EK7
Elastomer Coupling with expanding shaft

2 - 2,150 Nm

EK7 ELASTOMER COUPLING WITH EXPANDING SHAFT

EK7

Specifications EK7

EK7 Series
Type (Elastomer insert)
Rated torque (Nm)TKN
Inside diameter possible from Ø to Ø H7 (mm)D1
Outside diameter (mm)B
Outside diameter with screw head (mm)BS
Moment of inertia D1 (10-3 kgm2)J1
Moment of inertia D2 (10-3 kgm2)J2
Approximate weight (kg)
Fastening screw ISO 4762E1
Fastening screw ISO 4762E2
Distance between centerlines (mm)F
Distance (mm)G
Speed standard (min -1)
Mounting length (mm)C1
Fit length (mm)C2
Outside diameter range h7 (mm)D2
Maximum torque* (Nm)TKmax
Overall length (mm)A
Inside diameter of elastomer (mm)DE
Tightening torqueE1
Tightening torque (Nm)E2
Length (mm)H
CAD Portal
EK7 Serien5
Type (Elastomer insert)A|B|C
Rated torque (Nm)TKN9|12|2
Inside diameter possible from Ø to Ø H7 (mm)
D14-12,7
Outside diameter (mm)B25
Outside diameter with screw head (mm)BS25
Moment of inertia D1 (10-3 kgm2)J10,002
Moment of inertia D2 (10-3 kgm2)J20,002
Approximate weight (kg)0,04
Fastening screw ISO 4762E1M3
Fastening screw ISO 4762E2M4
Distance between centerlines (mm)F8
Distance (mm)G4
Speed standard (min -1)15000
Mounting length (mm)C18
Fit length (mm)C212
Outside diameter range h7 (mm)D210-16
Maximum torque* (Nm)TKmax18|24|4
Overall length (mm)A22
Inside diameter of elastomer (mm)DE10,2
Tightening torqueE12
Tightening torque (Nm)E24
Length (mm)H7
5
CAD
EK7 Series
Type (Elastomer insert)
Rated torque (Nm)TKN
Inside diameter possible from Ø to Ø H7 (mm)D1
Outside diameter (mm)B
Outside diameter with screw head (mm)BS
Moment of inertia D1 (10-3 kgm2)J1
Moment of inertia D2 (10-3 kgm2)J2
Approximate weight (kg)
Fastening screw ISO 4762E1
Fastening screw ISO 4762E2
Distance between centerlines (mm)F
Distance (mm)G
Speed standard (min -1)
Mounting length (mm)C1
Fit length (mm)C2
Outside diameter range h7 (mm)D2
Maximum torque* (Nm)TKmax
Overall length (mm)A
Inside diameter of elastomer (mm)DE
Tightening torqueE1
Tightening torque (Nm)E2
Length (mm)H
CAD Portal
EK7 Serien10
Type (Elastomer insert)A|B|C
Rated torque (Nm)TKN12,5|16|4
Inside diameter possible from Ø to Ø H7 (mm)
D15-16
Outside diameter (mm)B32
Outside diameter with screw head (mm)BS32
Moment of inertia D1 (10-3 kgm2)J10,003
Moment of inertia D2 (10-3 kgm2)J20,01
Approximate weight (kg)0,05
Fastening screw ISO 4762E1M4
Fastening screw ISO 4762E2M5
Distance between centerlines (mm)F10,5
Distance (mm)G5
Speed standard (min -1)13000
Mounting length (mm)C110,3
Fit length (mm)C220
Outside diameter range h7 (mm)D213-25
Maximum torque* (Nm)TKmax25|32|6
Overall length (mm)A28
Inside diameter of elastomer (mm)DE14,2
Tightening torqueE14
Tightening torque (Nm)E29
Length (mm)H7
10
CAD
EK7 Series
Type (Elastomer insert)
Rated torque (Nm)TKN
Inside diameter possible from Ø to Ø H7 (mm)D1
Outside diameter (mm)B
Outside diameter with screw head (mm)BS
Moment of inertia D1 (10-3 kgm2)J1
Moment of inertia D2 (10-3 kgm2)J2
Approximate weight (kg)
Fastening screw ISO 4762E1
Fastening screw ISO 4762E2
Distance between centerlines (mm)F
Distance (mm)G
Speed standard (min -1)
Mounting length (mm)C1
Fit length (mm)C2
Outside diameter range h7 (mm)D2
Maximum torque* (Nm)TKmax
Overall length (mm)A
Inside diameter of elastomer (mm)DE
Tightening torqueE1
Tightening torque (Nm)E2
Length (mm)H
CAD Portal
EK7 Serien20
Type (Elastomer insert)A|B|C
Rated torque (Nm)TKN17|21|6
Inside diameter possible from Ø to Ø H7 (mm)
D18-25
Outside diameter (mm)B42
Outside diameter with screw head (mm)BS44,5
Moment of inertia D1 (10-3 kgm2)J10,01
Moment of inertia D2 (10-3 kgm2)J20,04
Approximate weight (kg)0,12
Fastening screw ISO 4762E1M5
Fastening screw ISO 4762E2M6
Distance between centerlines (mm)F15,5
Distance (mm)G8,5
Speed standard (min -1)12500
Mounting length (mm)C117
Fit length (mm)C225
Outside diameter range h7 (mm)D214-30
Maximum torque* (Nm)TKmax34|42|12
Overall length (mm)A40
Inside diameter of elastomer (mm)DE19,2
Tightening torqueE18
Tightening torque (Nm)E212
Length (mm)H10
20
CAD
EK7 Series
Type (Elastomer insert)
Rated torque (Nm)TKN
Inside diameter possible from Ø to Ø H7 (mm)D1
Outside diameter (mm)B
Outside diameter with screw head (mm)BS
Moment of inertia D1 (10-3 kgm2)J1
Moment of inertia D2 (10-3 kgm2)J2
Approximate weight (kg)
Fastening screw ISO 4762E1
Fastening screw ISO 4762E2
Distance between centerlines (mm)F
Distance (mm)G
Speed standard (min -1)
Mounting length (mm)C1
Fit length (mm)C2
Outside diameter range h7 (mm)D2
Maximum torque* (Nm)TKmax
Overall length (mm)A
Inside diameter of elastomer (mm)DE
Tightening torqueE1
Tightening torque (Nm)E2
Length (mm)H
CAD Portal
EK7 Serien60
Type (Elastomer insert)A|B|C
Rated torque (Nm)TKN60|75|20
Inside diameter possible from Ø to Ø H7 (mm)
D112-32
Outside diameter (mm)B56
Outside diameter with screw head (mm)BS57
Moment of inertia D1 (10-3 kgm2)J10,04
Moment of inertia D2 (10-3 kgm2)J20,1
Approximate weight (kg)0,3
Fastening screw ISO 4762E1M6
Fastening screw ISO 4762E2M8
Distance between centerlines (mm)F21
Distance (mm)G10
Speed standard (min -1)11000
Mounting length (mm)C120
Fit length (mm)C227
Outside diameter range h7 (mm)D223-36
Maximum torque* (Nm)TKmax120|150|35
Overall length (mm)A46
Inside diameter of elastomer (mm)DE26,2
Tightening torqueE115
Tightening torque (Nm)E232
Length (mm)H11
60
CAD
EK7 Series
Type (Elastomer insert)
Rated torque (Nm)TKN
Inside diameter possible from Ø to Ø H7 (mm)D1
Outside diameter (mm)B
Outside diameter with screw head (mm)BS
Moment of inertia D1 (10-3 kgm2)J1
Moment of inertia D2 (10-3 kgm2)J2
Approximate weight (kg)
Fastening screw ISO 4762E1
Fastening screw ISO 4762E2
Distance between centerlines (mm)F
Distance (mm)G
Speed standard (min -1)
Mounting length (mm)C1
Fit length (mm)C2
Outside diameter range h7 (mm)D2
Maximum torque* (Nm)TKmax
Overall length (mm)A
Inside diameter of elastomer (mm)DE
Tightening torqueE1
Tightening torque (Nm)E2
Length (mm)H
CAD Portal
EK7 Serien150
Type (Elastomer insert)A|B|C
Rated torque (Nm)TKN160|200|42
Inside diameter possible from Ø to Ø H7 (mm)
D119-36
Outside diameter (mm)B66,5
Outside diameter with screw head (mm)BS68
Moment of inertia D1 (10-3 kgm2)J10,08
Moment of inertia D2 (10-3 kgm2)J20,2
Approximate weight (kg)0,5
Fastening screw ISO 4762E1M8
Fastening screw ISO 4762E2M10
Distance between centerlines (mm)F24
Distance (mm)G11
Speed standard (min -1)10000
Mounting length (mm)C121
Fit length (mm)C232
Outside diameter range h7 (mm)D226-42
Maximum torque* (Nm)TKmax320|400|85
Overall length (mm)A51
Inside diameter of elastomer (mm)DE29,2
Tightening torqueE135
Tightening torque (Nm)E260
Length (mm)H16
150
CAD
EK7 Series
Type (Elastomer insert)
Rated torque (Nm)TKN
Inside diameter possible from Ø to Ø H7 (mm)D1
Outside diameter (mm)B
Outside diameter with screw head (mm)BS
Moment of inertia D1 (10-3 kgm2)J1
Moment of inertia D2 (10-3 kgm2)J2
Approximate weight (kg)
Fastening screw ISO 4762E1
Fastening screw ISO 4762E2
Distance between centerlines (mm)F
Distance (mm)G
Speed standard (min -1)
Mounting length (mm)C1
Fit length (mm)C2
Outside diameter range h7 (mm)D2
Maximum torque* (Nm)TKmax
Overall length (mm)A
Inside diameter of elastomer (mm)DE
Tightening torqueE1
Tightening torque (Nm)E2
Length (mm)H
CAD Portal
EK7 Serien300
Type (Elastomer insert)A|B|C
Rated torque (Nm)TKN325|405|84
Inside diameter possible from Ø to Ø H7 (mm)
D120-45
Outside diameter (mm)B82
Outside diameter with screw head (mm)BS85
Moment of inertia D1 (10-3 kgm2)J10,3
Moment of inertia D2 (10-3 kgm2)J21
Approximate weight (kg)0,9
Fastening screw ISO 4762E1M10
Fastening screw ISO 4762E2M12
Distance between centerlines (mm)F29
Distance (mm)G15
Speed standard (min -1)9000
Mounting length (mm)C131
Fit length (mm)C245
Outside diameter range h7 (mm)D238-60
Maximum torque* (Nm)TKmax650|810|170
Overall length (mm)A68
Inside diameter of elastomer (mm)DE36,2
Tightening torqueE170
Tightening torque (Nm)E2110
Length (mm)H20
300
CAD
EK7 Series
Type (Elastomer insert)
Rated torque (Nm)TKN
Inside diameter possible from Ø to Ø H7 (mm)D1
Outside diameter (mm)B
Outside diameter with screw head (mm)BS
Moment of inertia D1 (10-3 kgm2)J1
Moment of inertia D2 (10-3 kgm2)J2
Approximate weight (kg)
Fastening screw ISO 4762E1
Fastening screw ISO 4762E2
Distance between centerlines (mm)F
Distance (mm)G
Speed standard (min -1)
Mounting length (mm)C1
Fit length (mm)C2
Outside diameter range h7 (mm)D2
Maximum torque* (Nm)TKmax
Overall length (mm)A
Inside diameter of elastomer (mm)DE
Tightening torqueE1
Tightening torque (Nm)E2
Length (mm)H
CAD Portal
EK7 Serien450
Type (Elastomer insert)A|B|C
Rated torque (Nm)TKN530|660|95
Inside diameter possible from Ø to Ø H7 (mm)
D128-60
Outside diameter (mm)B102
Outside diameter with screw head (mm)BS105
Moment of inertia D1 (10-3 kgm2)J10,66
Moment of inertia D2 (10-3 kgm2)J22,6
Approximate weight (kg)1,5
Fastening screw ISO 4762E1M12
Fastening screw ISO 4762E2M16
Distance between centerlines (mm)F38
Distance (mm)G17,5
Speed standard (min -1)8000
Mounting length (mm)C134
Fit length (mm)C255
Outside diameter range h7 (mm)D242-70
Maximum torque* (Nm)TKmax1060|1350|190
Overall length (mm)A76
Inside diameter of elastomer (mm)DE46,2
Tightening torqueE1120
Tightening torque (Nm)E2240
Length (mm)H27
450
CAD
EK7 Series
Type (Elastomer insert)
Rated torque (Nm)TKN
Inside diameter possible from Ø to Ø H7 (mm)D1
Outside diameter (mm)B
Outside diameter with screw head (mm)BS
Moment of inertia D1 (10-3 kgm2)J1
Moment of inertia D2 (10-3 kgm2)J2
Approximate weight (kg)
Fastening screw ISO 4762E1
Fastening screw ISO 4762E2
Distance between centerlines (mm)F
Distance (mm)G
Speed standard (min -1)
Mounting length (mm)C1
Fit length (mm)C2
Outside diameter range h7 (mm)D2
Maximum torque* (Nm)TKmax
Overall length (mm)A
Inside diameter of elastomer (mm)DE
Tightening torqueE1
Tightening torque (Nm)E2
Length (mm)H
CAD Portal
EK7 Serien800
Type (Elastomer insert)A|B|C
Rated torque (Nm)TKN950|1100|240
Inside diameter possible from Ø to Ø H7 (mm)
D135-80
Outside diameter (mm)B136,5
Outside diameter with screw head (mm)BS139
Moment of inertia D1 (10-3 kgm2)J18
Moment of inertia D2 (10-3 kgm2)J29
Approximate weight (kg)7,6
Fastening screw ISO 4762E1M16
Fastening screw ISO 4762E2M16
Distance between centerlines (mm)F50,5
Distance (mm)G23
Speed standard (min -1)4000
Mounting length (mm)C146
Fit length (mm)C260
Outside diameter range h7 (mm)D242-80
Maximum torque* (Nm)TKmax1900|2150|400
Overall length (mm)A94
Inside diameter of elastomer (mm)DE60,5
Tightening torqueE1290
Tightening torque (Nm)E2300
Length (mm)H27
800
CAD

Properties

  • Design: Two coupling hubs are concentrically machined with curved jaws.

    • one side with clamping hub and screw per ISO 4762.

    • one side with expanding shaft and internally tapered
clamping element.
  • Tolerance: Overall clearance between shaft and hub 0.01 to 0.05 mm. Suggested bore tolerance for expanding shaft ISO H7.
  • Material:
    • clamping hub: up to series 450 high strength aluminum, from series 800 and up steel

    • expanding shaft and cone: steel

    • elastomer insert: precision molded, wear resistant, and thermally stable polymer
  • Speeds: See table below, *Please contact R+W
                  ISO 2.5 balance grade available
  • Properties of Elastomer Coupling model EK7:
    • short compact design
    • easy mounting
    • concentrically machined hubs
    • axial installation with expanding shaft
    • backlash free
    • electrically isolating


Overview