Imperial Bi-Metal™...a family of the most productive band saw blades you can buy.
■ Faster cutting rates ■ Longer band life ■ Easy welding ■ Higher accuracies
■ Increased fatigue resistance • Greater abrasion resistance • Uniformly hard cutting edge • Consistent cutting rates ■ Uniform set wear ■ Uniform band life Hardened hss cutting edges on a flexible steel backing The Imperial Bi-Metal blade offers the best of both worlds. You get all of the advantages of hardened hss cut- ting edges, electron-beam welded to a safe, long lasting flexible steel backing that will withstand fatigue for as long as the teeth are useable. DoALL developed the Imperial Bi- Metal high-speed steel band saw blade to eliminate the compromise between the metallurgical character- istics required for hard, tough cutting edges, and those required for a fatigue resistant flexible back. With the Imperial Bi-Metal, the best of several metals for each pur- pose are joined by electron-beam welding into single band. As a result cutting rates can be increased up t~ 50%, and blade life is up to four times longer. The blade is also ex- tremely safe to use. If broken it will not shatter. ' Harder, longer lasting, more uniform cutting edges The superior high-speed steels used in DoALL's Bi-Metal blades provide the hardest possible cutting edges. Microstructure of the steel compares to that in the highest quality hss end mills, taps, reamers and drills. Teeth are uniformly hardened from their tips to the point at which they are joined to the flexible backing. The en- tire manufacturing process is pre- cisely controlled and fully automated to ensure repetitive quality. Hard- ness is consistent, tooth-after-tooth, blade-after-blade. Set is guaranteed within 0.002 in. (0.05 mm) accuracy. Higher tensioning means longer life The high-flex backing material used on Imperial Bi-Metal blades allows higher band tension, and lasts longer without fatigue failure. Blades are easier to weld, and top weld quality 8
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is easier to achieve. On a 1 in. wide (25.4 mm), 0.035 gage (0.9 mm) blade for example, up to 30,000 lb/sq in. (2100 kg/cm 2 ) tension is recommend- ed. This assures higher cutting rates ...as much as 50% in some cases... better cutting accuracy and longer blade life. The backing material and its heat treatment provide flex life and wear and abrasion resistance to match the ~apabilities and durability of the cutting e~ge. The backing material is also easily weldable, a decided ad- vantage_ to users who purchase their blades 1n coils for cut-off and con- tour sawing work. Special welders are not required.
The blade worth resharpening The full-depth tooth hardness and long flex life of Imperial Bi-Metal blades makes from one to four re- sharpenings a profitable practice. Tha~'s because you restore original ~utt1ng rates, and still have enough life left in the blade to offset the resharpening cost. Choose the blade that best suits your needs. Different high-speed steels and different heat treatments are used t_o provide Imperial Bi-Metal bl_ades tailored to job requirements. ~ive _types are now available, as escnbed on the facing page. Choo~e from five types of Imperial Bi-Metal blades
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