Nickel bellows couplings with screw hubs in 3 sizes

The BKNS nickel bellows coupling family consists of versions with stress-free nickel bellows for applications where high precision is required. They enable backlash-free and angularly accurate transmission of rotary movements and optimally compensate for misalignment. The designation numbers provide information about the installation dimensions: the diameter of 12, 17 or 25 mm is shown at the front. The installation lengths behind are 23, 30 or 33 mm and can therefore be optimally customised to your application. Their technical data depends on the size, but the nickel bellows couplings from abp all have very high torsional stiffness combined with low restoring forces. These properties are ideal for measuring tasks. The BKNS 1223 variant is also characterised by stainless steel hubs.

Compare this with our variants with clamping hubs: BKNK 1733/2537.

Technical data- Nickel bellows coupling BKNS

Technical data		BKNS 1223	BKNS 1730	BKNS 2533
max. speed	min-¹	10.000	10.000	10.000
max. torque	Ncm	13	39	328
max. offset of shafts
radial	mm	± 0,54	± 0,72	± 0,46
axial	mm	± 2,29	± 3,09	± 2,77
angular	Grad	± 15	± 14	± 8
torsion spring stiffness	Nm/rad	28	80	462
radial spring stiffness	N/mm	4,2	3,0	38,1
moment of intertia	gcm²	1,85	3,81	1,61
max. clamping torque	Ncm	79	132	132
temperature range	°C	-30/ +120	-30/ +120	-30/ +120
weight appr.	g	10	10	19,5
material flange		stainless steel	aluminium anodised	aluminium anodised
material bellows	nickel