- Motor : 370W
- Blade size :1470×13×0.65mm
- Blade speed : 45 m/min (50Hz)
- 54 m/min (60Hz)
- Cutting capacity at 90 degree :100mm(round)
- 100×150mm(rectangular)
- Cutting capacity at 450degree :60mm(round)
- 60×100mm(rectangular)
- Packing size : 730×360×450mm
- N.W./G.W.: 29/31kg
- Units/20´ container :240
When cutting metals, special band saws are required that include
coolant pumps which provide a constant flow of liquid coolant over the
blade. The coolant keeps blades cool, adding blade life. They also
include a powered wire brushwheel to remove chips and buildup from the
blade as it exits the material. Metal cutting band saws are available
in vertical and horizontal designs. These units range from manual to
semi-automatic and even automatic controls.
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Machine shop bandsaws are horizontal, vertically cutting saws. Small,
manual shop saws are usually employ a gravity-fed blade that falls in
an arc around a pivot point. The rate of descent is controlled by a
shock absorber that has an adjustable rate. When a manual saw is set up
for another cut, the operator raises the saw by hand and leaves it in a
45 degree position. The material is unclamped, moved up to hit the part
stop (which is then moved out of the way), material reclamped, and the
operator hits the rapid advance switch to lower the saw just before the
cut begins. The saw's piston is then set to cut advance, and another
cut is made.
Additional common equippment on machine shop saws include
A part stop for repeatable billet production, allowing long rods or bars to be cut into the correct billet size
A long roller bed to assist long and heavy stock feeding
Vices along the roller bed to ensure setup rigidity
Miter base that allows angled cuts
Saw braces that are adjusted to present just enough exposed saw to
cut through the work. This increases rigidity and life of the blade.
When cutting metals, a constant flow of liquid over the blade facilitates cutting by lubricating to keep the blade cool as well as preventing encrustation or smearing on the blade, prolonging blade life and making for greater cutting accuracy. Brushes or brushwheels are sometimes used to remove chips and encrustation from the blade as it exits the material. Band saws are available in vertical and horizontal designs. These units range from manually operated machines to fully automatic machines. Band speeds range from 40 feet per minute to 5000 feet per minute.
Machine shop band saws may also be horizontal or vertical. Small band saws may employ a gravity-fed blade or the rate of descent may be controlled by a hydraulic cylinder bleeding through an adjustable valve. When the saw is set up for a cut, the operator raises the saw by hand and the material is clamped in place and the saw is turned on, the blade slowly descending into the material, cutting it as the band blade moves. When the cut is complete, a switch is tripped and the saw automatically turns off.
Cutting metals with a band saw is an art form in and of itself. It requires a considerable amount of knowledge and experience to be a profitable operation. There are several variables to consider when cutting metals with a band saw. The selection of the appropriate band saw blade, type of cutting fluid, type and condition of the band saw machine and level of machine operator experience are but a few.
Many technological advancements have made their way to metal cutting band saw machines in the past few years such as computer controls. A significant breakthrough in feed rate controls has been made by Hem Saw Inc of Pryor, OK. Hem saw has pioneered computerized cutting feed and pressure controls with their CCT system that greatly enhances production rates and increases blade life. Another advancement has been the transition from variable pulleys to frequency inverters to control band speed. Berhinger and Lexas band saw machines are among those that employ this new process for controlling band speed.
Advancements have also been made in the band saw blades used to cut metals. The development of new tooth geometries and tooth pitches have produced increased production rates and greater blade life. New materials and processes such as M51 material and the cryogenic treatment of blades have produced results that were thought impossible just a few years ago. New machines have been developed to automate the welding process of band saw blades as well. Ideal computerized welding machines, Also setting and cut to length machines and contributions from other manufacturers continues to increase productivity.
