- Atra-Flex Flexible Couplings

ATR Inc. Corporate Headquarters located in Santa Ana, Ca USA has been manufacturing and providing ATRA-FLEX® quality flexible couplings to the power Transmission Industry for more than 36 years. We are distributed through our Independent Sales Representatives and our Global Distributor Partners. We are proud to be recognized as innovators in the industry and continue our commitment in offering long term solutions and quality non lubricant flexible couplings that will continue to provide protection on your investment in your driven equipment.

ATRA-FLEX® Innovated Others Followed

Now there’s a new solution to one of the most persistent and troublesome problems facing maintenance personnel – periodic coupling failure and the downtime and expense that go with it. If a new insert is needed, a low-cost replacement can be installed in minutes without moving either the prime mover or the driven equipment.

ATRA- FLEX Millennium® and A series® There are only four parts in these two coupling series. The two identical hubs made of steel, each with four, six or eight teeth, depending on load and size. The split insert, which is made of specially compounded polyurethane, fits between the hubs. The outer steel holding ring has no nuts or bolts.

ADVANTAGES

Change out of coupling insert is faster than any other.
Custom compounded polyurethane inserts provide elasticity and resistance to high torque, shear and shock loads.
Unlike others, a single ATRA-FLEX coupling can be purchased to fit two different shaft sizes.
Elastic insert is highly resistant to humidity, oils, corrosion and chemicals; retains performance characteristics at temperatures from -60 degrees F to +250 degrees F
No lubrication or service is required.
ATRA-FLEX couplings may be installed horizontally or vertically; can rotate in either direction.
Operation is completely silent at all speeds and loads.
No metal-to-metal contact between coupling parts.
Initial cost is low, and maintenance and downtime are minimal.
High temperature insert (red) available up to +350 degrees F

Millennium®

A Series®

Save Money and Downtime with easy Assembly and Disassembly:

After hubs and holding ring are installed on shafts, the teeth are then aligned parallel to each other, but not touching. Once installed, the hubs never need to be moved again. The elastic insert can then be installed in the slots formed by the parallel teeth. When the insert is in position, slide holding ring onto the polyurethane insert starting, centrifugal force will expand the elastic insert to fix it tightly to the inside of the steel ring.

To disassemble, remove the ring. The insert can then be quickly and easily removed and replaced.

T Flex® Patent # 7.244,186

Customers Rely on ATRA-FLEX^® T-Series for Their Most Demanding Applications

Patented T-Flex^® absorbs extreme torsional shock and vibration while accommodating angular, parallel, and axial misalignment without generating reactionary loads, which significantly increases bearing life.

Application Range: Coupling sizes available to transmit torque loads from 60 in/lbs. to over 3.24 million in/lbs. with shaft capacities ranging from .375 to over 20.00 running from low rpm to over 18,000 rpm.

Coupling Types: Close coupled, Spacer types, Limited End Float, Slide, Floating Shaft, Flywheel, Brake Wheel, Brake Disc, and made to order engineered couplings.

How it works: T-Flex close coupled couplings consist of four parts. The Ring Hub, Flex Hub, Insert, and Drive Ring. The Ring Hub and Flex Hub are installed on the shafts with the Drive Ring fitting over the Flex Hub. After coupling alignment, the Insert is placed around the Flex Hub engaging the bottom lobes of the Insert. The Drive Ring is then fitted over the Insert engaging the top lobes of the Insert. The Drive Ring is then fastened to the Ring Hub using high strength alloy steel socket head cap screws with high collar lock washers. The coupling will now transmit torque with silent, smooth reliable, maintenance free operation. Manufacturing: T-Flex is manufactured in the USA. Standard hubs and rings are machined from solid carbon steel rounds and tubing, maintaining tight tolerances which provides excellent coupling balance. Stainless steels in grades 303, 304, and 316 are also available for corrosive environments and food applications. We also offer a low cost, FDA approved alternative to stainless steel called Nitrocarburized Process which turns carbon steel a matte black and prevents wear and corrosion. TFlex® inserts are made from durable custom compounded polyurethane that offer resistance to almost every fluid found in industry today. Using TFlex® ensures dependable, maintenance free torque transmission for your rotational equipment, and comes with product / technical support from our knowledgeable staff with over 25 years’ experience.

T Flex^® Advantages

T-Flex® uniquely combines the stability of a compression type coupling with the safety of a shear coupling. In the event of a lockup, the insert will shear, minimizing the possibility of damaging your rotational equipment.
No lubrication or routine maintenance is required.
The rugged polyurethane insert is the only spare part and can be replaced in minutes without having to move the equipment or the shaft hubs.
Standard inserts have a temperature range from -60° to 250° Fahrenheit with high temperature inserts available up to 350°.
The inserts are available in a range of hardness to meet most torsional stiffness and torque requirements, and offers very high resistance to chemicals and weather.
T-Flex® couplings are suitable for blind assembly, horizontal or vertical, reversing, and stop/start applications.
The Compact size to torque ratio with generous bore capacity allows proper sizing.
Hubs are available for use with tapered bushings, lock assemblies, shrink discs, finished bored and keyed, taper bored, and spline bored.