contractors working on the famous Welwyn viaduct in Hertfordshire have opted for
Xcalibre's Magnum - one of the fastest and most versatile hand held drills on the market.
Doncaster-based G.L. Quine are working for (R.M.G.B.) Rail Track May Gurney Birse
Partnership) on the 40-span 300m long viaduct which carries the main East Coast rail line.
The work, which is part of Rail Track's extensive programme of repairs and maintenance,
involves drilling and stitching the pier faces and soffits on the 30m high structure.
The decision to use the Magnum hand drill, Delta Drive and power units from Coventry
based hydraulic drilling specialists Xcalibre was made after extensive testing of all
Xcalibre's managing director Keith Skinner said:
"Magnum has three key advantages over many of its competitors. It is extremely
fast, its design specifically eliminates the sort of snagging you get with electrically
operated hand drills, making it especially safe to use, and it requires virtually no
"In addition it can be used almost anywhere - even underwater. It is ideal for the
sort of challenges thrown up by the Welwyn viaduct arches since it is reliable to use,
even when held at acute angles. Because it has been designed for use in and out of water,
its performance will not be affected by water failing on to it from the roofs of the
The Magnum comes in four different model sizes, ranging from the Mag5 at 600rpm to the
Mag24 at 2400rpm. Operated by petrol, diesel or 11O volt power units, its unique design
incorporates no electrical components, giving it high reliability.
"Magnum has been designed to be safe, easy and extremely efficient. The impressive
speeds of the hand drill have been achieved using controlled hydraulic action combined
with a built-in safety valve to cut snatch or kick associated with electrically operated
"It makes only 25 per cent of the noise of an equivalent electric drill and,
because it is spark free, is safe for use in hazardous environments."
Magnum is equally reliable, even when operated upside down, in confined spaces or in
the great outdoors. Its flexibility makes it perfect for large or small, deep or shallow
"The hydraulic action extends the life of the diamond core bits - helping to make
Magnum an economic choice for use across a wide range of materials. Optional rig mounting
is also available."
Magnum hand drills can be used for a variety of tasks, including; railing and fencing
bolts, heating and venting duct installation; plumbing and pipe installation; general
fixing holes; holes for telecommunications ducts; trench reinstatement sampling;
underwater pier refurbishment; factory machinery installation; sewer pipe drilling for
branch fitting; inverted drilling in tunnels; drilling in hazardous environments.
At Welwyn viaduct, it has proved its worth. Site foreman for GL Quine, Mr Malcolm
Gleaden, who has 17 years experience, said:
"The Magnum is the fastest and most efficient drill I have ever used and coupled
with Delta Drive Diamond core bits has put us nicely ahead on our programme of works"
GL Quine are regular specialist contractors on rail related structures.
Jane Grant on 01926 624994