R25 mm/Mf Rod, Extension Rod

• Customization: Available
• After-sales Service: Yes
• Warranty: Yes
• Model NO.: R25/R32/R38/T38/T45/T51/T60
• 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 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

Thread	Ref.	Rod type	Length
			M-M		M-F
			mm	feet	mm	feet
R25	B25/H25	Hex.25	915-5525	3 ~ 18	915-5525	3 ~ 18
R28	B28/H28	Hex.28	915-5525	3 ~ 18	915-5525	3 ~ 18
R32	B32/H32	Hex.32	915-5525	3 ~ 18	915-5525	3 ~ 18
R32	D32	Round32	915-5525	3 ~ 18	915-5525	3 ~ 18
R32	B35/H35	Hex.35	915-6400	3 ~ 21	915-6400	3 ~ 21
T38	D38	Round39	915-5525	3 ~ 18	915-5525	3 ~ 18
T45	D45	Round46	915-5525	3 ~ 18	915-5525	3 ~ 18
T51	D51	Round52	915-5525	3 ~ 18	915-5525	3 ~ 18
T60	D60	Round 60	1830,4265	6, 14	1830,4265	6, 14

Product advantage
1.Material are developed by cooperated with National & Local Joint Engineering Laboratory for High-performance Metal Structure Materials and Advanced Manufacturing Technology to improve the fatigue resistance of drilling steel.
2.Material is from Baosteel with strict process of steel smelting and rolling: Refining - Vacuum - Continuous casting - drilling hole method - surface peeling to control the content of non metallic inclusion and harmful element.
3.Strictly control precision thread process to avoid thread too hot and broken effected by the high vibration and shaking of thread part when it works.
4.Heat treatment: Fully Carburization - Air cool quenching - tempering. It make the rod keep high toughness and improve surface harness and whole strength as well.
5.Thread strengthen: enhance the thread parts to improve the wear-resistance and longevity of the rod.

About us
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

Detailed Image