BKS
Metal Bellows Coupling with stainless steel clamping hub

15 - 500 Nm

BKS METAL BELLOWS COUPLING WITH STAINLESS STEEL CLAMPING HUB

Specifications BKS

BKS series 15 30 60 150 300 500
Rated torque (Nm)TKN 15 30 60 150 300 500
Overall length (mm)A-2 45 52 66 76 89 95
Outside diameter (mm)B49 56 66 82 110 123
Fit length (mm)C17 20 24 30 34 35
Inside diameter possible
from Ø to Ø H7(mm)
D1/D2
12-28 14-32 16-35 19-42 24-60 32-75
Inside diameter possible
from Ø to Ø H7 (inch)
D
M5
M6 M8 M10 M12 M12
Fastening screw ISO 4762E8 15 40 75 120 125
Tightening torque of
the fastening screw (Nm)
E
17.5 20 23 27 39 45
Distance between centerlines (mm)F6 7.5 9.5 11 13 13
Distance (mm)G0.1 0.2 0.53 1.5 5.5 8.1
Moment of inertia (10-3 kgm2)Jges0.27 0.42 0.78 1.5 2.9 3.5
Approximate weight (kg)CT23 31 72 141 157 290
Torsional stiffness (103 Nm/rad)CT1 1 1.5 2 2 2.5
Axial ±(mm)max.0.2 0.2 0.2 0.2 0.2 0.2
Lateral ±(mm)max.1 1 1 1 1 1
Angular ± (degree)max.30 50 67 77 112 72
Axial spring stiffness (N/mm)Ca315 366 679 960 2940 2200
Lateral spring stiffness (N/mm)Cr60,000 50,500 50,000 40,500 40,000 30,000
Speed max. with
G = 2.5 (min-1)
CAD Portal 15 30 60 150 300 500
2D/3D Data 

Properties

  • Design:
    • With a single ISO 4762 radial clamping screw per hub.
    • 
Laser welded connection between hubs and bellows.
    • Self opening clamp system optional: Loosening the clamping screw applies force to the pin, which forces the clamp into the open position for easy mounting and dismounting.
  • Temperature range: -40° C to +300° C (-40° F to +572° F)
  • Tolerance: Overall clearance between hub and shaft 0.01-0.05 mm.
  • Material:Bellows, clamping hubs, and clamping screws made from stainless steel; detailed specifications upon request.
  • Speeds: Up to 10,000 rpm;
in excess of 10,000 rpm with finely balanced version (up to G = 2.5).
  • Properties of Bellows Coupling Model BKS:
    • for high temperatures
    • compact
    • easy to mount
    • suited for space restricted installations

Overview