Metal Bellows Coupling I Series KXL

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• for high torques up to 65.000 Nm • backlash-free, exact torque transfer • high torsional stiffness • low moments of inertia • high tolerance of shaft misalignments • three-part construction • easy to fit • variable in use

The metal bellows couplings of the series KXL are constructed for medium size to big drives of up to 65.000 Nm. Although this type of coupling has proven itself reliable for years, the series was completely redesigned in order to make it even more attractive regarding technical parameters as well as the aspect of costs. It is very special because of the three-part construction with a flexible intermediate piece (bellows). This intermediate piece can be disassembled. It consists of an optimal torsionally stiff stainless steel bellows with 2 bellows shafts on each side and an intermediate pipe which is variable in length. The connection with the two hubs is frictionally engaged (screws acc. to ISO 4017/10.9). Therefore, assembly is much easier, as in case of inspection or service, the heavy drive unit or the output unit need not be disassembled. The designer can choose between several hub variations (see selection table). The very good moment of inertia and the rotation symmetrical design ensure good dynamic operation characteristics. KXL couplings are most suitable for precise drives, such as those used in printing machines, cross cutters, main spindle drives, transfer axes or used in combination with gearboxes. Medium transport or a parallel drive chain through the coupling interior is possible.

 

material:
bellows: stainless steel
flange: heat-treated steel – burnished
hubs: heat-treated steel – burnished

hub type A:
frictional, backlash-free conical clamping ring connection, external free lateral disassembly of the bellow part. The elongation of total length “L4” of the intermediate pice of 4 mm at mounting is already taken into consideration (see mounting picture)

hub type B:
frictional, backlash-free conical clamping ring connection, internal free lateral disassembly of the bellows part is NOT possible

hub type F/G:
attached flange acc. to ISO 9409 or customer requirements – center outside or inside. Dimensions of flange hub types F and G of L13, L19 and D6, D9, D10, D11, D12 customized

hub type A/B:
frictional, backlash-free conical clamping ring connection – external – internal – free lateral disassembly of the bellows part is NOT possible

technical data:

KXL
Size
torques
nominal
torque
TN [Nm]
torques
maximum
torque
Tmax [Nm]
torsional
stiffness
[Nm/arcmin]
spring rate
axial
Ca[N/mm]
spring rate
angular
Cw[N/°]
max. shaft misalignment
axial ±
da[mm]
max. shaft misalignment
angular
dw[°]
max. shaft misalignment
lateral
dr[mm]
44.0006.0006104803531,41,2
6,56.5009.00010005505531,31,4
99.00013.0001.70065011531,31,5
1212.00017.0002.200490853,51,42,0
1818.00025.0003.2005001253,51,32,3
2828.00038.0005.70046018041,22,3
5050.00065.00011.00057022541,22,5

maximum temperature range: -40°C up to +300°C

KXL
Size
mass
per hub
A/B
mA/mB
[kg]
mass
per hub
F/G
mF/mG
[kg]
mass
bellows
mBP
[kg]
moments of inertia
per hub
A/B
JA/JB
[kgm²]
moments of inertia
per hub
F/G
JF/FG
[kgm²]
moments of inertia
bellows
JBP
[kgm²]
4835,70,040,020,04
6,51258,00,070,040,08
9166,510,50,120,070,14
12218140,170,080,24
183111200,370,180,47
285220300,940,531,12
509530452,51,42,65

note: The technical data corresponds to bellows with standard length ‘L16’ or ‘LA’. Different lengths are available on request

Dimensions [mm]: length dimensions according to DIN ISO 2768 cH

Size46,5912182850
D1 min
D2 max
70
90
75
100
80
108
90
130
110
150
130
170
150
220
D3157168190205247296380
D5167198256273322406505
D7203236259319372460561
D8152183193208250325416
L16270778591105120
L253,560,566747993108
L346505462667888
L4**286321351399442497537
L5-202323252730
L6-7,58,81011,512,512,5
L7-4348,855626872,5
L8-3848,844555566,5
L9-68758389103118
L10**-217239271306337357
L12**-267293333372415447
L16*41505980100110120
LA±2158177193225256283297
L1821242525303034
L20**164188200232266288304
L2121242525303034
f12 x
M10
12 x
M12
12 x
M14
14 x
M16
12 x
M18
12 x
M20
16 x
M20
i10 x
M10
9 x
M12
8 x
M14
9 x
M14
8 x
M16
10 x
M16
12 x
M18
DT***4 x
M10
3 x
M14
4 x
M16
3 x
M20x1,5
4 x
M20x1,5
4 x
M20x1,5
6 x
M20x1,5
TA-f [Nm]
TA-i [Nm]
65
65
115
115
180
180
250
180
350
250
500
250
500
350

*standard length – intermediate part
**overall length for standard length L16
***draw-off thread

order example:
KXL 6,5 – AA / L4 = 318 / D1 = 80 H7 / D2 = 90 H7
KXL 13,5 – BG / L16 = 200 / D1 = 120 G6 / D2 = customer specific