The latest development for targeted operations

The Sandvik Alpha 330 Top Hammer Drilling Tool

High penetration rate

Advanced precision in collaring

Superior drilling accuracy

Faster and easier uncoupling of bits

Reduced machine downtime

The Sandvik Alpha 330 goes from strength to strength

Today’s rock drills generate almost unlimited impact power. We need to control that power and, most importantly, ensure that it is transmitted into the rock as efficiently, accurately and economically possible. That is the job of the rock drilling tools, which is why we continue to develop the Sandvik Alpha 330 tool system – to bring the best solution for performance and productivity.

Well-proven Hex 35 section

The drill string rod/bit connection features an entirely new thread design and the rod itself is of the well-proven Hex 35 section, with a T38 thread at the shank end.

The new short thread design on the hexagonal rods in the tool system result in a rigid, integrated powerpack drill string with superior resistance to bending stresses, improved bit guidance and perfect energy transfer. The sturdy thread is well guided inside the bit skirt, offering high precision in collaring – even in complex rock formations and against uneven surfaces.

Revolutionary shorter thread key for greater stress reduction

A snug interface at this crucial point at the rear of the connection greatly improves the rigidity of the joint. The bit skirt covers the thread completely in the Sandvik Alpha 330 connection, no part of the thread itself is exposed to sandblasting, reducing the risk of corrosion-fatigue.

To match the increased energy output from modern high-power rock drills in drifting
and bolting, the new Sandvik Alpha 330 has been designed and dimensionally optimized to replace R32 connections (also a Sandvik innovation) which has been
the dominant Ø 45 mm system todate.

Inside view showing the Sandvik Alpha 330 connection

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Using advanced FEM programs we are able to simulate the application of our designs long before the solution touches the rock.

Advanced analysis has been used to simulate and locate critical bending stresses of various designs to arrive at an optimally dimensioned rod/bit connection.

New design for lower costs per drillmeter

Thread length & diameter means at least 30% better service life on drifter rods when compared to R32. More steel for higher fatigue strength makes the connection rigid compared to the R32, to give exact collaring and straighter holes.

Extended life:: Shank- adapter
Extended life:: Coupling
Extended life:: Drifter rod
Extended life:: Drifter bit

20%

lower cost for drilling tools

What the Sandvik Alpha 330 system users are saying

After using the Sandvik Alpha 330 tool system, customers in both mining and tunneling applications all over the world have identified the following advantages:

Extended rod life, at least 30%
Longer shank adapter life
Excellent hole accuracy

Increase in service life on drifter rods compared to R32

R32: +/-0%
Alpha Brazil Mining: +35%
Alpha S. Korea Construction: +40%
Alpha Russia Mining: +58%
Alpha Brazil Construction: +70%
Alpha Australia Mining: +80%

The Sandvik Alpha 330 keeps you at the top of the game

1.
New Short thread design and hexagonal rods result in a rigid, integrated drill string optimized for 43 to 51 mm drilling.
2.
The new short thread design offers increased precision in collaring.
3.
The rigid drill string results in straighter holes, permitting optimum drilling patterns, better hole accuracy and higher rates of advance.
4.
Exact collaring and straighter holes are prerequistes for productive drilling with less over break and lower overall costs.
5.
Less downtime of machinery resulting in better scheduling through optimal productivity.