d
1
C
B
d
2
D
G1
M
L±2
D
1
L d
1
d
2
B C D
1
M
mm mm mm mm mm mm mm
18 36 22 22 46 31 46 6
18 44 22 22 46 31 46 6
30 30 28 28 56 37 55 7
30 38 28 28 56 37 55 7
60 41 38 38 66 46 64 10
60 51 38 38 66 46 64 10
80 52 50 50 82 62 80 13
80 62 50 50 82 62 80 13
150 52 50 50 82 62 80 13
150 62 50 50 82 62 80 13
200 51 50 50 90 62 90 13
200 63 50 50 90 62 90 13
300 55 65 65 110 80 109 13
300 66 65 65 110 80 109 13
500 61 70 70 122 94 119 16
500 72 70 70 122 94 119 16
800 130 85 85 157 110 152 18
1400 130 85 85 157 110 152 18
3000 130 100 100 199 140 180 25
5000 143 145 145 250 190 230 25
Tech Paper
Partner for Performance
EN
08.2019
www.ringfeder.com
1
Sectional view
Metal Bellows Couplings
RINGFEDER
®
GWB CKN
Metal bellows coupling with flange
To continue see next page
Size
T n
max
C
Tdyn
ΔK
a
ΔK
w
ΔK
r
J D
G1
T
A1
Gw
Nm 1/min 10
3
Nm/rad mm mm 10
-3
kgm
2
mm Nm kg
18 22 13900 8 0,5 1,5 0,2 0,05 6 x M5 5,9 0,06
18 22 13900 6 0,5 1,5 0,2 0,05 6 x M5 5,9 0,06
30 36 11000 35 0,4 1,0 0,1 0,09 6 x M5 5,9 0,12
30 36 11000 25 0,5 1,5 0,2 0,09 6 x M5 5,9 0,12
60 75 9000 75 0,4 1,0 0,1 0,16 6 x M6 10 0,19
60 75 9000 50 0,5 1,5 0,2 0,16 6 x M6 10 0,19
80 96 7100 130 0,4 1,0 0,2 0,43 6 x M6 10 0,36
80 96 7100 75 0,5 1,5 0,2 0,43 6 x M6 10 0,36
150 180 7100 150 0,4 1,0 0,2 0,43 6 x M6 15 0,36
150 180 7100 100 0,5 1,5 0,2 0,43 6 x M6 15 0,36
200 240 6600 170 0,4 1,0 0,2 0,80 6 x M6 18 0,48
200 240 6600 120 0,5 1,5 0,2 0,80 6 x M6 18 0,48
300 360 5200 500 0,4 1,0 0,2 1,70 6 x M8 25 0,59
300 360 5200 280 0,5 1,5 0,2 1,70 6 x M8 25 0,59
500 600 4600 680 0,5 1,0 0,2 2,30 6 x M8 36 0,88
500 600 4600 310 1,0 1,5 0,2 2,30 6 x M8 36 0,88
800 960 3700 760 1,0 1,5 0,2 11,00 6 x M16 210 3,74
1400 1680 3700 1300 1,0 1,5 0,2 11,00 6 x M16 210 3,73
3000 3000 3700 2800 1,0 1,5 0,2 47,00 6 x M20 365 7,80
5000 5000 3000 4800 1,0 1,5 0,2 119,00 8 x M20 365 11,74
Tech Paper
Partner for Performance
EN
08.2019
www.ringfeder.com
2
Disclaimer of liability
All technical details and notes are non-binding and cannot be used as a basis for legal claims. The user is obligated
to determine whether the represented products meet his requirements. We reserve the right carry out modifications
at any time in the interests of technical progress.
Metal Bellows Couplings RINGFEDER
®
GWB CKN
L = Total length
d
1
= Inner diameter
d
2
= Inner diameter
B = Bellow outer diameter
C = Pitch circle diameter
D
1
= Outer diameter
M = Max. depth of thread
T = Transmissible torque at given T
A
n
max
= Max. rotation speed
C
Tdyn
= Dynamic torsional stiffness
C
r
= Radial spring stiffness
C
a
= Axial spring stiffness
ΔK
a
= Max. permissible axial misalignment
ΔK
w
= Max. permissible angular misalignment
ΔK
r
= Max. permissible radial misalignment
J = Total moment of inertia
n
Sc1
= Quantity of screws D
G1
D
G1
= Thread
T
A1
= Tightened torque of clamping screw D
G1
Gw = Weight
Series/Size Length Further details
CKN 150 52 *
Further information on
RINGFEDER
®
GWB CKN
on www.ringfeder.com
Explanation
Ordering example
degree
Size
* Stainless steel