Hemingway Kits > Hemingway Toolroom > Tool Holding and Positioning > Ø7" Adjustable Flycutter
Ref: HK 2560
Compared with end-milling, flycutting is often cited as the slower and therefore inferior process for milling flat surfaces. Whilst this opinion may hold water for industrial scale work, where large volumes of material must be removed at the minimum cost, for finishing cuts in the smaller workshop, flycutting is by far the better bet.Unlike expensive endmills, your flycutter will last indefinitely. A dulled cutter can be brought back to perfection on the bench grinder by sharpening just one face. The cutting diameter can be adjusted to any surface up to 7" wide, allowing a finishing cut to be made in just one pass. Provided the head of your miller is square to the table, the resultant surface is both uniform and flat. With a light cut and a slow and consistent feed, the finish obtained on steel, iron and non-ferrous materials can look as if it has been surface ground!The design is very sturdy and the body includes an integral parallel arbor to be gripped with a collet in the miller or lathe. The kit arrives with all necessary materials together with a square 1/4" HSS toolbit. The arm, produced from 3/4" square bar, is a particularly interesting and satisfying component to manufacture! Click the image for more information.
Ref: HK 2455
As a first job for your completed Adjustable Flycutter, we are pleased to offer this "bundle" of kits with a worthwhile saving on their separate prices. The Small Surface Plate is a satisfying item to make and its size allows it to be taken onto the bench, miller or lathe bed to gauge jobs and set-ups. The photo shows the final 0.02mm (0.0008") pass over the surface plate on a Wabeco CC-F1210E with feed set at 40mm (1 1/2") per minute. Even though the spindle speed (180rpm) was a little high, the surface came out like glass. Prior to cutting, the head was trammed square to the table within 0.0002" over 5". The completed surface plate has a flatness (measured with slips and a straight edge) of better than 0.0004". Rather than hand scrapping, it was buffed with a smooth slip stone, thoroughly washed, oiled, then put straight into service.
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