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For Piercing/Trimming/Flanging As the cam upper plate is dual-partitioned, the cam slide can (cam slide stroke direction) be removed vertically respective to the base sliding face. As such, even when cutting blades or bending blades are mounted, installation and uninstallation is easy and work time is greatly reduced. As the cam slide can be installed and uninstalled within the Length of the unit, maintenance for the purpose of cam slide installation/uninstallation on the back of the cam unit is unnecessary, making the saving of space for the die possible. The cam slide can be removed vertically respective to the base sliding surface, making installation and uninstallation easy. As installation and uninstallation are easy, work time is greatly shortened and the space taken up by the maintenance is smaller. Cam Unit Structure of Cam Unit Work Space Behind the Cam Unit Previous Structure of Cam Units As the cam slide installation/uninstallation takes place from the back, you need to insert the cam slide (blue colored profile) into the mating profile of the base (red color). As such, space behind the unit for cam slide installation/uninstallation is necessary. Also, as the clearance of the mating aperture is small, installation/uninstallation work must take place carefully. Moreover, the return spring cannot be replaced unless the cam slide is removed. Previous Structure of Cam Units In case where there are obstacles (guide posts or castings) behind the cam unit, removing the cam slide is difficult (even when it is possible one still has to consider the space behind the unit). When there is no space, installation/uninstallation of the cam slide must take place after removing cutting tools or bending tools and removing the cam unit from the die. OAST200A-600A Series As the structure of the OILES Cam Unit (OAST200A-600A) is such that cam slide can be installed/uninstalled upward of the cam unit, the cam slide can be installed/uninstalled without removing the cam unit from the die even when there are cutting tools or bending tools installed to the cam slide and in cases where there are obstacles at the rear of the cam unit. However, there is tool space required for the installation/ uninstallation of the upper plate and spring unit. OAST200A-600A Series With the OILES Cam Unit (OAST200A-600A) installation work of the cam slide (blue colored profile) into the opening of the base (red color) can be easily carried out as the cam slide can be removed perpendicular direction to the sliding surface of the base (cam slide stroke direction). As such, because installation/uninstallation work of the cam slide can take place within the space of the entire length of the cam unit, die design is possible without having to consider work space at the back of the cam unit. Moreover, replacement of the return spring is possible without removing the cam slide. Cam Slide Insertion Direction Cam Slide Insertion Direction Stroke Direction Cam Slide Stroke Direction Cam Slide Cam slide installation/ uninstallation is difficult installation/ uninstallation possible Cam slide Cam slide installation/ uninstallation possible uninstallation is difficult Cam slide installation/ Case where the area around the cam unit is surrounded by interfering items (castings) Case where the area around the cam unit is surrounded by interfering items (castings) Interfere work space Installation/uninstallation (guide posts etc.) Obstacles (guide posts etc.) Obstacles Wall of casting 233