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ROTEX 19 Coupling Replacement – Flexible Jaw Coupling

Model Number
Check below, custom

D-Diameter, L-Length, d(borerange)
Rotex14 D30-L35-d(6~16)
Rotex19 D40-L66-d(6~25)
Rotex24 D55-L78-d(8~35)
Rotex28 D65-L90-d(10~42)
Rotex38 D80-L114-d(10~50)
Rotex42 D95-L126-d(10~55)
Rotex48 D105-L140-d(10~65)
Rotex55 D120-L160-d(15~70)
Rotex65 D135-L185-d(15~75)
Rotex75 D160-L210-d(20~95)
Rotex90 D200-L245-d(30~100)
Rotex100 D225-L270-d(30~110)
Rotex110 D255-L295-d(40~125)
Rotex125 D290-L340-d(40~145)

Rotex140 D320-L375-d(40~165)
Rotex160 D370-L425-d(60~190)
Rotex180 D420-L475-d(80~200)

Product Description

ROTEX 19 Coupling Replacement – Flexible Jaw Coupling

Product Overview

Apex Coupling supplies ROTEX-compatible flexible jaw coupling replacements for industrial power transmission applications. The ROTEX 19 size is designed for compact shaft connections where torque transmission, vibration damping and flexible coupling performance are required.

This jaw coupling design uses two metal hubs and an elastomeric element, commonly known as a spider. The elastomer helps accommodate limited shaft misalignment and reduce the transmission of vibration and shock loads. Actual performance depends on the selected hub dimensions, elastomer material, operating speed and application conditions.

The ROTEX-compatible coupling range includes multiple sizes, from ROTEX 14 to ROTEX 180, with customizable bore dimensions available for different shaft requirements. The ROTEX 19 model listed in the supplied dimensional data has a nominal outer diameter of 40 mm, an overall length of 66 mm and a bore range of 6–25 mm. Please confirm the drawing and dimensions before ordering.

Apex Coupling supports OEM and ODM inquiries for customized bore sizes, materials and configurations, subject to technical review.

Key Features

Flexible jaw design: Metal hubs connect through an elastomeric spider.
Compact construction: Suitable for space-conscious industrial drive systems.
Vibration damping: The elastomeric element can help absorb shock and reduce vibration.
Customizable bores: Available bore options depend on the selected model and manufacturing requirements.
Multiple size options: Models are listed from ROTEX 14 through ROTEX 180.
Material options: Steel and selected stainless steel materials may be available, subject to confirmation.
Axial plug-in installation: The coupling design supports axial assembly; follow the instructions for the specific configuration.
OEM/ODM support: Custom requirements can be reviewed against drawings and operating conditions.

ROTEX-Compatible Coupling Specifications

Parameter	ROTEX 19 Specification
Product Type	Flexible Jaw Coupling
Design	Jaw / Spider Coupling
Model	ROTEX 19 compatible
Outer Diameter	40 mm
Overall Length	66 mm
Listed Bore Range	6–25 mm
Hub Material	Confirm selected material and model
Elastomer	Spider element; confirm material and hardness
Temperature Range	-35°C to +80°C listed for the stated elastomer; verify material and operating conditions
Surface Treatment	Blackening listed for selected steel configurations
Customization	OEM / ODM / Custom Bore
Minimum Order Quantity	1 set, as supplied
Warranty	1 year, subject to applicable terms
Certificates	ISO 9001 and BV certificate listed; confirm scope and applicability

Important: The supplied data also lists 98 Shore A elastomer hardness, a torque value of 2,000 N·m and an RPM entry of “3800-1000.” These values require model-specific verification before publication. Do not treat the 2,000 N·m figure as the rated torque for ROTEX 19, and do not publish the unclear RPM entry as a valid speed range.

How a Flexible Jaw Coupling Works

A flexible jaw coupling typically consists of two metal hubs with interlocking jaws and an elastomeric spider positioned between them.

When the driving shaft rotates, one hub transfers torque through the elastomer to the driven hub. The elastomer provides flexibility and can reduce the transmission of some vibration and shock loads.

The allowable torque, speed, misalignment and temperature depend on the hub design and elastomer specification. Excessive misalignment, overloading, unsuitable temperature or incorrect installation can shorten the service life of the spider.

Available Sizes

The supplied dimensional list includes the following ROTEX-compatible sizes:

Model	Outer Diameter (D)	Length (L)	Listed Bore Range
ROTEX 14	30 mm	35 mm	6–16 mm
ROTEX 19	40 mm	66 mm	6–25 mm
ROTEX 24	55 mm	78 mm	8–35 mm
ROTEX 28	65 mm	90 mm	10–42 mm
ROTEX 38	80 mm	114 mm	10–50 mm
ROTEX 42	95 mm	126 mm	10–55 mm
ROTEX 48	105 mm	140 mm	10–65 mm
ROTEX 55	120 mm	160 mm	15–70 mm
ROTEX 65	135 mm	185 mm	15–75 mm
ROTEX 75	160 mm	210 mm	20–95 mm
ROTEX 90	200 mm	245 mm	30–100 mm
ROTEX 100	225 mm	270 mm	30–110 mm
ROTEX 110	255 mm	295 mm	40–125 mm
ROTEX 125	290 mm	340 mm	40–145 mm
ROTEX 140	320 mm	375 mm	40–165 mm
ROTEX 160	370 mm	425 mm	60–190 mm
ROTEX 180	420 mm	475 mm	80–200 mm

Dimensions are reproduced from the supplied product information. Confirm whether the length and bore ranges refer to the complete assembly, individual hubs or specific configurations before placing an order.

Material and Elastomer Options

The supplied product information lists 45# steel as a body material and also mentions 42CrMo alloy steel, 304 stainless steel and 316 stainless steel as potential material options.

Availability depends on the size, design and application. Confirm the selected hub material and surface treatment in the quotation.

The elastomeric spider is a key functional component. Its material and hardness influence torsional stiffness, damping, temperature suitability and torque capacity. The supplied information lists 98 Shore A; verify the exact spider material and hardness for your required model.

Typical Applications

Depending on the verified ratings and environmental requirements, flexible jaw couplings may be used in:

Industrial pumps and mechanical drives
Manufacturing and production equipment
Packaging and printing machinery
General industrial automation
Machinery repair and maintenance
Selected construction and processing equipment

For demanding or continuous-duty applications, verify the required torque, speed, shaft alignment, start-up loads and temperature before selecting the coupling.

How to Choose a ROTEX 19 Replacement

1. Check the Model and Dimensions

Confirm the required size, outer diameter, overall length and mounting arrangement. Do not select a replacement by model name alone.

2. Measure Both Shaft Diameters

Provide the driving and driven shaft diameters separately. Specify keyways or other shaft connection requirements.

3. Verify Torque and Speed

Share continuous torque, peak torque, normal speed, maximum speed and duty cycle. Confirm the ratings of the complete coupling and the selected elastomer.

4. Select the Elastomer

Choose the spider according to torque, torsional stiffness, damping, operating temperature and environmental exposure. Hardness alone is not enough to establish suitability.

5. Check Alignment and Installation

Review angular, parallel and axial misalignment limits in the manufacturer’s documentation. Confirm available installation space and follow the specified assembly procedure.

OEM and ODM Coupling Customization

Apex Coupling supports customization inquiries for flexible jaw couplings, including:

Bore diameter and shaft connection requirements
Selected hub material
Elastomer specification, subject to availability
Dimensions based on customer drawings
OEM/ODM manufacturing requirements

Provide the model, shaft dimensions, required torque, speed, operating temperature and quantity when requesting a quotation.

Request a Quote

Looking for a ROTEX 19 coupling replacement? Contact Apex Coupling to confirm dimensions, compatible components, material options and technical ratings.

Email: ella@apexcoupling.com
WhatsApp: +86 13437856962

Send a drawing or the dimensions of your existing coupling to help us assess the replacement requirements.

Frequently Asked Questions

Is this an original ROTEX coupling?

The product is offered as a ROTEX-compatible replacement. Do not assume it is manufactured by or officially affiliated with the original brand.

What are the dimensions of the ROTEX 19 model?

The supplied data lists an outer diameter of 40 mm, a length of 66 mm and a bore range of 6–25 mm. Confirm the dimensional drawing and configuration before ordering.

Can the bore size be customized?

The supplied product information indicates customizable bore sizes. Confirm the required shaft diameters and connection details.

Is the coupling suitable for high-speed operation?

Suitability depends on the complete assembly, balance, hub dimensions, elastomer and operating conditions. Obtain a verified speed rating for the selected model.

What temperature can the spider withstand?

The supplied information lists -35°C to +80°C for the stated elastomer specification. Confirm the exact material and its allowable temperature range for the selected configuration.