EK7
Elastomer Coupling with expanding shaft

2 - 2,150 Nm

EK7 ELASTOMER COUPLING WITH EXPANDING SHAFT

  • EK7
  • Specifications EK7

    EK7 Series
    Type
    Rated torque (Nm)TKN
    Inside diameter possible from Ø to Ø H7 (mm)D1
    Inside diameter of elastomer (mm)DE
    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 4762)E1
    Fastening screw (ISO 4762)E2
    Distance between centerlines (mm)F
    Distance (mm)G
    Speed standard (min -1)
    Speed balanced (10³min-1)
    Mounting length (mm)C1
    Fit length (mm)C2
    Outside diameter range h7 (mm)D2
    Maximum torque* (Nm)TKmax
    Overall length (mm)A
    Tightening torqueE1
    Tightening torque (Nm)E2
    Length (mm)H
    CAD Portal
    EK7 Serien5
    TypeA|B|C
    Rated torque (Nm)TKN9|12|2
    Inside diameter possible from Ø to Ø H7 (mm)
    D14-12,7
    Inside diameter of elastomer (mm)DE10,2
    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 4762)E1M3
    Fastening screw (ISO 4762)E2M4
    Distance between centerlines (mm)F8
    Distance (mm)G4
    Speed standard (min -1)15000
    Speed balanced (10³min-1)57|65|43
    Mounting length (mm)C18
    Fit length (mm)C212
    Outside diameter range h7 (mm)D210-16
    Maximum torque* (Nm)TKmax18|24|4
    Overall length (mm)A22,3
    Tightening torqueE12
    Tightening torque (Nm)E24
    Length (mm)H7
    5
    CAD
    EK7 Series
    Type
    Rated torque (Nm)TKN
    Inside diameter possible from Ø to Ø H7 (mm)D1
    Inside diameter of elastomer (mm)DE
    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 4762)E1
    Fastening screw (ISO 4762)E2
    Distance between centerlines (mm)F
    Distance (mm)G
    Speed standard (min -1)
    Speed balanced (10³min-1)
    Mounting length (mm)C1
    Fit length (mm)C2
    Outside diameter range h7 (mm)D2
    Maximum torque* (Nm)TKmax
    Overall length (mm)A
    Tightening torqueE1
    Tightening torque (Nm)E2
    Length (mm)H
    CAD Portal
    EK7 Serien10
    TypeA|B|C
    Rated torque (Nm)TKN12,5|16|4
    Inside diameter possible from Ø to Ø H7 (mm)
    D15-16
    Inside diameter of elastomer (mm)DE14,2
    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 4762)E1M4
    Fastening screw (ISO 4762)E2M5
    Distance between centerlines (mm)F10,5
    Distance (mm)G5
    Speed standard (min -1)13000
    Speed balanced (10³min-1)53|63|40
    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
    Tightening torqueE14
    Tightening torque (Nm)E29
    Length (mm)H7
    10
    CAD
    EK7 Series
    Type
    Rated torque (Nm)TKN
    Inside diameter possible from Ø to Ø H7 (mm)D1
    Inside diameter of elastomer (mm)DE
    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 4762)E1
    Fastening screw (ISO 4762)E2
    Distance between centerlines (mm)F
    Distance (mm)G
    Speed standard (min -1)
    Speed balanced (10³min-1)
    Mounting length (mm)C1
    Fit length (mm)C2
    Outside diameter range h7 (mm)D2
    Maximum torque* (Nm)TKmax
    Overall length (mm)A
    Tightening torqueE1
    Tightening torque (Nm)E2
    Length (mm)H
    CAD Portal
    EK7 Serien20
    TypeA|B|C
    Rated torque (Nm)TKN17|21|6
    Inside diameter possible from Ø to Ø H7 (mm)
    D18-25
    Inside diameter of elastomer (mm)DE19,2
    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 4762)E1M5
    Fastening screw (ISO 4762)E2M6
    Distance between centerlines (mm)F15,5
    Distance (mm)G8,5
    Speed standard (min -1)12500
    Speed balanced (10³min-1)45|60|35
    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
    Tightening torqueE18
    Tightening torque (Nm)E212
    Length (mm)H10
    20
    CAD
    EK7 Series
    Type
    Rated torque (Nm)TKN
    Inside diameter possible from Ø to Ø H7 (mm)D1
    Inside diameter of elastomer (mm)DE
    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 4762)E1
    Fastening screw (ISO 4762)E2
    Distance between centerlines (mm)F
    Distance (mm)G
    Speed standard (min -1)
    Speed balanced (10³min-1)
    Mounting length (mm)C1
    Fit length (mm)C2
    Outside diameter range h7 (mm)D2
    Maximum torque* (Nm)TKmax
    Overall length (mm)A
    Tightening torqueE1
    Tightening torque (Nm)E2
    Length (mm)H
    CAD Portal
    EK7 Serien60
    TypeA|B|C
    Rated torque (Nm)TKN60|75|20
    Inside diameter possible from Ø to Ø H7 (mm)
    D112-32
    Inside diameter of elastomer (mm)DE26,2
    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 4762)E1M6
    Fastening screw (ISO 4762)E2M8
    Distance between centerlines (mm)F21
    Distance (mm)G10
    Speed standard (min -1)11000
    Speed balanced (10³min-1)31|31|25
    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
    Tightening torqueE115
    Tightening torque (Nm)E232
    Length (mm)H11
    60
    CAD
    EK7 Series
    Type
    Rated torque (Nm)TKN
    Inside diameter possible from Ø to Ø H7 (mm)D1
    Inside diameter of elastomer (mm)DE
    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 4762)E1
    Fastening screw (ISO 4762)E2
    Distance between centerlines (mm)F
    Distance (mm)G
    Speed standard (min -1)
    Speed balanced (10³min-1)
    Mounting length (mm)C1
    Fit length (mm)C2
    Outside diameter range h7 (mm)D2
    Maximum torque* (Nm)TKmax
    Overall length (mm)A
    Tightening torqueE1
    Tightening torque (Nm)E2
    Length (mm)H
    CAD Portal
    EK7 Serien150
    TypeA|B|C
    Rated torque (Nm)TKN160|200|42
    Inside diameter possible from Ø to Ø H7 (mm)
    D119-36
    Inside diameter of elastomer (mm)DE29,2
    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 4762)E1M8
    Fastening screw (ISO 4762)E2M10
    Distance between centerlines (mm)F24
    Distance (mm)G11
    Speed standard (min -1)10000
    Speed balanced (10³min-1)22|26|18
    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
    Tightening torqueE135
    Tightening torque (Nm)E260
    Length (mm)H16
    150
    CAD
    EK7 Series
    Type
    Rated torque (Nm)TKN
    Inside diameter possible from Ø to Ø H7 (mm)D1
    Inside diameter of elastomer (mm)DE
    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 4762)E1
    Fastening screw (ISO 4762)E2
    Distance between centerlines (mm)F
    Distance (mm)G
    Speed standard (min -1)
    Speed balanced (10³min-1)
    Mounting length (mm)C1
    Fit length (mm)C2
    Outside diameter range h7 (mm)D2
    Maximum torque* (Nm)TKmax
    Overall length (mm)A
    Tightening torqueE1
    Tightening torque (Nm)E2
    Length (mm)H
    CAD Portal
    EK7 Serien300
    TypeA|B|C
    Rated torque (Nm)TKN325|405|84
    Inside diameter possible from Ø to Ø H7 (mm)
    D120-45
    Inside diameter of elastomer (mm)DE36,2
    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 4762)E1M10
    Fastening screw (ISO 4762)E2M12
    Distance between centerlines (mm)F29
    Distance (mm)G15
    Speed standard (min -1)9000
    Speed balanced (10³min-1)22|26|16
    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
    Tightening torqueE170
    Tightening torque (Nm)E2110
    Length (mm)H20
    300
    CAD
    EK7 Series
    Type
    Rated torque (Nm)TKN
    Inside diameter possible from Ø to Ø H7 (mm)D1
    Inside diameter of elastomer (mm)DE
    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 4762)E1
    Fastening screw (ISO 4762)E2
    Distance between centerlines (mm)F
    Distance (mm)G
    Speed standard (min -1)
    Speed balanced (10³min-1)
    Mounting length (mm)C1
    Fit length (mm)C2
    Outside diameter range h7 (mm)D2
    Maximum torque* (Nm)TKmax
    Overall length (mm)A
    Tightening torqueE1
    Tightening torque (Nm)E2
    Length (mm)H
    CAD Portal
    EK7 Serien450
    TypeA|B|C
    Rated torque (Nm)TKN530|660|95
    Inside diameter possible from Ø to Ø H7 (mm)
    D128-60
    Inside diameter of elastomer (mm)DE46,2
    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 4762)E1M12
    Fastening screw (ISO 4762)E2M16
    Distance between centerlines (mm)F38
    Distance (mm)G17,5
    Speed standard (min -1)8000
    Speed balanced (10³min-1)16|17|12
    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
    Tightening torqueE1120
    Tightening torque (Nm)E2240
    Length (mm)H27
    450
    CAD
    EK7 Series
    Type
    Rated torque (Nm)TKN
    Inside diameter possible from Ø to Ø H7 (mm)D1
    Inside diameter of elastomer (mm)DE
    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 4762)E1
    Fastening screw (ISO 4762)E2
    Distance between centerlines (mm)F
    Distance (mm)G
    Speed standard (min -1)
    Speed balanced (10³min-1)
    Mounting length (mm)C1
    Fit length (mm)C2
    Outside diameter range h7 (mm)D2
    Maximum torque* (Nm)TKmax
    Overall length (mm)A
    Tightening torqueE1
    Tightening torque (Nm)E2
    Length (mm)H
    CAD Portal
    EK7 Serien800
    TypeA|B|C
    Rated torque (Nm)TKN950|1100|240
    Inside diameter possible from Ø to Ø H7 (mm)
    D135-80
    Inside diameter of elastomer (mm)DE60,5
    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 4762)E1M16
    Fastening screw (ISO 4762)E2M16
    Distance between centerlines (mm)F50,5
    Distance (mm)G23
    Speed standard (min -1)4000
    Speed balanced (10³min-1)13|13|8
    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
    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