MAV - SD and rigid couplings
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Locking Assemblies Calettatori Discs Couplings Mini Shrink Serie Mini

company 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 Bosentino, Northern Italy, at the foot of the Dolomites, one of the most beautiful areas of the Alps. mission 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 connections - Traditional method Shaft-Hub connections - The MAV system MAV Shrink Discs: main characteristics MAV Rigid Couplings: main characteristics General information Applications MAV 2008 - MAV 2108 - MAV 2208 MAV 3008 - MAV 3009 - MAV 3108 - MAV 3208 - MAV 3209 Applications MAV 1004 MAV 1204 MAV FC 2008 MAV SC 2008 - MAV SC 2208 Shrink Discs - Installation and Removal Instruction Rigid Shaft Couplings - Installation and Removal Instruction Technical Support This catalogue contains complete information for the MAV Shrink Discs and Rigid Couplings Standard Series. The...

Shaft-Hub Connections Traditional Methods Fig. 1: shaft failure 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 gures show some fatigue failures fractographs of notched shafts (courtesy of ASM International, Metals Handbook, vol 9). Fig. 2: fatigue problem caused by torsion Fig. 3: typical fatigue fracture...

Shaft-Hub Connections The MAV System MAV Locking Devices meet both the advantages of forced t systems and simplied installation-removal. It 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 sufcient 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 high torque to be...

MAV Shrink Discs Main Characteristics bending capacity also available in SPLIT and HALF HC & HT designs. torque capacity MAV has more than 20 years of experience in the power transmission eld. These years have been characterized by a deep collaboration with Customers. Thanks to this enrichment, our technical department can now provide innovative and alternative solutions for the various problems and applications. Another instrument that leads to an improvement of the performances of MAV’s products is the FEM analysis, with verications that allow increase in safety and strength. Checking the...

MAV Rigid Shaft Couplings Main Characteristics torque capacity bending capacity SHRINK DISCS - RIGID COUPLINGS

Selection MAV shrink discs are external locking devices, which provide a rigid, zero-backlash frictional connection between hollow shaft (hub) and shaft (example: hollow shaft gearboxes). Shrink discs are installed on the hub, which is mounted on the connected shaft. MAV rigid shaft couplings are external locking devices, which provide a rigid, zero-backlash frictional connection between two shafts. Shrink discs and rigid shaft couplings are well suited to transmit torque, thrust loads and bending moments, separately or simultaneously. The locking devices act as interference ts, but the...

Shaft and hollow shaft (hub) verication Size and material of shaft and hollow shaft (hub) must be selected in order to resist the stress generated by the locking device and by the applied loads. The following criteria are valid by considering only the contact pressures exerted by the locking device. The verication of connected components is based on thick walled cylinder theory. • • • External hollow shaft (hub) - shrink disc connection. The hub must be considered as a thick walled cylinder, subject to external pressure Ph and internal pressure Ps. Solid shaft – shrink disc or rigid shaft...

SHRINK DISCS - RIGID COUPLINGS

SHRINK DISCS - RIGID COUPLINGS

Standard Series Slotted inner ring Front outer ring Rear outer ring Set of hexagonal head cap screws, grade 10.9 (size < M6 of grade 8.8) • External locking device for hollow shaft (hub) shaft connection • Three-part design • Self-releasing tapers, greased with MoS2 (μ = 0.05) • Screws greased with MoS2 (μ = 0.10) • Zinc plated outer rings • O-Ring between outer rings from size d = 140 mm and above • MAV 2008: standard series, medium capacity • MAV 2108: light series, low capacity • MAV 2208: heavy series, high capacity • SPLIT and HALF HC and HT versions also available (for HALF versions,...

Standard Series SHRINK DISCS - RIGID COUPLINGS

Standard Serie SHRINK DISC RIGID COUPLINGS

Ma: screws tightening torque Ps: contact pressure on shaft Mt: transmissible torque with Fax=0 kN Ph: contact pressure on hub outer diameter Fax: transmissible axial load with Mt=0 Nm 16 SHRINK DISCS - RIGID COUPLINGS

Ma: screws tightening torque Mt: transmissible torque with Fax=0 kN Fax: transmissible axial load with Mt=0 Nm Ps: contact pressure on shaft Ph: contact pressure on hub outer diameter SHRINK DISCS - RIGID COUPLINGS

SHRINK DISCS - RIGID COUPLINGS

Standard Series Slotted inner ring, with integrated push-off threads Outer ring Set of hexagonal head cap screws, grade 10.9 (size < M6 of grade 8.8) for series MAV 3008 MAV 3108 - MAV 3208; grade 12.9 for series MAV 3009 - MAV 3209 Hardened washers DIN 6916 for units with screw size ≥ M16 External locking device for hollow shaft (hub) shaft connection Two-part design Self-releasing tapers, greased with MoS2 (μ = 0.05). Series MAV 3008 – MAV 3009 feature oiled tapers (self-locking) up to size 68x115 Screws greased with MoS2 (μ = 0.10) MAV 3008 – MAV 3009: standard series, medium capacity...