ECHT-FLEX couplings transmit power through the frictional force of the disc when the reamer bolt and U-nut are fastened together. Therefore, there is no play or sliding, and no need for oiling.

The allowable torque is determined by the frictional force between the reamer bolt and the disc when the U-nut is tightened. If a load greater than the allowable torque is applied, slippage will occur, which may result in damage to the coupling. Note that the allowable torque may decrease depending on the fastening method, so please refer to the catalog for details.

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Heat resistant temperature: 200℃
Cold resistance temperature: up to -30°C.
(Note) All types other than Square hub type with clamp fastening system use Nylock bolts, so the heat resistance temperature is up to 170°C.

Electroless nickel plating is standardized as a simple rust prevention method, mainly for clean room use. Stainless steel specifications are also available, so please feel free to contact us for more information.

Painting ECHT-FLEX coupling is not recommended as the outer diameter dimensions will change depending on the film thickness, which will interfere with centering. If painting is absolutely necessary, please contact us.

The allowable torque is the value when the U-nut is tightened to the specified tightening torque, so tightening without a torque wrench can cause accidents such as slippage due to insufficient tightening or deformation of parts due to excessive tightening. Always use a torque wrench when tightening and tighten to the specified tightening torque.

The reamer bolt can be inserted from either side. However, the directions of washers A and B are fixed, so please assemble according to the instructions in Instruction Manuals or catalog.

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When tightening the U-nut, if a thrust load is applied to the coupling, the disc will move in an axial direction with a rattling sound. We call this phenomenon "wobbling phenomenon" (snapping), and since extra stress is being applied to the disc, we do not recommend using it in this state. If wobbling phenomenon occurs, loosen the U-nut and reassemble it with no thrust load applied to the coupling to resolve the problem.

Reamer bolts for ECHT-FLEX couplings are specially designed products and are not compatible with commercially available products. If you need reamer bolts, please order them from your dealer.

The hubs, discs, and bolts used in the single type, spacer type, and long spacer type are common and compatible.

The single type only absorbs angular misalignment, not parallel misalignment. It is recommended only for installations that allow precise centering with NC machine tools and servo motors. Generally, use the spacer type.

If vibration or noise is a problem, balance adjustment may be required after the device is assembled. If you specify the balance class and rotation speed, we will consider whether or not adjustment is possible.

When using a long spacer type at high speeds, it is necessary to check the rotational speed to avoid dangerous speeds. When selecting a product, please check the catalog to ensure that the hub end face distance (J dimension) and rotational speed for each model number are within the limits. Please contact us for details.

ECHT-FLEX coupling long spacer type can be manufactured with a maximum distance between hub ends of 6,000 mm (sizes below NEH41W).
However, there may be cases where consideration is required for use, so please contact us for further details.

There is no problem with standard spacer types and single types. For long spacer types, if the distance between hub end faces (J dimension) exceeds the table below, a special structure is required to support the bearing's own weight, so please contact us.

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By making the overall length and hub length the same as the gear coupling, it can be replaced as is. By replacing it with ECHT-FLEX coupling, lubrication is no longer necessary, reducing maintenance man-hours. (Made to order)
(Note) Please check the catalog for allowable misalignment values.

Yes, it is. However, you must check the boss diameter of the hub to see if it can withstand the surface pressure generated by Power-Lock. Generally, we recommend the KE series, which can accommodate a wide range of shaft tolerances, or the TF series, which is designed for small hub diameter.

Whether or not Power-Lock with a hollow shaft.

If precise alignment of the keyway phase is required, please specify "keyway phase alignment specifications" when placing your order. In this case, the maximum phase difference will be ±2 degrees. If even higher precision phase alignment is required, we recommend the Power-Lock specification.

We can manufacture Φ16 (1/10 taper) or Φ11 (1/10 taper) for servo motor shafts. For other dimensions, we can manufacture if you provide a taper gauge.

Roller chain coupling consist of a main body and a case. To allow them to be sold separately, the product name is suffixed with "H" for the main body and "K" for the case, but the letter "J" is stamping on both the main body and case to indicate that they comply with JIS standards.

Product name display example
・Main unit: CR5016H
Case: CR5016K

Example of product stamping
・Main unit and case: CR5016-J

The following parts are sold individually.

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The coupling-specific chain is based on a two-strand RS roller chain, so it can be used. However, the dedicated roller chain can be attached and detached by inserting and removing one coupling pin. If a two-strand standard roller chain is used, it will be connected with a coupling link, which makes assembly slightly less easy, so we recommend using the dedicated roller chain. The model numbers have the following meanings:

Since it is based on the Tsubaki RS roller chain, it is the same as the connecting links of RS roller chain.

・CR3012H to CR6022H: spring clip
・CR8018H to CR20022H: Cotter pin

Oil seals are special parts and are not available commercially.

Each company has its own unique design, and the dimensions are slightly different, so installation is not possible.

We do not sell dedicated grease, so please use commercially available products. The recommended products are as follows:

The recommended grease for special applications of the stainless steel series is as follows.

■Food grease
Balbis Co., Ltd.: Power Food Grease
NOK Kluber Co., Ltd.: Kluber Foods NH1 94-301
■Water-resistant food grease
NOK Kluber Co., Ltd.: Kluber Foods NH1 64-422
Sumiko Lubricant Co., Ltd.: White Alcom Grease No. 2
■Water-resistant grease
Sumiko Lubricant Co., Ltd.: Mori FM-HD Grease No.1
■ Cold-resistant grease
ENEOS Corporation: Epinoc Grease LT -40 to 120°C
■Heat-resistant grease
Idemitsu.: Daphne Eponex SR2 -20 to 160°C
ENEOS Corporation: Pyronoc Universal -20 to 175°C
■Fluorine-based grease for clean rooms
Sumiko Lubricant Co., Ltd.: Sumitec F936

One side is press fit, and the oil seal side is designed to absorb misalignment while preventing grease leakage.