Boston Concrete Cutting
288 Grove Street, Unit 110
Braintree, MA 02184


781-519-2456
info@bostonconcretecutting.com
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Concrete Cutting Sawing Norton MA Mass Massachusetts

Welcome to BostonConcreteCutting.Com

“We Specialize in Cutting Doorways and Windows in Concrete Foundations”

Are You in Norton Massachusetts? Do You Need Concrete Cutting?

We Are Your Local Concrete Cutter

Call 781-519-2456

We Service Norton MA and all surrounding Cities & Towns

Concrete Cutting Norton MA         Concrete Cutting Norton Massachusetts

Concrete Cutter Norton MA           Concrete Cutter Norton Massachusetts

Concrete Coring Norton MA          Concrete Coring Norton Massachusetts

Core Drilling Norton MA                 Core Drilling Norton Massachusetts

Concrete Sawing Norton MA         Concrete Sawing

Concrete Cutting MA                      Concrete Sawing Norton Mass

Concrete Cutting Norton Mass      Concrete Cutting Norton Massachusetts           

Concrete Cutter Norton Mass        Concrete Coring Mass       

Core Driller Norton MA                   Core Drilling Norton Mass

Fig. 133 shows a vertical gasoline engine made by the International Harvester Company. The quantity of gasoline consumed in ten hours, on an average, is about one gallon for each rated horse-power for any given size of engine. At 15 cents per gallon for gasoline, the hourly expense per horse-power will be 1.5 cents. When the concrete require hoisting, it is done sometimes by the same engine that is used in mixing the concrete. It is generally considered better practice on large buildings to have a separate unit to do the hoisting. If it is possible to use a standard hoist, it is usually economical to do so. These hoists are equipped with automatic dump buckets. Fig. 134 shows a standard double-cylinder, double-friction-drum hoisting engine of the Lambert type. This type of engine is designed to fulfill the requirements of a general contractor for all classes of derrick work and hoisting. Steam can be applied by a single boiler, or from a boiler that supplies various engines with steam. The double friction drums are independent of each other; therefore one or two derricks can be handled at the same time, if desired. This hoist is fitted with ratchets and pawls, and winch-heads attached to the end of each drum-shaft. The winch-heads can be used for any hoisting or hauling desired, independent of the drums. These engines are also geared with reversible link motion. A friction crab hoist of the latest type is illustrated in Fig. 135. The same engine that drives the concrete mixer can be used to operate the crab hoist. By means of a sprocket- wheel and chain, this crab hoist can be geared to any engine, and, when so geared, is ready for hoisting purposes. The hoisting drum is controlled by one lever.

This hoist can be run by an electric motor, if desired. On account of the low price, the friction crab has found much favor with contractors. Very often the cycle of operation of a hoist is of an intermittent character. The power required is at a maximum only a part of the time, even though the hoist may be operated practically continuously. From an economical point of view, these conditions give the electric motor-driven hoist special advantages, in that the electric hoist should always be ready, but using power only when in actual operation and then only in proportion to the load handled. The ease with which a motor is moved, and the simplicity of the connection to the service supply, requiring only two wires to be connected, are also in favor of the electric motor. Fig. 136 shows a motor made by the Westinghouse Electric & Manufacturing Company, which is designed for the operation of cranes, hoists, or for intermittent service in which heavy starting torques and a wide speed variation are required. The frames are enclosed to guard against dirt and moisture, but are so designed that the working parts may be exposed for inspection or adjustment without dismantling. These motors are series-wound, and are designed for operating on direct-current circuits.

The motor frames are of cast steel, nearly square in section and very compact. The frame is built in two parts, and so divided that the upper half of the field can be removed without disturbing the gear or shaft, making it easy to take out a pole-piece and field-coils, or to remove the armature. Fig. 137 shows the controller for this type of motor. These controllers, when used for crane service, may be placed directly in the crane cage and operated by hand, or mounted on the resistance frames outside the cage, and operated by bell cranks and levers, so that the attendant may stand closer to the operating handles and away from the contacts and resistance. Poly-phase induction motors are being used to some extent for general hoisting and derrick work. These motors may be of the two-phase or three-phase type; but the latter are slightly more efficient. These motors are provided with resistances in the rotor a circuit, and with external contacts for varying the same.

Are You in Norton Massachusetts? Do You Need Concrete Cutting?

We Are Your Local Concrete Cutter

Call 781-519-2456

We Service Norton MA and all surrounding Cities & Towns

Boston Concrete Cutting | 288 Grove Street, Unit 110, Braintree, MA 02184 | 781-519-2456 | info@bostonconcretecutting.com