B3M-BM-BMS FLEXIBLE COUPLINGS
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FLEXIBLE COUPLINGS

GENERAL DESCRIPTION With decades of experience and thousands of applications on TRANSFLUID fluid couplings the BT flexible coupling line has been expanded to include couplings for shaft-to-shaft application. The new series has been studied to provide an exceptionally robust coupling with excellent misalignment capabilities and easy installation and assembly. The B3M/BM/BMS couplings high quality flexible elements provide reliable performance while protecting the coupled machines. Manufactured with the highest quality materials in TRANSFLUID’s factory in Gallarate Italy the new B3M/BM/BMS...

GENERAL DESCRIPTION Shaft couplings Standard version for connecting two shafts. The B3M allows changing of flexible elements with no need for axial movement of either of the couplings hubs. Brake drum couplings With brake drum. See Catalogue 355 for TRANSFLUID BRAKES. Brake disc couplings With brake disc. See Catalogue 355 for TRANSFLUID BRAKES. Spacer couplings B3M with removable spacer. Combination For connection with a TRANSFLUID fluid coupling. KRD + B3M ATEX VERSIONS It is possible to get BM series couplings, with finished bores, certified as equipment for intended use in hazardous...

TECHNICAL DATA Tab. 1 Technical data for standard rubber elements Coupling size Maximum torque TKmax Dynamic torsional stiffness CTdyn *Referred to standard materials Tab. 2 - IEC electric motors Motor power at 1500 rpm Motor Size Tab. 2A - NEMA electric motors Coupling size Shaft lenght (inch) Torque (lbs-ft) Coupling size Tab. 2-2A Selection based on max allowable bore of the flexible coupling, assuming value 1 for all factors (Sm, St, Sz, SAtex). For applications where the factors are different from 1, the coupling must be properly selected according to selection procedure at page 4

COUPLING SIZE SELECTION The coupling must be selected so that the operating conditions of the coupling, do not exceed the maximum allowable load of the coupling itself. For driving machines not generating cyclic torque loads the selection of the coupling can be performed using the driving torque and the corresponding service factor. When the driving machine generates cyclic torque loads (e.g. internal combustion engines) the selection of the coupling must be checked by a torsional analysis of the complete system. Steps to be followed are as follows. 3) Known the maximum possible torque...

LOAD CLASSIFICATION AND SERVICE FACTOR Tab. 6 - Service factor for steam turbines, hydraulic or electric motors, as prime mover Agitators Pure liquids Liquids and solids Blowers Centrifugal Lobe Vane Car pullers - intermittent duty Chemical industry Agitators Centrifuges (heavy) Centrifuges (light-weight) Cooling drums Drying drums Mixers Compressors Centrifugal Lobe Reciprocating -multi-cylinder Conveyors - uniform loaded Belt Bucket Chain Screw Conveyors - Not uniformly loaded Belt Bucket Chain Reciprocating Screw Table Cranes and hoists Main hoists Trolley drive Bridge drive Slope...

B3M B3MB (with brake drum) B3MBP (with brake disk) • Metric max bore with a keyway ISO 773 - DIN 6885/1 (Inch max bore with a keyway USAS B17.1 square) •• H tolerance: +1/-0.5 mm (+0.04/-0.02 inch) ••• PD2 (1kgm2) = Wk2 (7.233 lbs-ft2) Rubber Element

BM BMB (with brake drum) BMBP (with brake disk) mm mm mm mm mm mm mm mm mm mm mm mm mm (inch) (inch) (inch) (inch) (inch) (inch) (inch) (inch) (inch) (inch) (inch) (inch) (inch) Min Max ● Min Max ● ●● Rubber Element Type • Metric max bore with a keyway ISO 773 - DIN 6885/1 (Inch max bore with a keyway USAS B17.1 square) •• H tolerance: +1 /-0.5 mm (+0.04/-0.02 inch) ••• PD2 (1kgm2) = Wk2 (7.233 lbs-ft2)

mm mm mm mm mm mm mm mm mm mm mm mm mm mm mm mm mm (inch) (inch) (inch) (inch) (inch) (inch) (inch) (inch) (inch) (inch) (inch) (inch) (inch) (inch) (inch) (inch) (inch) Min Max ● Min Max ● Rubber Element Type Weight INPUT OUTPUT PD2 PD2 ••• ••• kg 2 (lbs) (kgm ) (kgm2) • Metric max bore with a keyway ISO 773 - DIN 6885/1 (Inch max bore with a keyway USAS B17.1 square) •• H tolerance: +1 /-0.5 mm (+0.04/-0.02 inch) ••• PD2 (1kgm2) = Wk2 (7.233 lbs-ft2) Dimensions are subject to alteration without notice

Flexible couplings BM series can withstand radial, axial, angular misalignment values according to Tab. 10; such values are just approximate because the coupling compensation capability depends on applied load and rotational speed values. It is recommended anyway to perform the best possible alignment during installation. Tab. 10 Max shaft misalignment (up to 1800 rpm) Size *H nominal tolerance: + 1 /-0.5 mm (+0.04 / -0.02 inch) For operating rotational speed higher than 1800 rpm, it is recommended to reduce by 50% the max allowable misalignment. Maximum rotational speed cannot exceed the...

RUBBER ELEMENT MALE FLANGE SPACER SET SCREW (metric) Cast Iron EN-GJL-250 Cast Iron EN-GJL-250 or Steel Fe 510 Cast Iron EN-GJL-250 Steel 12.9 Cast Iron EN-GJL-250 Nodular Iron EN-GJS-400 or Steel Fe 510 SCREW (metric) LOCK WASHER SCREW (metric) LOCK WASHER BRAKE DRUM BRAKE DISC SCREW (metric) LOCK WASHER Steel 12.9 SteelSS 2343 Steel 12.9 Steel SS 2343 Cast iron EN-GJL-250 or Steel Fe 510 Steel 8.8 Steel SS 2343 Steel 8.8 C72 (elastic) or Steel hardened HRC 60±2 (cylindrical) • On request special nodular Iron EN-GJS-350-22 LT for low temperature -40°C (-40°F) •• On request special rubber...

REVERMATIC 11-700 power shift with torque converter FLUID COUPLING K series FLUID COUPLING KX series DISC AND DRUM BRAKE TFDS-NBG series PNEUMATIC CLUTCH TP series TRANSFLUID BEIJING TRADE CO. LTD Beijing Ph.: +86.10.60442301-2 tbtcinfo@transfluid.cn TRANSFLUID FRANCE s.a.r.l. 38110 Rochetoirin Ph.: +33.9.75635310 tffrance@transfluid.eu NORTH EUROPE TRANSFLUID B.V. (Bellmarine) NL-3992 AK, Houten Ph. +31 (0)85 4868530 info@bellmarine.nl TRANSFLUID UK LTD London Ph. +44.7445501066 marine@transfluid.co.uk TRANSFLUID LLC Auburn, GA 30011 Ph.: +1.770.822.1777 tfusa@transfluid.us Global web...