Tyre Couplings RLU

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Key Characteristics of the Tyre Couplings RLU

The RINGFEDER RLU tyre coupling is a torsion-soft, flexible shaft-to-shaft connection designed for industrial applications where damping of shocks, vibrations and mis‐alignments is required. It also known as "Khớp nối bánh xe RLU".

Ringfeder RLU Couplings have outstanding features:

- The split tyre profile is connected to a metal holder and is mounted radially on the hubs - this enables quick and easy assembly and disassembly without having to move adjacent machine components.

- The RLU coupling transmits the torque via shear in the flexible element and is ideal for compensating angular, parallel and axial misalignments.

- The polyurethane tyre offers high strength, durability and resistance to fatigue.

- The coupling can optionally be fitted with taper-lock bushes. Different hub arrangements enable variable shaft distances.

Tyre Couplings of the RINGFEDER^® RLU series are two main types:

- Type BWB: Standard design with straight bores and keyways, available with either Standard Hubs (BWB) or Reversed Hubs (RWR).
- Type BSB: Design with Spacer, available with either Standard Hubs (BSB) or Reversed Hubs (RSR).

Product Specifications of Tyre Couplings of the RINGFEDER^® RLU series

Torsion-Soft Shaft-Shaft Connection with Split, Radially Mounted Elastic Tyre
- 13 Sizes
- Max. Bore Diameter d₁/d₂: 28-171 mm (1.102-6.732 inch)
- Outer Diameter D₁: 90-533 mm (3.543-20.984 inch)
- Total Length L_x: 84-375 mm (3.307-14.764 inch)
- Torque T_KN: 22-9,600 Nm (16.23-7,080.6 ft·lb)

Tyre Couplings RLU Catalogue	RLU Installation Introduction

Size	T_KN	n_max	Dimenssions [mm]					Gw
RLU BWB	Nm	1/min	Pilot Bore Size	Max. Bore d1/d2	D1	L	L2	[kg]
2M	22	7500	13	28	90	94	84	0.65
3M	43	7500	13	36	103	122	84	1
4M	63	7500	13	42	117	122	84	1.8
5M	110	7500	13	48	138	147	96	3
10M	181	7500	13	55	163	147	96	4.4
20M	260	6600	21	60	185	165	113	5.65
30M	414	5800	21	78	211	185	128	11.3
40M	628	5000	26	95	245	201	134	16
50M	875	4200	26	105	283	231	151	24.8
60M	1432	3800	31	115	319	261	172	35.1
70M	2531	3600	31	123	357	279	188	40.4
80M	4460	2000	31	155	406	377	245	77
100M	9600	1900	48	171	533	375	324	95

Size	T_KN	n_max	Dimenssions [mm]					Gw
RLU BSB	Nm	1/min	Pilot Bore Size	Max. Bore d1/d2	D1	L	L2	[kg]
2M	22	7500	13	28	90	148	138	1
3M	43	7500	13	36	103	176, 216	144, 184	1.3
4M	63	7500	13	42	117	176, 216	138, 178	2
5M	110	7500	13	48	138	188, 228	137, 177	3.5
10M	181	7500	13	55	163	188, 228	136.8, 176.8	4.8
20M	260	6600	21	60	185	240, 280	190, 230	6.6
30M	414	5800	21	78	211	256, 296	199, 239	11.7
40M	628	5000	26	95	245	266, 306	200, 240	19.1
50M	875	4200	26	105	283	280, 320	202, 242	28.2
60M	1432	3800	31	115	319	344, 414	255, 325	36.3
70M	2531	3600	31	123	357	350, 420	259, 329	41.6
80M	4460	1900	31	155	406	408, 478	279, 349	89

Applications of Tyre Couplings RLU

The RLU tyre coupling is suitable for a broad spectrum of industrial sectors, including:
- Pumps, fans, compressors — where shock loads or vibration occur.

- Conveyor systems with shaft distances that may fluctuate or require maintenance access.
- Cement, steel, food and energy industries — described by Ringfeder in their product overview.

Why Choose Tyre Couplings RLU?

Compared to rigid or less flexible couplings (e.g., steel disc couplings, jaw couplings), RLU tire couplings offer:
- Better shock/vibration damping and equipment protection.
- Split tire design allows tire changes without completely disassembling the drivetrain.
- RLU can handle angular, parallel, and axial displacement better than many rigid couplings.
- Long-term cost savings: less wear, less failure, easier maintenance.

Dai Hong Phat Corp specializes in the supply of genuine Ringfeder Tyre Couplings RLU throughout Vietnam.

Our products are brand new, complete with certificates and clear origins.
With 15 years of industry experience, Dai Hong Phat Corp is committed to providing high-quality Ringfeder RLU coupling at competitive prices. We maintain a substantial inventory to ensure the availability of goods in large quantities.

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