Walter is launching a monoblock boring bar with optional second coolant hole for the first time with its new G1221-P grooving boring bar with precision cooling. The bar has two coolant exits. One of these allows the coolant to exit the insert top clamp directly to the cutting edge in the radial groove, thus giving precision cooling. The other exit at the front of the bar can either be left open to evacuate chips out of a blind bore, or sealed off in when in a through-bore to provide even greater supply to the cutting edge. An O-ring is recessed into the bar clamping diameter to prevent pressure loss and provide leak-free coolant supply to the cutting interface. According to the manufacturers, this is particularly advantageous on machines where coolant pressure is low. The boring bar has been designed for recessing and internal grooving. Another merit is seen in the fact that it can be used in both the normal and overhead position. The boring bar with insert widths of 2, 3 and 4 mm is suitable for internal grooves from minimum diameters of 16 mm and for grooving up to depths of 10 mm in all ISO material groups.
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Reliable internal grooving and recessing
The precision-cooled Walter monoblock boring bar G1221 P now comes with an optional second coolant hole for flushing the chips in blind holes.
27 Jul. 2017
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