Keyway groove broaching tool 2150

Premium "Swiss Made" broaching tool holders and broches for your Turning-, Swisstype- and Milling machine. Through the ingenious principle, the impact force is reduced to 80% which increases the life of your machine significantly. Centering the broach Nothing is more important than having the cutter centered as close as possible to the center of the workpiece. Improper center setting will cause uneven hole confi gurations, oversize holes and spiralling. For an easy setting use our gages 6189-280 or 6199-550. Drilling the hole In general, we recommend drilling the hole 1% larger than the largest of the areas measured mass. Wherein material having a lower strength, the bore can be reduced. For hex and square broaching, the depth should be 1.3 to 1.4 times the profi le depth. For TORX profi le broaching, the depth should be 1.8 to 2 times the profi le depth. Broach pre-guidance A chamfer, slightly bigger than the largest dimensions of the broach, is essential for easy starting of the broach. When exact concentricity is required, drill a pre-bore equivalent to the broach dimensions across corners. This keeps the broach concentric when broaching operation starts. Broaching rotation speed Rotational speed has almost no effect on cutting speed and tool life. However, at high speed, cutting edges of the broach tend to mill the material when starting causing tool wear. Therefore, start broaching operation at a slow rotation of 300 RPM and a feed of 0.1 mm/RPM until the broach is touching the material, then increase speed up to 2000 RPM and the feed to the result of your calculation (see next paragraph).