Springs of ZNN-4 of torsion

Springs of ZNN-4 of torsion

Physical parameters

• d (Diameter of a wire): this parameter specifies thickness of the wire used for production of a spring.
• Dd (Core): this parameter corresponds to the maximum diameter of a core which can be inserted into a spring. The tolerance for this parameter makes +/-2% (for data).
• Di (Internal diameter): internal diameter of a spring can be calculated by subtraction from value of external diameter of a spring of size of diameter of the wire increased by two. Internal diameter of a spring decreases to the core size during its use. The tolerance for this parameter makes +/-2% (for data).
• De (External diameter): external diameter of a spring can be calculated by addition to value of internal diameter of a spring of size of diameter of the wire increased by two. External diameter of a spring of torsion decreases when using. The tolerance for this parameter makes +/-2% with the admission +/-0,1 mm.
• L0 (Free length): ATTENTION: free length decreases in a spring usage time. The tolerance for this parameter makes +/-2% (for data).
• Ls (Length of shoulders): this length is measured from the axial line of a round to edge of a shoulder of a spring of torsion. The tolerance for this parameter makes +/-2% (for data).
• An (maximum corner): the maximum angle of rotation of a spring (in degrees). The tolerance for this parameter makes +/-15 degrees (for data).
• Fn (Maximum load): the maximum load which can appear on edge of a shoulder. The tolerance for this parameter makes +/-15% (for data).
• Mn (Maximum torque): the most admissible torque (Newtonian * mm). The tolerance for this parameter makes +/-15% (for data).
• R (Elasticity slope): this parameter defines counteraction of a spring at its use. A unit of measure of slope of elasticity is Newton * mm/degree. The tolerance for this parameter makes +/-15% (for data).
• A1 & F1 & M1: (a corner of a torque or under loading): the following formula allows to calculate a corner depending on a torque: A1 = M1/R. For calculation of a torque, proceeding from loading, use the following formula: M = F*Ls.