Bellows couplings BKXS 1520/1522/1525: 15mm diameter & 20-25mm length

The BKXS family of bellows couplings are the smallest versions with stainless steel bellows and aluminium hubs (and fastening with grub screw) in our range. The designation numbers provide information about the installation dimensions: the diameter of 15 mm is at the front, the overall lengths are 20, 22 or 25 mm. Their technical data varies slightly. The numerous application examples can be found under the heading bellows couplings. These couplings are backlash free and have an optimum compensation of misalignments, a very high torsion spring stiffness and low restoring forces.
Compare our variants with reinforced stainless steel bellows (BKXSV) and the larger versions with correspondingly adapted performance values: BKXS 1924/1929, BKXS 2029/2035 and BKXS 2526/2531.

Technical data - bellows coupling BKXS

Technical data		BKXS 1520	BKXS 1522	BKXS 1525
max. speed	min-¹	10.000	10.000	10.000
max. torque	Ncm	40	40	40
max. offset of shafts
radial	mm	± 0,20	± 0,25	± 0,30
axial	mm	± 0,40	± 0,45	± 0,50
angular	Grad	± 3	± 4	± 4
torsional spring stiffness	Nm/rad	90	85	70
radial spring stiffness	N/mm	40	20	15
moment of inertia	gcm²	2	2,1	2,3
max. clamping torque	Ncm	70	70	70
temperature range	°C	-40/ +140	-40/ +140	-40/ +140
weight appr.	g	6	6,5	7
material flange	aluminium	anodised
material bellows	stainless	steel