contractors
plant
CONCRETE DRILL
Dentool Ltd., Gosforth Industrial Estate, Newcastle-upon-Tyne, UK, have developed a self-contained con- crete core diamond drill for cutting through steel reinforcing bars. It has its own water collection and recircula- tion equipment, a vacuum pick-up. magnetic separator for removing metal filings, and a weir to extract abrasives. Power requirements are 110 or 240 V AC.
The tool is placed over the pilot hole and firmly held by magnets. The drill head is lever-operated to give
ble-free gear box. It is supplied with one set of four finish blades and one set of four float blades, which are re- versible.
A heavy-duty sliding sheave clutch. stops the machine the instant the
A trapped-air design, fully enclosed. hydraulic system needs less main- tenance. Tandem pumps combine to operate the dozer lift circuit, and in- dividually provide hydraulic power to the tilt cylinder and ripper circuits.
Either a two-speed forward and re- verse power shift transmission or a six- speed forward, three-speed reverse direct drive unit is available. For the
Dentool diamond drill
maximum control and speed. In opera- tion, cooling water is fed to the dia- mond bit and drawn back through the water collection unit to the recirculat ing tank, where metal filings and abra- sives are separated and the clear water fed back to the drilling head. The water collection units are specially de- signed so that the machine can drill horizontally into the wall or vertically into the ceiling with only little loss of
water.
Drill hole sizes through concrete and steel can vary from 1⁄2 in. to 3 in. diameter.
FINISHING MACHINE
An area 3 ft. in diameter is finished with every rotation of a new heavy- duty concrete trowelling machine now being produced by Stow Manufactur- ing Co., 627 Shear Street, Binghamp- ton, New York.
The machine, model 36G641, has a 6 h.p. petrol engine and a rugged, trou-
Far East BUILDER, May 1971
36G641 trowelling machine
operator releases the handle, but the engine does not shut off. This feature also allows the engine to be started up at any throttle position including full throttle. A stationary guard ring allows the operator to work close to walls and obstructions.
Additional features include a long adjustable handle which gives greater ease of manoeuvring, and a handle- mounted blade pitch control knob which lets the operator instantly ad- just the pitch of the blades.
TRACTOR
The new HD-11 Series B crawler tractor introduced by Allis-Chalmers Construction Machinery Division, 3000 South 6th Street, Springfield, Ill., USA, is a major redesign of the HD-11, featuring styling changes, in- creased horsepower, improved cooling and hydraulic systems and heavy-duty drive train.
A turbo-charged 516 cu.in. diesel powers the machine. Flywheel horse- power ratings have been increased to 140 for the power shift model and 125 for the direct drive version. A larger radiator, increased fan diameter and redesigned grill have improved air flow and increased cooling capacity.
HD-11 Series B crawler tractor
power shift model forward speeds are 2.7 and 5.1 m.p.h. and reverse speeds are 3.1 and 5.8 m.ph. A single stage, rotating-housing torque converter is fitted on the power shift machine and an oil-cooled clutch on the direct drive model.
A strengthened main frame is strad- dle-mounted to an oscillating beam which equally distributes machine weight to each track frame. Track gauge is 74 in. and length of track on ground is 92.1 in.
A new single lever dozer control located near the right arm rest com- bines both the tilt and raise functions.
COMPACTORS
Two heavy-duty rubber-tyred com- pactors are being marketed by the Clark Equipment Group and its S.E. Asia distributors. Designated the Clark Scheid RW 210 and RW 211, they are self-propelled machines, each with a total weight of 46,000 lb. Individual wheel load for both models is 6600 lb.
Both machines are equipped with dual controls and dual operator seats for better operating control when compacting on confined sites, and alongside obstructions.
The RW 210 is a four-wheel-drive compactor while the RW 211 features all-wheel-drive. Both machines are powered by a six-cylinder, air-cooled Deutz F6L 514 diesel with 139 maxi- mum brake horsepower at 2300 rpm. With its all-wheel-drive, the RW 211 is
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