KEYWAY BROACHES Simple application The only thing needed is a press (arbor press) For broaching tools for groove widths 2 to 25 mm there are 6 different back widths to

KEYWAY BROACHES Simple application The only thing needed is a press (arbor press) For broaching tools for groove widths 2 to 25 mm there are 6 different back widths to VI which are engraved on the guide bushes. Each tool with fits in each bush each tool with fits in each bush etc. The standard bushes are available for each back width in the most typical diameters from 10 to 150 mm. Using the broaching tools Take the guide bush corresponding to the hole diameter in the workpiece. Then select the broaching tool with the corresponding tooth width (available in tolerances JS9 and P9) and push it into the guide groove or bush. It must slide freely until the first tooth contacts the workpiece. Now set the workpiece bush broaching tool unit under the press tappet. Once you have ascertained that the broaching tool is vertical and perpendicular press the tool through the workpiece. The larger broaching tools require several passes to achieve the desired groove depth. Thus inserts are delivered with these broaching tools. Make the first pass as described above and clean the chips from the tool. The place an underlayer in the guide groove insert the tool and push it through the workpiece again. Lubrication is essential The broaching tools should be provided with a large amount of good quality cutting oil (see 69 270 in this cata-log) during the entire broaching process. When broaching square or hexagonal through holes a pilot bore is needed. On standard broaching tools the pilot bore is somewhat lar-ger (0.3 to 1.0 mm) than the lateral edge. This means the side edge has a radius in the middle. Full square broaching tools have a pilot bore with a diameter corresponding to the edge length. 011 965 HSS push broaches For making keyways according to DIN 6885 can be used on hand presses and broaching machines faster and more precise broaching operation with low setting up costs specially ground teeth ensure Clean surfaces guide bushes and additional inserts enable precisely centred and dimensionally correct keyways suitable for machining steel cast iron aluminium brass etc. the appropriate number of additional inserts for the number of strokes are included with the broaching tools (number of strokes 3 2 inserts) - M Li 18 x 11 037 52 - 72 20 - 150 387 1933 4 V 56 NORGAU Cutting tools