Hyd-Mech H-40, Operation And Maintenance Manual

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H40
SECTION 2B, SAW CUTTING CONTROLS
This section has been prepared to give the operator the ability to set up the saw for most cutting situations.
The saw is equipped with variable speed control and hydraulic feed control, as well as an extensive door chart to
guide the operator in the correct setting of these controls.
BLADE BASICS
Technology is rapidly changing all aspects of production machining. Metal cut-off is no exception. The
advances made in the bandsaw blade industry have definitely brought down the cost per cut, despite the three
fold higher price of high technology blades.
Variable pitch, bi-metal blades (like the bi-metal blade supplied with the H-40 saws) last much longer, cut
faster, and more accurately than conventional carbon steel blades.
In order to take advantage of the superiority of bi-metal blades, it is critical to properly “break-in” a new blade.
This is accomplished by taking two or three cuts through solid four or five inch diameter mild steel at an
extremely slow feed rate. (Utilizing a very slow blade speed is recommended)
These two or three slow cuts sufficiently lap (polish) the new blade so that it does not snag the material being
cut. Proper break-in will alleviate blade vibration, improve surface finish, accuracy, and blade life.
After “break-in” the following six points must be closely monitored to ensure long blade life:
1. Proper blade tension should be maintained. (See SECTION 3, Maintenance & Troubleshooting)
2. Generous coolant application is essential with almost all materials. A high quality and well mixed coolant
will many times extend blade life, and also increase cutting rate and cut quality. On those materials where
coolant is undesirable for cutting, a slight coolant flow or periodic oiling of the blade is necessary to prevent
the blade from being scored by the carbide guides.
3. The stock being cut must be securely clamped in the vises.
4. The proper feed force limit must be set.
5. The proper blade speed must be selected.
6. The proper feed rate must .