Description
Consisting of matrix, punch and draw bolt. Round sheet metal punch with ball thrust bearing for easier wrench operation; friction between punch and screw is reduced, requiring approximately 50% less force.

Material
Special tool steel, burnished.

Application
For punching holes into sheet steel, stainless steel, aluminium and copper. Particularly useful where access is difficult, e.g. large sheet metal plates, control cabinets, fuse boxes, junction boxes, dashboards, sink basins and bodywork. Not suitable for pipework.

Operation
Can be operated using a wrench, manual hydraulics No. 834655 size 1, or a manual hydraulic drive No. 834700. From 50 mm hole diameter upwards the use of the manual hydraulic drive is recommended.

Note
Grease the pressure screw and matrix before use.
When using hydraulic tools, use draw bolt No. 834070 instead of the pressure screw.
Size 32 and 35 are suitable for holes in stainless steel sinks to attach 1/2 inch sink fittings.

Product Specification
Punch / hole diameter: 40.5 mm
Metric thread to DIN EN 60423: M40x1.5
Conduit thread to DIN 40430: -
Draw screw: M16x1.5x70
Hole diameter to be pre-drilled: 17 mm
Draw screw size / width across flats: 24
Maximum sheet metal St 37 thickness: 2.5 mm
Maximum stainless steel thickness depending on tensile strength: 1.75 mm