Concentrated energyTM

CONTENTS INTRODUCTION Always striving to innovate • High-tech expertise • An extensive range of spring washers INSPECTION AND SHIPPING A fully equipped inspection laboratory • The importance of packaging 25 BELLEVILLE WASHERS Custom analyses and top-end manufacturing • Static, dynamic, high temperature or cryogenic operation DESIGN AND ENGINEERING From analysis of your requirements... to custom production... • The experience and expertise of an in-house engineering department WAVED SPRING WASHERS From ball bearing pre-stress to custom applications • Use a minimal volume to store and restitute...

Borrelly has specialised in designing and producing spring washers since the early 1970s. Dominique Borrelly took the reins of the company in 1990 and has continued its growth through a policy of continual innovation. Numerous investments in human and technical resources ensure that the company’s products are at the leading edge of technology. national and international development, and has set up appropriate facilities to attain its objectives: • Several functional production units suited to innovative manufacturing techniques. • An inspection laboratory equipped with optical, static and dynamic...

FROM ANALYSIS OF YOUR REQUIREMENTS... esigning a spring washer requires thorough knowledge of the product, acquired through years of experience. Our in-house engineering department builds on this experience through its familiarity with high-performance computational software. In terms of energy stored per unit volume of material, spring washers are among the most efficient types of spring. We work with you to consider your needs and draw up requirement specifications in order to determine the most technically and economically suitable solution. works with you to determine the spring washer that...

The first phase in designing a spring washer entails determining the material that best meets the stipulated requirement specifications. Other grades: 11 R 51 (Sandvik patent), Hastelloy, Monel, Phosphor bronze, Titanium, Waspaloy, Composite materials. Spring washers, like wound wire springs such as coil springs, are round elastic parts. Unlike coil springs which are “tall” compared with their diameter, spring washers are “short” compared with their diameter. Spring washers are therefore used when a “round elastic part” is needed in an assembly and there is space available for its diameter but...

This table is not intended to be exhaustive. It lists the materials regularly used which have a favourable ratio of elastic limit to longitudinal modulus of elasticity for relatively high elastic deformations. ©Borrelly™ - Not legally binding, data provided for information only and subject to change In a standard helical spring, the material is only compressed in torsion, which implies that force is always proportional to displacement (except if complex methods such as non-cylindrical windings, varied winding spacing or variable diameter wire are used). The same does not apply to spring washers...

rom dimensional inspection and appearance tests to materials resistance and static or dynamic loading tests, our laboratory is fully equipped to check that all products we supply comply with their specifications. In accordance with ISO 9001:2000 and EN 9100 procedures, all our inspection equipment is traceable to national metrological standards and is regularly calibrated. Total traceability is guaranteed and records can be archived indefinitely. Batch numbers are linked to full manufacturing details: materials, all production phases, intermediate inspections, final inspection and shipping. hipping...

WAVED spring washers

WAVED SPRING WASHERS GENERAL: BALL BEARING NOISE Non pre-stressed ball bearing Pre-stressed ball bearing Internal clearance in ball bearings is essential but generates noise and vibrations. Using spring washers to take up internal clearance reduces vibrations considerably and also decreases bearing noise. This has a beneficial effect on bearing service life. Examples of bearing applications Electric motor Tighter clearance, controlled force

• Problem to be solved: Handle pre-stress in a high speed turbine. • Constraints: Cryogenic operating temperatures, particularly small overall dimensions, very tight load tolerance, zero hysteresis. • Solution: Beryllium copper waved spring washers. • Borrelly added value: Characterisation of the design parameters and parameters for manufacturing at 20°C, to achieve a result that fully met the customer’s requirements at 50 K, right from the first prototype. Civil aeronautics • Problem to be solved: Guarantee locking of a multi-pin connector ring. • Constraints: Very small overall dimensions,...

Available from stock Borrelly references* ©Borrelly™ - Not legally binding, data provided for information only and subject to change * For a stainless steel washer, replace the characters “XT” by “IX” at the end of a reference. Borrelly SPRING WASHERS#

Available from stock Borrelly references* ©Borrelly™ - Not legally binding, data provided for information only and subject to change * For a stainless steel washer, replace the characters “XT” by “IX” at the end of a reference. Borrelly SPRING WASHERS#

OE SPECIAL WAVED SPRING WASHERS WITH EXISTING TOOLS These tables are not restrictive. They are provided to avoid unnecessary expensive tooling costs. Unlike our standard range, we do not keep these washers in stock. They can however be manufactured on request with very short lead times. The values in the tables are not binding. Data is provided for information only and subject to change without notice. Approx. free height (mm) Ho * Other materials on request. Approx. stiffness (daN/mm) Approx. flat force (daN) ©BorrellyTM - Not legally binding, data provided for information only and subject to...