Patent No. EP3698897 (titled "Coiling Tool For Spring Coiling Machine") was filed by WTH Laqua GmbH on Feb 21, 2019. The application was issued on Dec 27, 2023.
A coiling tool for spring coiling machines comprises a bending roller holder featuring a contact plate and a support collar. A bending roller, equipped with a radially circumferential winding groove, is rotationally fixed to the contact plate via a clamping screw. The bending roller includes a base with a non-circular cross-section on the side facing the contact plate. The support collar possesses a contact surface that corresponds to and partially encloses the base's outer jacket surface. Optional embodiments include notches on the support collar's contact surface for engaging base edges or teeth to enable fine rotational adjustment. Additionally, the bending roller may feature a central stepped bore to fully integrate the clamping screw head.

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