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As the first step in attaching the intervention fasteners, the measurement of the drill holes from the receiving pockets is considered. On each workpiece, the attachment points of the spring-screw systems are measured, which are placed at the ends and at a distance of no more than 1.2 – 2 meters apart, depending on the size of the log in cut dimension. Each subsequent row is measured with a displacement of the attachment points by 100 – 150 mm to the left or right of the workpiece axis, relative to the attachment point below.
The drilling of the receiving pockets on the measured wooden workpieces is done using connected drills. The first part of the drill creates a passage opening for the unimpeded passage of the screw through the log, and the second part of the drill creates a socket opening for attaching the spring-screw system in the log. The drilling depth depends on the height of the workpiece because primarily a passage opening for the unimpeded passage of the screw through the upper workpiece needs to be created. The drill should be extended if its length is not sufficient.
After properly positioning the workpiece in place, the spring-screw systems must also be attached to their designated positions and screwed in until the fastenings are fully tightened. If there is a lack of proper compression afterwards, one should determine and eliminate the cause that prevents the tight joining of the workpieces, and then reattach the spring-screw systems to the receiving pockets for subsequent screwing.
The spring-screw system is screwed in using a drill mixer with a 14mm screw head attached to its chuck. Initially, the spring-screw system is screwed in until the spring is fully compressed and the gap between the workpieces is eliminated. Detailed information can be obtained from the “TEDWALDI” brochure, which provides instructions on equipment and fastening methods.
— Rotations per minute
— Reverse function
— Keyed chuck ≥ 16 mm
— Total drill length: 240 mm
— Opening diameter for screw passage: 14 mm
— Opening diameter for installation of the spring-screw system: 35 mm
— Hexagonal shank: 14 mm
— Inner hexagon: 14 mm
— Length: 90 mm
— Hexagonal shank: 14 mm
Waldihaus d.o.o.
Svetozara Miletica 43, Lokal 5
Novi Sad, Serbia
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