SCHNORR precision disc springs and serrated safety washers

Engineered spring solutions by SCHNORR (Germany): standard DIN EN 16983 disc springs, type S and VS serrated washers, DIN 6796 load washers, and K bearing springs.

SCHNORR: precision disc springs and safety washers

Adolf Schnorr GmbH & Co. KG has engineered and manufactured precision disc springs and safety washers in Germany since 1908. Based in Sindelfingen, the enterprise produces dependable spring and fastening components designed for demanding mechanical and automotive assemblies.

Over a century of specialized manufacturing leadership in advanced spring connection systems
Production facilities in Germany adhering to rigorous metallurgical and tolerance criteria
Comprehensive catalog of disc springs and serrated safety washers for heavy axial operations
Qualified engineering assistance for spring stack calculations and custom technical sizing

SCHNORR disc springs engineered to DIN EN 16983 standards

SCHNORR disc springs deliver exceptional force capacity within minimal axial space. Manufactured in compliance with DIN EN 16983 across groups 1, 2, and 3, these components provide predictable load-deflection behavior and superior fatigue life during intense dynamic cycles.

Extreme force generation combined with compact overall dimensions inside modern equipment
Flexible stacking in parallel, series, or combined layouts to achieve specified force curves
Precision machined contact flats and edges on group 3 springs ensuring uniform force input
Exceptional fatigue endurance under continuous reciprocating dynamic compression operations

Original SCHNORR serrated safety washers for bolt locking

Original SCHNORR safety washers unite disc spring resilience with positive mechanical serrations. These locking elements counteract bolt loosening caused by severe vibrations, balancing joint relaxation through a dual mechanism of friction and form-fitting tooth interlock.

Dual-sided radial serrations providing positive mechanical bite into mating screw heads
Conical spring profile delivering continuous pre-load to compensate for joint relaxation
Standard type S range suited for fasteners from M1.6 to M36 in property classes up to 8.8
Reinforced type VS with increased thickness for high-strength bolts in classes 8.8 and 10.9

SCHNORR load washers manufactured according to DIN 6796

SCHNORR load washers complying with DIN 6796 and compact HS series washers maintain sustained clamping force in heavy-duty bolted assemblies. They effectively compensate for gasket creep and thermal expansion variations, preventing slackness across demanding industrial joints.

Sustained high axial tension counteracting gasket relaxation and thermal expansion shifts
Compact HS series tailored specifically for cylindrical socket head cap screws per DIN 912
Heavier cross-section thickness engineered to support elevated pre-tightening bolt forces
Widespread use across pressure piping flanges, transformer bushings, and power equipment

SCHNORR K series disc springs for bearing preload control

Specialized SCHNORR K series disc springs eliminate internal clearances within rolling element bearings. By applying sustained axial preloading, these springs dampen vibrational flutter, noticeably decrease operating noise levels, and extend operational lifespans of machinery.

Consistent axial preloading of ball and roller bearing raceways for optimum kinematics
Offered in plain continuous rings and slotted configurations for gentle load characteristics
Noticeable attenuation of high-frequency vibrational hum inside electric motor housings
Standard dimensional steps matching conventional rolling bearing outer boundary limits

High-performance alloys and engineering selection of SCHNORR

SCHNORR fabricates components from a wide selection of alloy spring steels and high-temperature grades: C67S, 51CrV4, stainless 1.4310, and Inconel. For hostile conditions, protective zinc flake, phosphate, or nickel coatings are applied to ensure exceptional corrosion protection.

High-alloy spring steels and heat-resisting nickel compositions for demanding environments
Advanced surface protections including zinc flake systems, phosphating, and passivation
Professional engineering calculation of stack configurations tailored to load criteria
Direct specification estimating verified by nameplate and drawing references with VAT 22%

SCHNORR engineering heritage and precision spring manufacturing standards

German industrial manufacturing enterprise Adolf Schnorr GmbH & Co. KG has maintained leadership across the engineering of precision disc springs and bolt locking elements since 1908.

Situated in Sindelfingen within Baden-Württemberg, the company integrates advanced metallographic research laboratories with an efficient modern manufacturing complex.

Decades of focused research and comprehensive insight into the mechanics of elastic metal deformation enable the company to develop high-performance spring systems for critical applications.

SCHNORR products operate reliably across automotive platforms, heavy equipment, railway vehicles, and energy plants, confirming consistent technical durability.

Mechanical performance of disc springs complying with DIN EN 16983

Standard SCHNORR disc springs are produced in rigorous compliance with European DIN EN 16983 specifications, which replaced the previous DIN 2093 norm.

The geometry consists of an engineered conical disc washer capable of sustaining high restoring forces within minimal axial installation height inside modern machinery.

Depending on material thickness, components are organized into three distinct groups: group 1 parts are formed by cold stamping, group 2 parts undergo precision edge turning, and group 3 parts incorporate machined contact flat surfaces.

Springs can be combined in parallel, series, or mixed layouts to deliver custom force curves.

Operating principles of original SCHNORR serrated safety washers

The Original SCHNORR Safety Washer was created as an advanced mechanical replacement for conventional split lock washers and tooth lock components.

The foundation utilizes a conical disc spring contour combined with inclined radial serrations on both faces that operate as directional mechanical locking ratchets.

During bolt tightening, the conical profile flattens elastically to generate continuous axial tension. The hardened radial serrations bite firmly into mating bolt bearing faces and joint surfaces.

This combined locking approach reliably stops loosening of threaded fasteners subjected to severe dynamic oscillations.

High-load washers per DIN 6796 and compact HS series components

SCHNORR load washers manufactured according to DIN 6796 are designed specifically for threaded joints subjected to thermal cycles and structural yield relaxation.

Manufactured with a heavy cross-section thickness, these spring elements sustain elevated pre-tightening forces across demanding engineering structures.

For socket head cap screws per DIN 912, the manufacturer engineered the specialized HS washer series.

Featuring a reduced outer diameter, HS washers fit smoothly into standard cylindrical counterbores of machinery housings, preventing joint loosening without necessitating modifications to mechanical design tolerances.

Specialized K series springs for rolling bearing preload assemblies

SCHNORR K series disc springs are engineered for precise axial preloading of rolling element bearings within electric motors, pumps, and machine tool spindles.

Unchecked internal clearance inside bearing raceways causes radial runout, elevated operating noise, and premature spalling along rolling contact surfaces.

K series springs compensate for axial play and thermal growth of shafts, delivering gentle, uninterrupted pressure on bearing rings.

The product line includes solid annular discs alongside slotted geometries, providing soft load-deflection characteristics capable of absorbing substantial axial thermal movements.

Alloy selections, surface treatments, and engineering calculation support

To secure dependable operation across hostile environments, SCHNORR works with high-grade alloys: carbon spring steels C67S and C75S, alloyed 51CrV4, austenitic stainless 1.4310, and high-temperature Inconel 718.

Every incoming raw material undergoes strict metallurgical evaluation before production begins.

Depending on environmental resistance requirements, components receive mechanical zinc plating, zinc flake protection without hydrogen embrittlement risks, phosphating, or blackening.

Qualified engineers check spring stack designs against specific installation parameters and provide detailed specifications with VAT 22%.

SCHNORR and model names are trademarks of their respective owners and are used only to identify the equipment for which we source parts. SpareX is not an official dealer, distributor or representative of SCHNORR and is not affiliated with the trademark owner. Origin, documents and warranty are stated for each item in the quotation.