ECHT-FLEX Coupling NEF Series (​Disc Coupling)

Product Photos
  • Boasting an extensive lineup, this is the definitive disc coupling.
  • The disc shape is optimally designed using FEM, ensuring reliable torque transmission and absorbing misalignment, while also providing excellent features such as high-precision positioning and no lubrication.
    ​
  • There are a wide variety of shaft fastening methods available, and environmentally resistant specifications are also available.
  • Torque range: 19.6 to 6860 N m / Applicable shaft diameter: Φ9 mm to Φ130 mm

Features

  • -Since there are no sliding parts, it can be used for a long period of time without lubrication.
  • -High torsional rigidity: Combines high torsional rigidity with excellent flexibility.
  • · Environmentally resistant specifications are also available: Stainless steel and electroless nickel plating types are also available.
  • ・Shaft fastening method: We have a wide range of options available. Please refer to item 2 below for details.
  • -Long spacer type also available: Suitable for line shaft drives when combined with Miter Gear Box. Stock long spacers are also available.

How to fasten to the shaft

    • ・Key fastening: Applicable range: NEF02 to NEF700

      This is a fastening method using a general key. We have products with standard shaft holes processed to the new JIS standard key type available, so we can deliver them in a Quick delivery.

    Key fastening

    • ・Taper lock fastening (non-backlash): Applicable range: NEF04 to NEF25

      By using a special tapered lock hub, this friction fastening system achieves both high torque and compactness.
      Ideal for driving servo motors.

    Taper lock fastening

    • ・Clamp fastening (non-backlash): Applicable range: NEF02 to NEF45

      Friction fastening is possible with one bolt per hub. In addition, the bolt is fastened perpendicular to the shaft, reducing the space required in the axial direction.

    Clamp fastening

    • ・ Power-Lock fastening (non-backlash): Applicable range: NEF04 to NEF25

      This is a friction locking system that combines the EL series Power-Lock with a pressure flange. It can also be combined with other Power-Lock series.
      Please contact us for details.

    Power-Lock fastening

Hub Type

  • ・Standard hub

    This is a standard hub that is commonly used.

  • ・ Extended Dia. Hub

    If the shaft diameter exceeds the maximum shaft hole diameter of a standard hub even though there is sufficient transmission capacity, you can use Extended Dia. Hub with a larger boss diameter H as shown in the diagram below, without having to increase the size.
    ​

  • ・ Long Hub

    If the key surface pressure is too high with a standard hub, you can reduce the key surface pressure by using Long Hub with hub length B as shown in the diagram below.

  • ・ Square hub

    This type is used in combination with Power-Lock EL Series and pressure flange. The tap for the pressure bolt is already machined.

Hub Type

Size List

Model number Allowable Torque
N・m		 Keyway shaft hole diameter range Model number Allowable Torque
N・m		 Keyway shaft hole diameter range
Standard, Long Hub Extended Dia. Hub Standard, Long Hub Extended Dia. Hub
NEF02 19.6 Φ9～Φ20 Φ21～Φ25 NEF80 784 Φ17～Φ60 Φ61～Φ70
NEF04 39.2 Φ9～Φ23 Φ24～Φ29 NEF130 1270 Φ28～Φ74 Φ75～Φ80
NEF10 98 Φ11～Φ32 Φ33～Φ40 NEF210 2060 Φ28～Φ83 Φ84～Φ90
NEF18 176 Φ14～Φ35 Φ36～Φ42 NEF340 3330 Φ46～Φ95 Φ96～Φ110
NEF25 245 Φ16～Φ42 Φ43～Φ48 NEF540 5290 Φ52～Φ109 Φ110～Φ120
NEF45 441 Φ16～Φ50 Φ51～Φ60 NEF700 6860 Φ52～Φ118 Φ119～Φ130

Structure

Structural diagram

ECHT-FLEX Coupling​ Assembly Instructions

・You can watch an easy-to-understand video showing the assembly steps for the NEF series.

Long spacer

  • ・Can be used with a floating shaft

    A floating shaft can be used when there is a distance between devices.

  • -Large allowable eccentricity

    Depending on the length, a large eccentricity can be tolerated.

  • ・Ideal for line shaft drives

    Suitable for line shaft drive in combination with Miter Gear Box.

  • -Long spacers are also available in stock

    We have long spacers of specific dimensions in stock, so we can deliver them to you without making you wait.The JS type has a well-balanced design equivalent to G6.3/1800 r/min.

  • - Hub end face distance (J dimension) up to 6m

    Hub face distances up to 6000mm are possible.


List of long spacer models in stock

○ indicates the JS type (dynamic balance G6.3/1800 r/min equivalent), ● indicates the standard long spacer (welded structure).

Model number Spacer length J dimension (mm)
100 127 140 180 200 250 300 350 400 450 500 600
NEF04W ● ● ● ● ● ● ● ●
NEF10W ○ ○ ● ● ● ● ● ● ● ●
NEF18W ○ ○ ● ● ● ● ● ● ● ●
NEF25W ○ ○ ○ ● ● ● ● ● ● ● ●
NEF45W ○ ○ ○ ○ ○ ○
NEF80W ○ ○ ○ ○ ○
NEF130W ○ ○ ○ ○ ○
NEF210W ○ ○ ○
NEF340W ○ ○

Environmentally resistant specifications (please contact us)

NEF stainless steel specifications

  • Features

    Rust-resistant and clean: All parts are made of stainless steel, providing excellent corrosion resistance.

    Less dust generation and clean: Torque is transmitted by friction, so there is no sliding between parts and no need to worry about wear dust.

  • ・Application

    For rust prevention in clean rooms.

    Applications where water is directly sprayed on the product, such as food processing machinery.

    Highly corrosive atmospheres such as water treatment facilities.

    *It has also been used in vacuum environments. Please contact us regarding specifications.

NEF stainless steel specifications

NEF electroless nickel plating specifications

  • Features

    Excellent cost performance: Compared to stainless steel specifications, it has excellent cost performance.

    Beautiful appearance: The film thickness is uniform and does not peel off easily, so it looks beautiful when used.

  • ・Application

    For simple rust prevention in clean rooms.

    Suitable for applications with relatively low cleanliness requirements.

    For transporting flat panel displays and driving lifting devices.

    Other applications where mild rust prevention is required, such as in humid environments.

NEF electroless nickel plating specifications

NEF CFRP spacer specifications

  • We offer long spacers made of lightweight, corrosion-resistant CFRP (carbon fiber reinforced plastic).

    Ideal for connecting the motor and reducer that drives the cooling fan of a cooling tower.

    Please contact us for more details.

Catalogs and Instruction Manuals

Model number display example

NEF 25 W - NH70ED2 V X KH120JD2 - J 1000
｜
series		 ｜
size		 ｜
｜
｜
 ｜
Left hub symbol		 ｜
｜
｜
 ｜
Right hub symbol		 ｜
｜
｜
 ｜
J dimension
type
W: Spacer type
S: Single type		 Vertical
Vertical long spacer
Indicates the diameter of the shaft hole on the bottom side.		 Long spacer
J: Long spacer
JS: Fixed-size long spacer
JT: Single-plate long spacer
Long spacers
Please refer to the catalogue
Hub symbol details
Hub shape Shaft hole diameter tolerance Shaft Hole Diameter Keyway tolerance Set screw position
N H 70 E D2
K H 120 J D2
N:標準ハブ
K:拡大ハブ
L:延長ハブ
B:角ハブ
H:テーパロックハブ		 F:F7
G:G7
H:H7
J:JS7
P:P7
M:M7
N:N7
K:K7
R:R7		 Shaft hole diameter is
in 1mm increments		 J: New JIS Js9 (standard)
P: New JIS P9
F: Old JIS F7
E: Old JIS E9
[Click to enlarge]

■Product model number navigation/product detail information check (Shaft fastening methods other than keyway specifications can also be selected.)

SpecificationLeft hubRight hub
Size and allowable torque
type 　　
Environmentally resistant specifications 　　 　　
Shaft Hole Diameter
Shaft fastening method
Hub Type
Shaft hole diameter tolerance
Keyway tolerance
Set screw position
Spacer specifications and length

Selectable model number:

View product details

Start over

Back to top of this page