Metal Bellows Couplings BK

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Bellows Coupling Model BK4 for Fanuc-drives

Series from 15 - 150 Nm

Bellows Coupling BK 4 for Fanuc Drives

Data table and downloads bellows coupling BK4 series 15 - 150 Nm

Model BK4

Series

15

30

60

150

Rated torque (Nm) TKN153060150
Overall length (mm) A47 5468 7672 8282 94
Outer diameter of bellow (mm) B49556681
Fit length (mm) C19222732
Inner diameter possible from Ø to Ø H7 (mm) D10-2212-2312-2915-37
6 x Fastening screws ISO 4017 EM4M5M5M6
Tighting torque of the fastening screws (Nm) E46812
3 x draw-off screw ISO 4017 FM4M4M5M5
Shaft diameter (mm) G20273030
Shaft length (mm) H8.5221820
Mass moment of inertia (10-3 kgm2) Jges0.10 0.120.22 0.270.58 0.611.1 1.4
approx. weight (kg) 0.250.40.81.35
Torsional stiffness (103 Nm/rad) CT20 1539 2876 55175 110
Axial (mm) max.1 21 21.5 22 3
Lateral (mm) max.0.15 0.20.2 0.250.2 0.250.2 0.25
Axial spring stiffness (N/mm) Ca25 1550 3072 4882 52
lateral spring stiffness (N/mm) Cr475 137900 2701200 4201500 435
Cone Ø (Fanuc-Motor) (mm) I11161616
Keyway wide (mm) K4555
Downloads
Short Version

15

30

60

150
2D-DXF (ZIP folder)
3D-EXE (Viewer)
3D-STEP (ZIP folder)
Downloads
Long Version
15 30 60 150
2D-DXF (ZIP folder)
3D-EXE (Viewer)
3D-STEP (ZIP folder)

(1 Nm = 8.85 in lbs)           max. angular misalignment see Bellow Coupling BK1 
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