LOCKING ASSEMBLIES AND SHRINK DISCS STAINLESS STEEL
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LOCKING ASSEMBLIES and SHRINK DISCS IN STAINLESS STEEL Shrink Discs Mini Series

MAV is an Italian company, world renowned for its creativity and ethics. Established in 1989, MAV has been rapidly building a reputation for its professionalism, for its reliable and comprehensive service and for its wide product range. MAV is located in Altopiano della Vi-golana, Northern Italy, at the foot of the Dolomites, one of the most beautiful areas of the Alps. Just as our products connect mechanical components in motion, our purpose is to connect our partners through their goals, feelings, wishes and emotions. Together with our partners we want to raise the standard of quality,...

Shaft -Hub c o nne c t i o ns Main cha ra c t e ri st i c s MAV 1061 MAV 1062 MAV 200 5 MAV 406 1 MAV 506 1 MAV 690 1 MAV 690 2 MAV 790 3 MAV 200 8 MAV 300 8 Installatio n a nd re m ova l i nst ruc t i o ns This catalogue contains complete information for the MAV products in stainless steel. The following pages will help you to find the perfect solution for your application. Should you require assistance with an application, please feel free to contact MAV technical support. Our engineers will be pleased to provide any information you might need. © 2018 MAV S.p.A. All rights reserved. This...

Shaft-Hub connections Traditional Methods Fig. 1: failure of keyed shaft due to fatigue crack (heat treated steel C45) Keyway and splined locking systems show important disadvantages, in particular under overload and frequent torque reversal conditions. Connected parts undergo micro movements which cause them damage. The notch of keyway seat is a stress concentrator which reduces the fatigue strength. The figures show some fatigue failures fractographs of notched shafts (courtesy of ASM International, Metals Handbook, vol 9). Keyways and splines are eliminated by forced fit systems...

Shaft-Hub connections The MAV System MAV Locking Devices meet both the advantages of forced fit systems and simplified installation-removal. The MAV system is based on the wedge principle: the axial load of the screws generates through the tapers a high radial force that locks the parts by friction. Main features of MAV Locking Devices: • shaft - locking device - hub tolerances are sufficient for easy mounting and correct positioning; • high manufacturing precision permits close geometrical tolerances, leading to a well balanced coupling, also for high speed conditions; • high pressures let...

Main characteristics Furthermore, products of other series as well as special solutions and products according to Customer’s specifications in stainless steel can be offered upon request, even in small batches. For further information or technical and commercial inquiries please feel free to visit our website www.mav.it or contact us by phone, fax, email. tel +39 0461 845151 fax +39 0461 845150 email info@mav.it

Selection MAV Locking Assemblies are internal locking devices, which provide a rigid, zero-backlash, frictional keyless connection between a shaft and hubs such as gears, pulleys, cams, levers, rotors and many others. MAV Shrink Discs are external locking devices, which provide a rigid, zero-backlash, frictional keyless connection between an outer hollow shaft (hub) and an inner shaft (application example: gearboxes with hollow output shaft). Shrink Discs are installed onto outer diameter of the outer hollow shaft, which is mounted onto inner shaft. MAV Locking Assemblies and Shrink Discs...

SHRINK DISCS Size and material of outer hollow shaft (hub) and inner shaft shall be suitable for withstanding the stress generated by the Shrink Disc, as well as by applied loads. The following inputs take into account only the contact pressures exerted by the Shrink Disc. Verification of connected parts is based on thick walled cylinder theory. • Outer hollow shaft (hub), assuming a solid inner shaft. The part shall be considered as a thick walled cylinder subject to external pressure = Ph and internal pressure = Ps. Material’s yield strength shall be greater than resulting stress. • Solid...

Safety information. Please refer to complete and updated Product and Safety Data Sheets released by Dow Corning. Information about Molykote® P-1900 paste: • service temperature range: -30 °C to +300 °C; • boiling point: n/a; • flash point: > 200 °C (method: closed cup); • can react with strong oxidizing agents; • when heated to temperatures above 150 °C in the presence of air, product can form formaldehyde vapours, hazardous to the health. Temperature influence Service temperature, related solely to the locking device, depends on mechanical properties and corrosion resistance, in the...

Locking Assemblies

Features • Transmissible torque from 36 to 7.110 Nm • Self-centering, self-locking • Single taper design • Lubrication: food grade oil FDA approved class H-1 • Tolerances: shaft h8; hub bore H8 • Shaft and hub bore surface finish 0.8 < Ra < 3.2 pm

Features Transmissible torque from 150 to 7.900 Nm Not self-centering, low self-locking Fixed axial hub position during tightening Two thrust rings with double taper design Low axial dimension Lubrication: food grade oil FDA approved class H-1 Tolerances: shaft hii; hub bore H11 Shaft and hub bore surface finish 0.8 < Ra < 3.2 pm Composition • Slotted inner ring • Slotted outer ring • Double taper front thrust ring, with integrated pull-out tapped holes • Double taper rear thrust ring • Set of socket head cap screws, grade A2-70 Listed performances are valid as long as shaft and hub are...

Features • Transmissible torque from 420 to 22.100 Nm • Self-centering, self-locking • Two thrust rings with single taper design • Lubrication: food grade oil FDA approved class H-1 • Tolerances: shaft h8; hub bore H8 • Shaft and hub bore surface finish 0.8 < Ra < 3.2 pm