Suprabakti supplies Locking Assemblies manufactured by German company, Ringfeder Power Transmission GmbH—A global leader in specialized markets for dampening and drive technologies. RINGFEDER® Locking Assemblies, incorporating double-tapered thrust rings with self-releasing tapers, ensures quick assembly, disassembly, and maintenance. Free operation and backlash-free power transmission

The assemblies offer superb friction-locked shaft-hub connections that are ideal for properly fastening plenty of hubs, such as chain sprockets, running wheels, and toothed gears. Technicians can install them between the shaft and hub to create a friction-fit press connection by tightening the clamping screws, unlike external clamping connections.

This design makes it possible to transmit high torques, axial, radial, and bending loads with reliability. RINGFEDER® Locking Assemblies are excellent substitutes for conventional connections owing to their great resistance to alternating torsion and concentricity.

Locking Assembly Self-centering

Self-centering RINGFEDER® Locking Assemblies ensure excellent concentricity, with a maximum error of only 0.004 mm. Technicians mostly use them in gear wheel mountings within rotary pumps and high-precision machine tools, making them perfect for precise applications.

Locking Assembly without Axial Displacement

RINGFEDER® Locking Assemblies, without hub axial displacement during assembly, are used to avoid any negative impact on connection functionality. Mainly used in machine tools, helical gear wheels, rotary table drives, pumps, and brake disc mountings, they ensure optimal performance and stability in these applications.

Locking Assembly With Low Surface Pressures

RINGFEDER® Locking Assemblies with low surface pressures reduce tension in connected parts and are suited for thin-walled grey cast iron or aluminum hubs. Thin-walled levers and aluminum timing belt pulleys are two common uses.

RINGFEDER® Locking Assembly

RINGFEDER® Locking Assemblies offer freedom of movement and fatigue resistance. Their quick and easy assembly requires only a few screws, ensuring precise alignment between the shaft and hub without the need for adjustment. Disassembly is straightforward, facilitated by extraction threads, eliminating the need for additional tools or aids.

RINGFEDER® Transmissible Torques T [Nm] Shaft diameter [mm] self-centering without axial displacement with low surface pressure
RfN 7003 355 – 512 635 19 – 400 ✓
RfN 7004 530 – 63 903 19 – 180 ✓
RfN 7005 649 – 1 760 000 25 – 600 ✓
RfN 7006 270 – 375 945 19 – 400 ✓ ✓
RfN 7007 320 – 48 800 19 – 200 ✓ ✓
RfN 7012 306 – 2 352 018 19 – 1000 ✓
RfN 7012.2 12 074 – 1 631 741 130 – 800 ✓
RfN 7013.0 3 285 – 28 500 19 – 150 ✓
RfN 7013.1 285 – 28 500 19 – 150 ✓
RfN 7014 4 130 – 245 000 60 – 300 ✓
RfN 7015.0 14 244 – 2 427 520 100 – 800 ✓
RfN 7015.1 6 575 – 903 696 100 – 800 ✓ ✓
RfN 7061 6 – 1 900 6 – 50 ✓ ✓
RfN 7110 30 – 23 700 8 – 130 ✓ ✓ ✓
RfN 7515 4 299 – 1 300 152 60 – 640 ✓

RINGFEDER® Stainless Steel Locking Assemblies

RINGFEDER® stainless steel products can be applied when machinery, components, and systems must be thoroughly cleaned and when severe resistance needs to be met. This is achieved through the use of stainless steel, high-strength special screws.

RINGFEDER® Transmissible torques T [Nm] Shaft diameter d [mm] self-centering without axial displacement with low surface pressure
RfN 7012 stainless steel 252 – 24 046 19 – 150 ✓
RfN 7013.1 stainless steel 199 – 19 950 19 – 150 ✓ ✓
RfN 7061 stainless steel 3 – 1 472 6 – 50 ✓ ✓
RfN 7110 stainless steel 16 – 1 883 8 – 50 ✓ ✓ ✓

RINGFEDER® Bending Loads Locking Assemblies

Belt drums pose a significant challenge to Locking Assemblies due to the extreme bending moments they endure. Absorbing these loads reliably demands the highest level of engineering expertise. RINGFEDER® sets the standard for quality Locking Assemblies, exemplified by the RfN 7012, RfN 7012.2, RfN 7015.0, RfN 7015.1, and RfN 7515 products.

RINGFEDER® Transmissible torques T [Nm] Shaft diameter d [mm] self-centering without axial displacement with low surface pressure
RfN 7012 Bending Loads 1 777 – 1 960 015 50 – 100 ✓
RfN 7012.2 Bending Loads 10 409 – 1 359 784 100 – 800 ✓
RfN 7015.0 Bending Loads 11 297 – 2 184 768 100 – 800 ✓ ✓
RfN 7015.1 Bending Loads 6 575 – 1 054 312 100 – 800 ✓ ✓
RfN 7515 Bending Loads 4 299 – 1 300 152 60 – 640 ✓
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