HHK-15 13 ton Hydraulic Knockout Punch Kit For punching holes in steel and aluminium sheets. The HHK-15 Hydraulic Knockout Punch Kit makes a perfectly clean punch without any damage to surrounding material. Unlike wobbly hole saws it will produce a dimensionally accurate hole each time. A pilot hole is drilled and the slave cylinder rod is fed through the material with the male and female punches either side. When the ram is pumped the slave cylinder draws the punches together.Perfect for race car and aeroplane fabrication and also used commonly in the heating, refrigeration and air conditioning industries. Where it comes into its own is when a hole is required on an immovable object such as a car body or air con unit and the job cannot be taken to the bench.Will cut up to 1.5mm .
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