Mechanical clamping sets – The force-fit connection for the most demanding requirements

Mechanical clamping sets are high-precision machine elements used for the backlash-free connection of shafts and hubs. They enable reliable torque transmission without keyways or splined shafts, ideal for modern drive solutions.

Catalogue - mechanical clamping elements

Operating principle

Clamping sets consist of conical inner and outer rings that are moved against each other by tightening screws. This movement generates radial pressure, which creates a friction-locked connection between the shaft and hub – completely without play.

Instruction manual SEL clamping elements

Advantages at a glance

  • Cost-efficient - especially for one-time or infrequent assembly operations
  • Ideal for fixed, permanent connections
  • Absorption of high radial forces
  • Suitable for high temperature ranges 
  • Can also be used with grooved shafts

Typical areas of application

  • Drive technology (e.g., motors, gearboxes)
  • Conveyor systems
  • Packaging and production machines
  • Machine tools

You can find the relevant CAD data on our SELENA Engineering Platform. We are happy to assist you with any customer-specific requirements. Simply contact our technicians at engineering@lenze-selection.com.

Mechanical clamping sets – self-centering

SEL1100

  • Medium to high transmissible torques (11 – 25.257 Nm)
  • Available for shaft diameters of 6 to 130 mm
  • Self-centering
  • Low surface pressure
  • Suitable for hubs with low yield strength
  • No axial displacement when tightening the screws
  • Compact dimensions

SEL4000

  • High transmissible torques (3.490 – 864.290 Nm)
  • Available on request for shaft diameters of 45 to 600 mm
  • Self-Centering
  • No axial displacement during assembly
  • Good concentricity and perpendicularity

SEL4500 / SEL4520

  • Very high transmissible torques (849 – 931.746 Nm)
  • Available for shaft diameters of 25 to 400 mm 
  • Self-centering
  • Even pressure distribution
  • No axial displacement when tightening screws
  • Removal via extraction threads
  • Excellent perpendicularity

SEL1300

  • High transmissible torques (492 – 95.058 Nm)
  • Available for shaft diameters of 18 to 200 mm 
  • Self-centering
  • Even pressure distribution
  • Axial displacement when tightening screws
  • Excellent shaft-to-hub perpendicularity
  • Quick installation and removal

SEL1310

  • Medium to high transmissible torques (307 – 51.399 Nm)
  • Available for shaft diameters of 18 to 200 mm
  • Self-centering 
  • Low surface pressure
  • Quick installation and removal
  • No axial displacement when tightening the screws
  • Excellent shaft-to-hub perpendicularity

SEL1320

  • Hight transmissible torques (331 – 64.796 Nm)
  • Available for shaft diameters of 18 to 200 mm
  • Self-centering 
  • Axial displacement when tightening screws
  • Optimal shaft-to-hub perpendicularity
  • Quick installation and removal
  • Reduced axial dimensions

SEL1330

  • Medium to high transmissible torques (252 – 49.305 Nm)
  • Available for shaft diameters of 14 to 50 mm
  • Self-centering
  • No axial displacement when tightening the screws
  • Excellent concentricity and perpendicularity 

SEL1340

  • Medium to high transmissible torques (221 – 1.838 Nm)
  • Available for shaft diameters of 14 to 50 mm
  • Self-centering
  • Low surface pressures
  • Quick installation and removal
  • No axial displacement when tightening the screws
  • Excellent concentricity and perpendicularity

SEL1390

  • Medium to high transmissible torques (8 – 2.260 Nm)
  • Available for shaft diameters of 5 to 50 mm
  • Self-centering
  • Quick installation and removal
  • Slight axial displacement when tightening screws
  • Excellent shaft-to-hub concentricity and perpendicularity
  • During assembly, it generates an axial force that can be used to axially clamp bearings or other components adjacent to the hub

SEL1110

  • Medium to high transmissible torques (108 – 2.143 Nm)
  • Available for shaft diameters of 14 to 65 mm
  • Self-centering
  • Effective alternative to SEL3000: no flange or spacer required
  • Quick installation and removal
  • Tolerance h8 for shaft, H8 for hub
  • Axial displacement during assembly
  • Bolts NOT included as their length, being related to end-use, can’t be set in advance

SEL1321

  • High transmissible torque (280 – 4.607 Nm)
  • Available for shaft diameters of 20 to 70 mm 
  • Self-centering
  • Axial displacement when tightening screws
  • Optimal shaft-to-hub perpendicularity
  • Reduced axial dimensions
  • Quick installation and removal

SEL2500 L

  • Medium to high transmissible torques (66 – 1.398 Nm)
  • Available for shaft diameters of 14 to 70 mm
  • Self-centering 
  • Axial displacement when tightening the locking nut
  • Good perpendicularity 

Mechanical clamping sets – not self-centering

SEL2000

  • Very high transmissible torques (315 – 1.278.800 Nm)
  • Available for shaft diameters of 17 to 600 mm
  • Easy removal
  • Possible use on shaft-hubs with large tolerances (h11/H11)

SEL2500

  • Medium to high transmissible torques (45 – 1.475 Nm)
  • Available for shaft diameters of 14 to 70 mm
  • Not self-centering
  • Easy installation and removal 
  • Axial displacement when tightening the locking nut

SEL3000

  • Medium to low transmissible torques (3 – 51.000 Nm)
  • Available for shaft diameters of 6 to 240 mm
  • Not self-centering 
  • No axial displacement during assembly 
  • Requires threads in the hub
  • Requires a thrust flange
  • Quick installation and removal
  • No axial displacement during assembly 

SEL5000

  • Medium to high transmissible torques (173 – 5.411 Nm)
  • Available for shaft diameters of 17 to 80 mm
  • Perfect axial alignment
  • No backlash
  • Quick installation
  • Tolerance h8 for shaft, H8 for hub

Customized versions available on request (not self-centering)

SEL4510

  • Medium to high transmissible torques (values without bending moment: 7.300 – 866.000 Nm; values with maximum bending moment: 5.271 – 747.654 Nm)
  • Available on request for shaft diameters of 70 to 600 mm
  • For applications with high bending moments
  • Quick installation and removal
  • No axial displacement when tightening the screws
  • Excellent concentricity and perpendicularity

SEL3500 special

  • Medium to high transmissible torques (8 – 2.260 Nm)
  • Available on request for shaft diameters of 5 to 50 mm
  • Excellent concentricity and perpendicularity
  • No axial displacement during assembly
  • Low surface pressures
  • Reduced axial dimensions
  • Easy to remove

Shrink discs

SEL6010, SEL6020, SEL6030, SEL6030 12.9

  • High torques
  • Available for shaft diameters of 14 to 1000 mm
  • Easy installation & removal
  • Four available versions:
    SEL6030 (Mt: 32 - 1.310.000 Nm), standard series (recommended)
    SEL6030 12.9 (Mt:  245 – 1.580.000 Nm), SEL6030 with 12.9 screws
    SEL6020 (Mt: 15.000 – 1.500.000 Nm), heavy duty series
    SEL6010 (Mt: 10.550 – 935.000 Nm), lightweight series

SEL6210, SEL6220, SEL6230, SEL6810, SEL6830

  • Very high torques
  • Available for shaft diameters of 12 to 1000 mm
  • Quick installation and removal
  • Five available versions:
    SEL6220 (Mt: 20 – 3.912.000 Nm), standard series (recommended)
    SEL6810 (Mt: 1.500 – 4.727.000 Nm), SIT-Lock 1422 with 12.9 screws
    SEL6230 (Mt: 26.000 – 3.272.000 Nm), heavy duty series
    SEL6830 (Mt: 30.000 – 3.956.000 Nm), SIT-Lock 1423 with 12.9 screws
    SEL6210 (Mt: 16.000 – 4.033.000 Nm), lightweight series

Single screw clamping element

SEL300 & SEL400

The SEL300/SEL400 consists of a single cylindrical ring with a tapered hole cut into it. A special screw with a tapered surface is inserted into the tapered hole. Tightening the screw exerts pressure on the shaft and hub. This pressure enables the transmission of torque. 

Features:

  • Quick and easy assembly and disassembly
  • No axial displacement between hub and shaft when tightening the screws
  • Economical
  • Compact dimensions
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