extension Rod, Speed Rod, MF-Rod
Color: Based on Customer requirements
Material: Tungsten carbide and high strength alloy steel
Processing: CNC milling and proprietary heat treatment process
Advantage of the extension rods MF rods:
Extension rods are one major spare part in terms of drill application area, there are two shapes of extension rods, one is round type, another one is hexagonal type. But all extension rods are threaded and made by hollow drill steels, this means usually extension rods are hollow. This hollow hole are usually named flushing hole, used for transmitting water or air during drilling. Two ends threads can be used for connecting couplings, shanks, couplings or bits. Typically two ends of extension rods are male, while sometime one end is male and another one is female, then we call it M/F rod. We need couplings to connect extension rods, while for MF rods, male and femal rods, because one end is female, so couplings are not necessary.
Usually for extension rods,there are R22,R25,R28,R32,R38,T45,T51,threads,and
different lengths of rods are available from 1000mm to 3660mm usually
Parameter of the extension rod:
We are looking for our sole agent in your district, high quality products with cheap price, will surely make you competitive in your market! Let's work together, honey!
Q1.Why choose us?
A1. Our technique and team is top-classed in China. We are confident to provide produts quality which is equivalent to worldwide factories drill bit.
Q2. Where are our products applied to?
A2.Mine, tunnel,slope,foundation pit.
Q3. Do you have different quality for different kind of stone?
A3. Yes, according hardness of stone and stone’s feature, we have different teconology respectively.
Q4. If we need technical support, can you offer us?
A4. Yes, we have an experienced team, offering our customers additional benefits with specific advice, by our product managerment staff, engineers and technicians.
Q5. Do you offer free samples?
A5. Normally we do not offer free samples, but we could properly adjust according to detailed requirement.
Q6. Is there cheap shipping cost to import to our country?
A6. For small order, Express will be the best.
And for bulk order, sea ship way is best but take longer time.
For urgent orders, we suggest via air to airport or by Express send to your door.
Q7. Which Express company you send? How many days we can receive?
A7. We are official partner of TNT, UPS, DHL, Fedx. it will take only 3-5 days after we sent.
Q8. When you can reply to me when I send you an Inquiry?
A8. We promise to reply within 24 hours( including holidays) on receipt of your inquiry.
