High Performance Extension Rod for Tophammer Drilling

• Customization: Available
• After-sales Service: Yes
• Warranty: Yes
• Model NO.: extension rod
• Quality: Best
• Rock Formation: Soft,Middle,Hard
• Use: Water Well Drilling,Mining,Exploration and etc.
• Material: Alloy Steel
• Transport Package: Ply-Wooden Cases
• Specification: R32, T38, T45, T51, T60
• Trademark: sollroc
• Origin: Chna(Mainland)
• HS Code: 84314320
• Production Capacity: 5000PCS/Month

Product Description

Product Introduction
In Top Hammer Drilling the hammer produces a percussive force on the drill rods or tubes, which is transmitted to the drill bit. The feed device is usually attached with a hinged boom to a mobile unit. The percussive system strikes the drill rod, for example 2,000-5,000 strikes per minute, and the rotation speed can be, for example, 60-200 rounds per minute. Together these elements make it possible to drill holes in the hard rock. The excess material (cuttings) is flushed up from the bottom of the hole by means of pressurized air or water. Top hammer drills are primarily used in mining, construction and quarrying of rock material. Top hammer drilling, combined with the "drill and blast" method, makes the whole excavation process extremely efficient.
Top hammer drilling tools can be applied in such as surface civil engineering, quarrying, dimensional stone quarrying, underground mine development, rock bolting, tunneling and production drilling.

Top hammer drilling principle
1. When the piston hits the shank, kinetic energy in the piston creates a compressive wave in the string of drilling tools, that will cause the bit to penetrate the rock
2. Piston velocity at impact ≈ 10m/s but the compressive wave in the drill steel travels at a velocity of 5180 m/s (velocity of sound in steel)
3. The bit is forced forward and penetrates the rock around 1.0 mm
4. Part of the energy not used to penetrate the rock goes back as a tensile wave and part of it as a compressive wave

Technical Parameter

T38 Extension Rods	Length		Diameter		Thread	Weight
	mm	ft	mm	inch
	1220	4'	39	1 17/32"	T38	10
	1525	5'	39	1 17/32"	T38	12.4
	1830	6'	39	1 17/32"	T38	14.2
	2435	8'	39	1 17/32"	T38	19.1
	3050	10'	39	1 17/32"	T38	24.1
	3660	12'	39	1 17/32"	T38	29
	4000	13'	39	1 17/32"	T38	31.7
	4305	14' 1 1/2"	39	1 17/32"	T38	34.2

About us
Sollroc , with more 10 years of experience ,is one of the professional manufacturer and supplier of high performance rock drilling tools like: DTH hammers and bits, RC hammers and bits, DTH drill rods and top hammer drilling tools. Our tools are widely used in different drilling applications including mining, quarrying, water well drilling, geotechnical industries and etc.

We are dedicated to offering our customers only premium quality products and services to enable them to achieve the highest possible productivity for their business and projects. If you are looking for the best, fastest and most productive drilling tools in the world, Sollroc should be your best choice and preference.

Delivery & Package
Delivery: By air, By sea or By express
Package: Ply-wooden cases + Pallet

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