Abstract: A nibbling tool (11) adapted to incrementally remove material from an edge of sheet material (96). The nibbling tool (11) comprising a punch (71) adapted to reciprocate within a die (81). The punch (71) is configured to define a substantially radial contact surface (78) having a peripheral edge (79). The die (81) comprises an elongate guide for guiding reciprocation of the punch (71). The die (81) has a slot (87) which is adapted in use to receive said edge of the sheet material (96) and which is so positioned that the radial contact surface (78) on the punch (71) is caused to reciprocate across the slot (87). The slot (87) comprises a support surface (88) adapted to provide support to the sheet material (96) such that in use the peripheral edge of the contact surface (78) is caused to engage the sheet material (96) and cause it to be pressed against said support surface (88) to cause the incremental removal of material from the sheet (96).

Abstract: A nibbling tool (11) adapted to incrementally remove material from an edge of sheet material (96), the nibbling tool (11) comprising a punch (71) caused in use to reciprocate within a die (81) by drive means (14), the punch (71) comprising a generally elongate cylindrical member having a first diameter and having a waisted portion (74) disposed towards the work end, the waisted portion (74) defining a second, reduced diameter, the punch (71) having an abrupt change between the second, reduced diameter and the first diameter to define a substantially radial contact surface (78) having a peripheral edge (79), the die (81) comprising an elongate guide for guiding reciprocation of the punch (71) and having a slot (87) proximate a work end of the die (81) adapted to expose the punch (71), the slot (87) adapted in use to receive said edge of the sheet material (96) and positioned along the die (81) so that at one point of the stoke of the reciprocation of the punch (71) the waisted portion (74) of the punch (71) is