Golden Bearing Company
Premium industrial distribution with specification-led customer support
Manufacturer KTR
RADEX-NC
EK / DK
RADEX-NC 21
Availability
Confirm at quotation
KTR · RADEX-NC · Disc coupling · RADEX-NC 21
Rated torque
60 Nm
Max bore
30 mm
Max speed
16000 rpm
DK length
69 mm
- Manufacturer
- KTR
- Product Family
- RADEX-NC Couplings
- Series
- RADEX-NC
- Designation
- RADEX-NC 21
- Configuration
- EK / DK
KTR RADEX-NC size 21 catalogue data for engineering selection.
- Product Type
- Disc coupling
- Industry
- Industrial drives, precision automation
Why Source Through Golden Bearing Company
Authorised industrial distributor
Engineering Support
Duty review, bore selection, and application engineering assistance
Authorised Manufacturer Data
Specifications published exactly as manufacturer catalogue data
Technical Assistance
Configuration, interchangeability, and spare element guidance
Product Overview
KTR RADEX-NC 21 is a RADEX-NC all-steel disc coupling size 21 with Aluminium hubs. Rated torque is 60 Nm with EK length 53.5 mm and DK length 69 mm. Both EK and DK configurations share this catalogue size; do not interchange dimensional data between configurations.
Commercial Identification
Authoritative procurement identifiers for ERP, RFQ, and purchase order entry. Copy values directly where shown.
- Manufacturer
- KTR
- Product Family
- RADEX-NC Couplings
- Series
- RADEX-NC
- Designation
- RADEX-NC 21
- Configuration
- EK / DK
Selection Guidance
Engineering checkpoints when specifying KTR RADEX-NC 21.
Engineering Specifications
KTR catalogue values for RADEX-NC 21. Parameters not tabulated for this size are omitted rather than estimated.
Key catalogue specifications
| Designation | RADEX-NC 21 |
|---|---|
| Rated torque | 60 Nm |
| Maximum finished bore | 30 mm |
| Maximum speed | 16000 rpm |
| Hub material | Aluminium |
| Outside diameter | 58 mm |
| EK length | 53.5 mm |
| DK length | 69 mm |
| Configuration | EK; DK |
| Torsional stiffness (DK only) | 35000 Nm/rad (DK configuration) |
Dimensions
Mounting envelope dimensions from KTR catalogue tables for layout and drive integration.
Max bore
30 mm
Outside diameter
58 mm
EK length
53.5 mm
DK length
69 mm
| Maximum finished bore | 30 mm |
|---|---|
| Outside diameter | 58 mm |
| EK length | 53.5 mm |
| DK length | 69 mm |
KTR Catalogue Reference
Authoritative source for the engineering values published on this page.
Published data basis
Engineering values on this page follow KTR catalogue tables for KTR RADEX-NC 21. Additional catalogue caveats apply: Torsional stiffness tabulated for DK configuration only; EK stiffness not stated in source. Parameters not shown require KTR manufacturer catalogue verification before design sign-off.
Applications
Typical KTR RADEX-NC applications for RADEX-NC 21.
Servo disc coupling
Precision positioning
EK close-coupled
DK close-coupled
Machine tool feeds
Configuration and Arrangement
Configuration context for KTR RADEX-NC 21.
EK and DK configurations
EK length 53.5 mm and DK length 69 mm are distinct close-coupled layouts. Torsional stiffness is tabulated for DK configuration only.
Hub material
Catalogue hub material for KTR RADEX-NC 21 is Aluminium.
Frequently Asked Questions
Engineering and procurement answers for specification review and quotation.
What is KTR RADEX-NC 21?
KTR RADEX-NC 21 is a RADEX-NC all-steel disc coupling size 21 with Aluminium hubs. Rated torque is 60 Nm. EK and DK are distinct close-coupled configurations on the same catalogue size.
What is the difference between EK and DK on KTR RADEX-NC 21?
EK length is 53.5 mm and DK length is 69 mm for KTR RADEX-NC 21. Torsional stiffness values tabulated on this page apply to DK configuration only; EK stiffness is not stated in the available catalogue source.
What is the maximum bore for KTR RADEX-NC 21?
Catalogue maximum finished bore for KTR RADEX-NC 21 is 30 mm.
What is the torsional stiffness of KTR RADEX-NC 21?
Catalogue torsional stiffness for KTR RADEX-NC 21 is 35000 Nm/rad (DK configuration).
How do I request a quote for KTR RADEX-NC 21?
Send shaft bore, torque duty, speed, configuration (hub type / EK or DK layout where applicable) and application context. Golden Bearing Company supports engineering-led KTR RADEX-NC identification without publishing price or stock on this page.
Request an Engineering Quote
Share KTR RADEX-NC 21 designation, shaft bore, torque duty, speed and configuration context for engineering quotation.