Elastomer Jaw Couplings TNS SDD-5

The RINGFEDER^® TNS SDD-5 coupling is a torsionally flexible, fail-safe multi-part claw coupling with standard hubs and removable intermediate part comprising the claw rings and the intermediate ring. It balances out angular, radial and axial shaft misalignments within defined limits. The coupling transfers the torque via pressure loadable, elastic buffers of synthetic rubber (Pb) or polyurethane (Vk), as a standard VkR, and are connected to each other to form an elastic intermediate ring. The elastic intermediate ring can cushion impacts and torsional vibrations; it is oil-resistant. Intermediate rings made of Perbunan are electrically conductive. The two-parted construction of both coupling halves allows radial mounting and dismounting of the intermediate part. The intermediate ring can, therefore, be replaced without having to displace the connected machines. When the intermediate part is removed, it is easily possible to check the rotational direction of the drive. The coupling is suitable for use in every direction of rotation and installation position.

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Identifier	Size	T_KN Nm	n_max 1/min	d_1kmin mm	D₂ mm	C₁ mm	L mm	L₂ mm	D_G mm	T_A Nm	Gw_ub kg
WS0710	100	130	7250	18	65	49	150	37,5	8	25	5,3
WS0712	125	250	6000	18	80	56	170	42,5	10	49	8,8
WS0714	145	400	5250	20	92	60,5	189	44	12	85	13,3
WS0717	170	630	4500	30	110	74,5	217	58	12	85	19,9
WS0720	200	1100	3750	35	135	98,5	274	82	14	135	35,3
WS0723	230	1700	3250	35	160	110	301	90	14	135	52,5
WS0726	260	2650	3000	45	180	112,5	321	88	16	210	71,5
WS0730	300	3900	2500	50	200	131,5	376	105	20	425	109,0
WS0736	360	6500	2150	55	225	172	469	142,5	24	730	179,8
WS0740	400	8900	1900	55	225	172	469	142,5	24	730	197,7

Identifier	Size	T_KN ft-lbs	n_max rpm	d_1kmin inch	D₂ inch	C₁ inch	L inch	L₂ inch	D_G mm	T_A ft-lbs	Gw_ub lbs
WS0710	100	96	7250	0.70866	2.559	1.929	5.906	1.476	8	18	11.68
WS0712	125	184	6000	0.70866	3.150	2.205	6.693	1.673	10	36	19.40
WS0714	145	295	5250	0.7874	3.622	2.382	7.441	1.732	12	63	29.32
WS0717	170	465	4500	1.1811	4.331	2.933	8.543	2.283	12	63	43.87
WS0720	200	811	3750	1.37795	5.315	3.878	10.787	3.228	14	100	77.82
WS0723	230	1254	3250	1.37795	6.299	4.331	11.850	3.543	14	100	115.74
WS0726	260	1955	3000	1.77165	7.087	4.429	12.638	3.465	16	155	157.63
WS0730	300	2877	2500	1.9685	7.874	5.177	14.803	4.134	20	313	240.30
WS0736	360	4794	2150	2.16535	8.858	6.772	18.465	5.610	24	538	396.39
WS0740	400	6564	1900	2.16535	8.858	6.772	18.465	5.610	24	538	435.85

Images & Drawings

Dimensions

Elastic intermediate ring

Electrical conductivity

Temperature

Reduction in torque shocks

Product Characteristics

RINGFEDER^® TNS SDD-5

Multi-part design coupling with standard flange hub (short), detachable claw rings. The intermediate ring can be replaced by removing the claw rings without moving a shaft.

Notes

Standard material for intermediate ring: VkR
Installed size L must be maintained without fail. Axial displacement e.g. by thermal expansions of the connected shafts, must be taken into account through allowances for value L.

General features

Torsionally flexible, compensate for angular, radial and axial shaft offset
Intermediate rings loaded in compression
Intermediate rings loaded in compression
Elastomers available in various shore hardness degrees
Suitable for temperatures from -30°C to +100°C
Outer diameter up to 400 mm
Bores up to max. 160 mm
Torques up to T_Kn = 13,350 Nm / T_Kmax = 40,000 Nm
Speeds up to n_max = 7,250 rpm

INTRODUCTION

The rotationally resilient coupling of the RINGFEDER^® TNS coupling is flexible in all directions and therefore compensates for angular, parallel and axial shaft misalignments of the connected machines. Misalignments can be caused, for example, by inaccurate assembly, heat movements or settling phenomena.

Elastic intermediate ring

With the RINGFEDER^®-TNS coupling, the torque is transmitted via a compressed elastic intermediate ring. The elastic intermediate ring absorbs shocks and torsional vibrations, is resistant to oil and largely insensitive to temperature.
The strength of different elastomer materials is indicated by their Shore hardness. Elastomers of different strengths are colour-coded for identification. Further details concerning the strength and load capacity are available on request in the technical data sheet.

Elastomer Materials

The elastic intermediate rings of RINGFEDER^® TNS are made of butadiene-nitril-rubber (Pb82) or polyurethane (VkR, Vk60D). The black buffer (Pb82) are normally electrically conductive and therefore prevent undesirable electrostatic charges. The red (VkR) and white (Vk60D) rings ensure electrical insulation between connected machines as long as there are no other electrically conductive connections. The resilience of the individual elastomer materials is designated by their Shore hardness. From these values an indirect conclusion can be drawn with respect to the torques the coupling is able to transmit and its spring stiffness. For further details, please see the technical data sheet.

Avoiding Torsional Vibration

By virtue of the rotational resilience of the coupling, dangerous torsional vibrations from the operational range of plant machinery can be transferred to rotational speed ranges in which no negative effects are to be expected. The elastic intermediate rings possess a high material damping capability which makes it possible for the couplings to keep the resonance enhancements within limits when passing through dangerous speed ranges, thereby protecting the coupled machines against damage. The couplings also mitigate torque shocks and cause a vibrating system that has been excited by an impact to come to rest very quickly due to the material damping qualities. The conduction of structure-borne noise is prevented.

Environmental condition

The employed elastomer materials operate reliably in ambient temperature ranges of –30° to +100°C. Please contact RINGFEDER POWER TRANSMISSION if higher ambient temperatures are involved. The influence of the temperature on the coupling size selection is explained in more detail in the below-mentioned design directives. It is only allowed to operate the coupling in normal industrial air. Aggressive media may attack the coupling components, bolts and elastic elements, and, therefore, present a danger to the operational safety of the coupling. The coupling can be declared compliant with the European Directive 2014/34/EU (ATEX). Please contact RINGFEDER POWER TRANSMISSION regarding the declaration of conformity according to 2014/34/EU and the effects of aggressive ambient media.