KTR
RADEX-NC Couplings
Engineering selection page for KTR RADEX-NC servo disc couplings - catalogue sizes, torque, speed, EK/DK dimensions and DK-configuration stiffness.
Family overview
Servo disc couplings
KTR RADEX-NC couplings are all-steel disc couplings for servo and precision drive applications. Aluminium hubs cover sizes 5 to 61; size 75 uses steel hubs in the standard catalogue range.
Configuration semantics
EK and DK configurations
- EK and DK are distinct close-coupled configurations with different overall lengths.
- Catalogue torsional stiffness values apply to DK configuration only.
- EK torsional stiffness is not stated in the available catalogue tables.
- Rated torque, bore, speed and dimensional data apply to the stated size regardless of configuration.
Selection guidance
Choosing a RADEX-NC size
- Define shaft bore, rated torque duty and maximum operating speed.
- Compare outside diameter and EK or DK length against machine envelope for the intended configuration.
- Review DK-configuration torsional stiffness only when DK layout applies to the application.
- Confirm hub material (aluminium vs steel) for size 75 and larger-duty contexts.
- Open the size PDP for catalogue dimensions before sending an engineering enquiry.
RADEX-NC size range
Select a catalogue size to review rated torque, bore, speed, EK/DK lengths and DK-configuration torsional stiffness.
RADEX-NC 5
Size
5
Rated torque
2.5 Nm rated torque
Bore
12 mm max bore
Max speed
30000 rpm max speed
Outside dia.
26 mm OD
EK length
26.5 mm EK length
DK length
34 mm DK length
Hub material
Aluminium
View RADEX-NC specifications
RADEX-NC 10
Size
10
Rated torque
15 Nm rated torque
Bore
15 mm max bore
Max speed
25000 rpm max speed
Outside dia.
35 mm OD
EK length
35 mm EK length
DK length
44 mm DK length
Hub material
Aluminium
View RADEX-NC specifications
RADEX-NC 16
Size
16
Rated torque
30 Nm rated torque
Bore
20 mm max bore
Max speed
20000 rpm max speed
Outside dia.
46 mm OD
EK length
47 mm EK length
DK length
58 mm DK length
Hub material
Aluminium
View RADEX-NC specifications
RADEX-NC 21
Size
21
Rated torque
60 Nm rated torque
Bore
30 mm max bore
Max speed
16000 rpm max speed
Outside dia.
58 mm OD
EK length
53.5 mm EK length
DK length
69 mm DK length
Hub material
Aluminium
View RADEX-NC specifications
RADEX-NC 26
Size
26
Rated torque
120 Nm rated torque
Bore
38 mm max bore
Max speed
13000 rpm max speed
Outside dia.
69 mm OD
EK length
69 mm EK length
DK length
88 mm DK length
Hub material
Aluminium
View RADEX-NC specifications
RADEX-NC 36
Size
36
Rated torque
240 Nm rated torque
Bore
45 mm max bore
Max speed
10000 rpm max speed
Outside dia.
84 mm OD
EK length
74.8 mm EK length
DK length
93.6 mm DK length
Hub material
Aluminium
View RADEX-NC specifications
RADEX-NC 43
Size
43
Rated torque
320 Nm rated torque
Bore
55 mm max bore
Max speed
8500 rpm max speed
Outside dia.
104 mm OD
EK length
89 mm EK length
DK length
115 mm DK length
Hub material
Aluminium
View RADEX-NC specifications
RADEX-NC 51
Size
51
Rated torque
470 Nm rated torque
Bore
70 mm max bore
Max speed
7500 rpm max speed
Outside dia.
124 mm OD
EK length
108 mm EK length
DK length
138 mm DK length
Hub material
Aluminium
View RADEX-NC specifications
RADEX-NC 61
Size
61
Rated torque
900 Nm rated torque
Bore
80 mm max bore
Max speed
6500 rpm max speed
Outside dia.
144 mm OD
EK length
118 mm EK length
DK length
150 mm DK length
Hub material
Aluminium
View RADEX-NC specifications
RADEX-NC 75
Size
75
Rated torque
1300 Nm rated torque
Bore
90 mm max bore
Max speed
5500 rpm max speed
Outside dia.
170 mm OD
EK length
152 mm EK length
DK length
189 mm DK length
Hub material
Steel
View RADEX-NC specifications
Request an Engineering Quote
Share shaft bore, speed, torque duty and ordering designation. Golden Bearing Company supports KTR RADEX-NC selection using catalogue engineering data. Contact us with shaft bore, speed, torque duty and configuration requirements for quotation review.