Torsion Stiff Metal Bellow Couplings

ALMA metal bellow couplings connect shafts absolutely torsion stiff, by balancing their misalignment in lateral, angular and axial direction. In circumferential direction they operate like a rigid element, this way they can transfer drag torques absolutely torsion stiff.

High stability of welding connection
ALMA couplings of ATM and AEKN types are generally welded together at clamping hubs and metal bellow. Therefore the connection has a high resistance against acids or other aggressive media.

Corrosion-free stainless steel version
ALMA couplings made of stainless steel are corrosion-free and therefore ideal for operating conditions with aggressive media and vacuum or clean room applications. Because of their high operating temperature rating of up to 300 °C they are ideal for high demands in chemical, food and vacuum applications.

Miniature Metal Bellow Couplings

The miniature couplings type AMK and AMKN balance misalignments of rotating shafts and ensure an absolute synchronized transfer of rotating movements. They feature a low angular momentum and high torsion stiffness. They are applicable for nominal torques of 0,25 Nm - 12 Nm for shaft diameters of 1 mm - 24 mm.

Benefits at a Glance

• Low angular momentum
• Balancing of misalignments
• Temperature range up to 80°C
• Compact Design
• Free of wear and play
• Easy Mounting and Demounting

Torsion stiff Metal Bellow Couplings

ALMA Metal Bellow Couplings type ATM feature a welded bonding. This ensures higher temperature resistance and higher mechanical strength. Clamping types are conical clamp connections, radial or axial clamping hubs, etc. ALMA Metal Bellow Couplings are applicable for nominal torques of 10 Nm - 320 Nm for shaft diameters of 8 mm - 60 mm.

Benefits at a Glance

• Low angular momentum
• High torsion stiffness
• Balancing of misalignments
• Temperature range up to 300°C
• Variable clamping possibilities
• Torque transfer exact and free of play
• Easy Mounting and Demounting

Torsion Stiff Metal Bellow Couplings Product Overview

	Type	Benefits	Clamping, connection hub-bellow	Material	Transferable torques and deliverable sizes
	AMK	Miniature type for low torques	Radial threaded pin, adhesive bonding	Hubs: AlMgSi1 Bellows: CuZn20	0,25-12,0 Nm D1/D2 1-24 mm
	AMKN	Miniature type for low torques	Radial clamping hubs, adhesive bonding	Hubs:AlMgSi1, Bellows: CuZn20	0,4-12,0 Nm D1/D2 3-20 mm
	AEKN	Miniature type for applications in vacuum or aggressive media	Radial clamping hubs, weldment	Hubs: 1.4305, Bellows: 1.4571	1,8-10,0 Nm D1/D2 3-14 mm
	ATMK	For applications in vacuum or aggressive media, for high torques	Hubs: radial weldment	Hubs: 1.4305, Bellows: 1.4571	10,0-320,0 Nm D1/D2 8-60 mm
	ATMN	For high torques and axial clamping	Conical clamp connection, axial clamping, weldment	Hubs: 1.4305, Bellows: 1.4571, Socket: 42CrMoS4	10,0-320,0 Nm D1/D2 8-41 mm
	ATMF	For applications in vacuum or aggressive media, for high torques and axial clamping	Axial clamping, fitting flange	Hubs: 1.4305, Bellows: 1.4571	10,0 - 320,0 Nm D1/D2 25-50 mm
	ATMB	For applications in vacuum or aggressive media, for high torques	Radial clamping, Fit-in-key	Hubs: 1.4305, Bellows: 1.4571	20,0 - 320,0 Nm D1/D2 10-42 mm
	AKS	Rigid type	Radial clamping, threaded pin	AlCuMgPb	D1/D2 2-12 mm