STANDART PARTS CATALOG
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S PA I N High-Tech for ech for High-T your springs your springs A COMPANY OF THE KERN-LIEBERS GROUP

KERN-LIEBERS Group of Companies The headquarters of the KERN-LIEBERS group of Companies, Hugo Kern und Libers GmbH & Co. KG, is located in Schramberg in the Black Forest, with a floor space covering 53.000 m² and over 1.325 employees. The KERN-LIEBERS group of companies manufactures worldwide, with a total of 6.056 employees at 50 locations. Turnover in 2011/2012 was 541.5 million euros. KERN-LIEBERS group of companies: A Member of Kern-Liebers TMG S.A. Hugo Kern und Liebers GmbH & Co. KG Ctra. de Santiga n° 86 - 08291 Ripollet (Barcelona) Dr.-Kurt-Steim-Str. 35 - 78713 Schramberg Phone:...

KERN LIEBERS TMG KERN-LIEBERS TMG is the result of the merger of TMG and KERN LIEBERS RESORTES. The new company combines the possibilities both companies had, thus being specialized in the design and manufacture of metal parts in both strip and wire. KERN LIEBERS TMG manufactures high quality wire springs and stamped-bent parts to customer specifications for the automotive, electrical, electronics, consumer goods, white line, lighting industry, mechanical engineering and other industries. On the other hand we are the Spanish branch of KERN LIEBERS, a German group with worldwide presence at...

Products COMPRESSION SPRINGS Wire diameter: 0.20 - 3.00 mm Spring body: Cylindrical, conical, barrel-shaped, special forms Applications: Automotive, aeronautical, electro-mechanical, lighting industry and furniture industry Material: All common spring steel wires (acc. to EN 10270 part 1-2-3) Surface: Zinc coated, phosphatized, varnished, Deltatone… TORSION SPRINGS Wire diameter: 0.20 - 4.00 mm Types: Single and double torsion springs with a great variety of end forms. Applications: Automotive, aeronautical, electro-mechanical, lighting industry and furniture industry Material: All common...

STAMPED BENT PARTS Strip thickness: 0.20 - 3.00 mm Types: Acc. to drawing Applications: Automotive, aeronautical, electro-mechanical, lighting industry and furniture industry Material: All common steel strips Surface: Zinc coated, phosphatized, varnished, Deltatone STAMPED PARTS Strip thickness: 0.20 - 3.00 mm Dimensions: 200 x 200 mm Types: Acc. to drawing Applications: Automotive, aeronautical, electro-mechanical, lighting industry and furniture industry Material: All common steel strips Surface: Zinc coated, phosphatized, varnished, Deltatone COMPONENTS FOR THE LIGHTING INDUSTRY As we...

Comparison of international standards for materials Germany Material description EN Material no. Code France AFNOR GB BS Sweden SS USA ASTM Japan JIS GModule max. Temp. Use Patented drawn spring steel wire 10270-1 1.1200 SH (type C) NFA 47-301-76 5216-91 ND 1774 A227 G3521 SWC 81500 80°C High static and medium dynamic conditions Patented drawn spring steel wire 10270-1 1.1211 DH (type D) NFA 47-301-76 5216-91 HD + M 1774 A228 G3522 SWPB 81500 80°C High static and medium dynamic conditions Oil tempered valve 10270-2 spring steel wire 1.1250 VDC --- --- --- --- --- 79500 250°C Springs for...

Calculation base compression springs Formula symbol d D De Dd Dh Lo L1 L2 Ln Unit Name mm mm mm mm mm mm mm mm mm Wire diameter Mean coil diameter Outer coil diameter Arbor diameter Bush diameter Unstressed length Pre-stressed length Stressed length Max stressed length Formula symbol Sa sk n nt R F1 F2 Fn Fc Lc mm Block length τ1 s1 mm s2 Pre-stressed spring deflection mm sn sc p ν mm mm mm mm mm Total minimum distances Spring deflection to bend Active coil number Total coil number Spring rate Pre-stressed force Stressed force Max spring force Theoretical block force N/mm N N N N 2 Shear...

Calculation base tension springs Formula symbol d D De Dh Lo Lk Lh m L1 L2 Ln s1 s2 sn Unit Name mm mm mm mm mm mm mm mm mm mm mm mm mm mm Wire diameter Mean coil diameter Outer coil diameter Bush diameter Unstressed length Body length Loop height Loop opening width Pre-stressed length Stressed length Max stressed length Pre-stressed spring deflection Stressed spring deflection Max stressed spring deflection Formula symbol n nt R Fo F1 F2 Fn τ1 τ2 τn τzul Unit Name Active coil number Total coil number Spring rate Initial tension Pre-stressed force Stressed force Max spring force Shear with...

Table of contents Page(s) Compression springs 14 Endless compression springs 70 Tension springs 86 Endless tension springs 118 Torsion springs 127 Tool springs 138 Disc springs 150 Wire rings 155

Compression springs ex stock Description All stock compression springs are right wound and manufactured in accordance with DIN 2095 Grade 2. The design is in accordance with DIN 2089 Part 1. All compression springs are stress-relief tempered after the coiling process. All springs showing a setting tendency are preset cold. There is usually one closed coil per side. Above 0.5 mm wire diameter, the end coils surface is ground. The specified forces and spring deflections apply only in static or quasi-static conditions. Manufacturing compensation Outer diameter De, length Lo and maximum load Fn...

Endless compression springs ex stock Description All stock endless compression springs are right wound. The length Lo is 1000 mm. The specified forces and spring deflections apply only in static or quasi-static conditions when tempered. Material The springs are manufactured using patented drawn spring steel wire EN 10270-1-SH / DH. Spring steel with the material EN 10270-3-1.4310 is used for the rust-proof version. The tolerances for wire diameter deviation are in accordance with DIN 2076. Surface Springs made from steel wire in accordance with EN 10270-1-SH / DH are lightly oiled. Springs...

Tension springs ex stock Description All stock tension springs are right wound and manufactured in accordance with DIN 2097 Grade 2. The design is in accordance with DIN 2089 Part 2. All tension springs are stress-relief annealed after the coiling and looping process. The loop type is full German in accordance with DIN 2097 Figure 3. The loop position is optionally 180° or 270°. The loops are closed. The specified forces and spring deflections apply only in static or quasi-static conditions. Manufacturing compensation Outer diameter De, length Lo and maximum load Fn are tolerated by our...