1830mm T51 Rock Drill Bit Extension Rod For Bench & Long Hole Drilling

Product name: Extention T51 Thread extention rod

Product category: Drilling rod

Threaded Connection: R22, R25, R32, R38, T38, T45, T51

Length: 1830mm

KINGDRILLING thread drill rods are made of high-intensity alloy steel. All the trails and threads are formed by high precision CNC machines. The thread is induced by induction hardening, then fast heating and cooling. The precision temperature controlled heat treatment equipment ensures the service life of the drill rod, improves the mechanical properties of the drill rod,

Holistic carburization increases the carbon content in the outer layer of drill rod, and hardened outer steel body. The solid thread can fit perfectly with the inner wall of the drill bits,and complete various roadway tunneling, underground mining and open pit drilling task in complex rock and terrain rough drilling with high precision and high efficiency .

KINGDRILLING thread drill rod parameters:

THREAD	Drill Rod		Length		Diameter		Weight approx kg
			mm	Foot	mm	inch
T51	Extension rod T51-Round52-T51		3050	10'	52	2	45.3
	Flushing hole 21.5mm		3660	12'	52	2	54.1
	Wrench flat 45mm		4270	14'	52	2	63
			4880	16'	52	2	71.8
			5530	18'	52	2	81.2
			6095	20'	52	2	89.4
T51	MF-rod T51-Round52-T51		1525	5'	52	2	26.2
	Flushing hole 21.5mm		1830	6'	52	2	30.6
			3050	10'	52	2	48.3
			3660	12'	52	2	57.1
			4270	14'	52	2	66
			4880	16'	52	2	74.8
			5530	18'	52	2	84.2
			6095	20'	52	2	90.4
THREAD	Guide Tube		Length		Diameter		Weight approx kg
			mm	inch	mm	inch
T51	Quide tube		1830	6'	76	3	42
	D76 for bits from 89-102ma and D87 for bits from 102-127m		3660	12'	76	3	81
			3660	12'	87	3 1/2	86

Order Guide: Thread type + Diameter + length

KINGDRILLING thread drill rod advantages:

1.High quality: High carbon steel with advantaged procession
2.Competitive price:Cheap price because of direct factory price.

3.Problems solve ability:This ability comes from our rich experiences at the drilling tools industry.

4.Fast delivery time:usually it takes 25 days for production.Only 2 or 3 days if we have stock of your request size.
5.Best quality control:We have our own experienced QC team,there will be strict inspection and testing for every order before shipping out.
6.OEM,ODM service:your own request about product will be served well.
7.Best after service:We will go to your place to check and solve the problems if there.

KINGDRILLING drill rod features:
1. Hardening treatment of the part’s surface:with longer operating life and excellent anti-wear properties.

2. Structural optimization:Strengthen the structural strength, easy to operate
3. Superior performance:Stable and reliable performance, high drilling speed

FAQ:

1. What is a drill rod?

A drill rod is a form of bar stock machined to produce tools such as drill bits, taps, dowel pins, shafts, reamers, files, punches and hammers. It's soft enough to shape but can be heated up to revert back to the hardness. Drill rods are manufactured from tool steel that has been ground to a tight tolerance diameter.

2.What is pin and box thread?

A box and pin joint, also known as tool joint, is a component of drilling pipes that act as a coupling element to make up the drill string. The joint connects with the pipe by welding or with the help of a conical thread.

3. How does drill pipe work?

Drill pipes are durable steel pipes that conduct the force to the drill bit. In many cases the drill pipe turns the drill bit, which cuts into the rock until it reaches the deposits. The last drill pipes before the drill bit are often nonmagnetic drill collars, particularly in horizontal drilling.

4. How do you harden a hardening drill rod?

HEAT TREATMENT Sections smaller than ¼” heat to 1450°-1475°F and hold until heated through. For larger sections, preheat to 1200°F, the raise to 1450°-1500°F to hardening temperature, hold one-half hour per inch of cross section. Quench in oil at 125°-150°F and TEMPER IMMEDIATELY.

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