Flexible couplings N-BIPEX series

Flexible couplings, N-BIPEX

N-BIPEX couplings are torsionally flexible and are outstanding for their particularly compact design and low weight.

N-BIPEX couplings are used in many areas of mechanical engineering.

Their main area of use is in electric motor drives which are well aligned and have uniform torque loads, such as in hydraulic applications and in combinations with geared motors.

Область применения

Cam rings, 92 ShoreA, 95 ShoreA, 64 ShoreD

The N-BIPEX coupling is available as a catalog standard in 10 sizes with rated torques of between 12 Nm and 4650 Nm and is made of high-grade spheroidal graphite cast iron.

The extremely high-performance cam ring materials are available from stock in three different Shore hardnesses with the following colors:

92 ShoreA – red
95 ShoreA – gren
64 ShoreD – blue

Cam rings, 92 ShoreA

An additional size marking has been provided on the outer surface of the cam ring to be able to determine the size of the N-BIPEX even when it is in the assembled state without having to use any additional aids.

The coupling is suitable for use at ambient temperatures between -50 °C and +100 °C without any restrictions on the rated torque as a result of temperature factors.

Coupling suitable for use in potentially explosive atmospheres.
Complies with the current ATEX Directive for:

	II 2 G IIB T4/T5/T6 -50 °C ≤ T_a ≤ +100 °C/+70 °C/+55 °C
	II 2D T 120°C -50 °C ≤ Ta ≤ +90 °C
	I M2

Дизайн

The N-BIPEX coupling of type BWN comprises two identical hub parts connected by a cam ring of elastomer material.

The hubs are connected to the respective shafts via finished bores with parallel keyway connection.

N-BIPEX couplings are positive-locking and torsionally flexible thanks to the thermoplastic polyurethane cam ring.

Coupling materials

Hubs

EN-GJS-400-15

Cam ring

TPU 92 ShoreA -50 °C to +100 °C without any restrictions
TPU 95 ShoreA -50 °C to +100 °C without any restrictions
TPU 64 ShoreD -50 °C to +100 °C without any restrictions

N-BIPEX, Type BWN, flexible couplings

Size	Undrilled	Preferred bores from stock with cylindrical finished bores ∅ in mm H7, parallel keyway according to DIN 6885-1 JS9 and set screw
		10	11	12	14	15	16	17	18	19	20	22	24	25	28	30	32	35	38	40	42	45	48	50	55	60	65	70	75	80	85	90	100	110	120
19	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓
24	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓
28	✓				✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓
38	✓						✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓
42	✓										✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓
48	✓												✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓
55	✓													✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓
65	✓																✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓
75	✓																	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓
90	✓																					✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓

✓ Preferred bores

Функции

The torque is transmitted to the hub at the drive end via the shaft-hub connection, which is mostly designed as a keyway connection, and is transmitted to the hub on the output side via the cam ring. This hub then further transmits the torque to the driven machine or a gear unit placed in between. The special cam design helps to keep the compression-loaded cam ring elements in their defined position under all operating conditions and to keep them evenly loaded. This results in a long lifetime of the flexible elements. A long lifetime is also guaranteed by the hub parts which ensure maximum operational reliability even under harsh operating conditions.

Особенности

N-BIPEX couplings are suitable for horizontal, vertical and freely selectable mounting positions. They are able to absorb axial, radial and angular misalignment.

N-BIPEX couplings consist of two identical hub parts which can be arranged as required on the shaft extensions to be connected. N-BIPEX couplings transmit the torque positively and are thus fail-safe. The curved design of the cast cams ensures that the N-BIPEX couplings have a perfect pressure distribution and this increases the elastomer lifetime.

The flexible cam rings responsible for torque transmission and misalignment compensation are available in different Shore hardnesses. As a result of the good damping capability and by selecting the suitable stiffness, torque shock loads can thus be absorbed and the torsional vibration behavior of the drive can be positively influenced. Different cam ring versions and ready-to-install hub parts are available from stock.

Технические данные

Cam rings

Cam rings of polyurethane 92 ShoreA (standard)

Size	Rated torque	Maximum torque	Fatigue torque	Maximum speed	Damping coefficient ψ	Torsional stiffness at 50 % capacity utilization	Permitted shaft misalignment at ¹⁾
				V ≤ 45 m/s			< 10 Hz	n = 1500 rpm
	T_KN	T_Kmax	T_KW	n_max		C_Tdyn 50 %	ΔK_a	ΔK_r	ΔK_w
	Nm	Nm	Nm	rpm		Nm/rad	mm	mm	degrees
19	12	36	2	19500	1.4	530	0.30	0.17	0.5
24	45	135	7	14500	1.4	1790	0.40	0.23	0.5
28	95	285	14	12500	1.4	3060	0.50	0.25	0.5
38	190	570	29	10000	1.4	6500	0.60	0.29	0.5
42	265	795	40	8500	1.4	8200	0.70	0.34	0.5
48	330	990	50	7500	1.4	10000	0.80	0.38	0.5
55	460	1380	70	6500	1.4	14500	0.90	0.40	0.5
65	670	2010	100	6000	1.4	25600	1.00	0.45	0.5
75	1400	4200	210	5000	1.4	37400	1.20	0.52	0.5
90	2500	7500	375	4000	1.4	62700	1.40	0.60	0.5

1) DThe maximum speed must be observed. Please refer to the Operating Instructions for further information on permitted shaft misalignment.

Cam rings of polyurethane 95 ShoreA (Ordering option -Z and order code K01)

Size	Rated torque	Maximum torque	Fatigue torque	Maximum speed	Damping coefficient ψ	Torsional stiffness at 50 % capacity utilization	Permitted shaft misalignment at ¹⁾
				V ≤ 45 m/s			< 10 Hz	n = 1500 rpm
	T_KN	T_Kmax	T_KW	n_max		C_Tdyn 50 %	ΔK_a	ΔK_r	ΔK_w
	Nm	Nm	Nm	rpm		Nm/rad	mm	mm	degrees
19	18	54	3	19500	1.4	1130	0.27	0.15	0.4
24	65	195	10	14500	1.4	4240	0.36	0.21	0.4
28	160	480	25	12500	1.4	8050	0.45	0.23	0.4
38	325	975	50	10000	1.4	14100	0.54	0.26	0.4
42	450	1350	70	8500	1.4	16200	0.63	0.31	0.4
48	550	1650	85	7500	1.4	23300	0.72	0.34	0.4
55	700	2100	105	6500	1.4	28500	0.81	0.36	0.4
65	1000	3000	150	6000	1.4	35000	0.90	0.41	0.4
75	2000	6000	300	5000	1.4	66300	1.08	0.47	0.4
90	3700	11100	555	4000	1.4	105000	1.26	0.54	0.4

1) The maximum speed must be observed. Please refer to the Operating Instructions for further information on permitted shaft misalignment.

Cam rings of polyurethane 64 ShoreD (Ordering option -Z and order code K04)

Size	Rated torque	Maximum torque	Fatigue torque	Maximum speed	Damping coefficient ψ	Torsional stiffness at 50 % capacity utilization	Permitted shaft misalignment at ¹⁾
				V ≤ 45 m/s			< 10 Hz	n = 1500 rpm
	T_KN	T_Kmax	T_KW	n_max		C_Tdyn 50 %	ΔK_a	ΔK_r	ΔK_w
	Nm	Nm	Nm	rpm		Nm/rad	mm	mm	degrees
19	25	75	5	19500	1.4	2010	0.24	0.14	0.3
24	90	270	15	14500	1.4	7680	0.32	0.18	0.3
28	200	600	30	12500	1.4	12200	0.40	0.20	0.3
38	405	1215	60	10000	1.4	25100	0.48	0.23	0.3
42	560	1680	84	8500	1.4	32000	0.56	0.27	0.3
48	700	2100	105	7500	1.4	41200	0.64	0.30	0.3
55	925	2775	140	6500	1.4	52600	0.72	0.32	0.3
65	1200	3600	180	6000	1.4	86700	0.80	0.36	0.3
75	2600	7800	390	5000	1.4	143000	0.96	0.42	0.3
90	4650	13950	700	4000	1.4	234000	1.12	0.48	0.3

1) The maximum speed must be observed. Please refer to the Operating Instructions for further information on permitted shaft misalignment.

Torsional stiffness and damping

The values stated in the above table apply to a capacity utilization of 50 %, an excitation amplitude of 10 % TKN with frequency 10 Hz and an ambient temperature of 20 °C. The dynamic torsional stiffness (C_Tdyn) is load-dependent and increases in proportion to capacity utilization. The following table shows the correction factors for different nominal load.

C_Tdyn = C_{Tdyn 50 %} • FKC

	Capacity utilization T_N / T_KN
	20 %	40 %	50 %	60 %	70 %	80 %	100 %
Correction factor FKC 92/95 ShoreA and 64 ShoreD	0.56	0.85	1.00	1.17	1.35	1.53	1.92

Furthermore, torsional stiffness and damping depend on the ambient temperature, the frequency and the amplitude of the torsional vibration excitation. More precise torsional stiffness and damping parameters on request.

With flexible couplings the manufacturing process of the rubber elements and their aging primarily influence the stiffness value C_Tdyn. For this reason calculation must be made with a tolerance for the dynamic stiffness of ±20 %. The specified damping coefficient ψ is a minimum value with the result that the damping performance of the coupling corresponds at least to the specified value.

Permitted shaft misalignment

The permitted shaft misalignment depends on the operating speed. As the speed increases, lower shaft misalignment values are permitted. The following table shows the correction factors for different speeds. The maximum speed depending on the respective coupling size and type must be observed!

ΔK_zul = ΔK₁₅₀₀ • FKV

	Speed in rpm
	500	1000	1500	3000
Correction factor FKV	1.20	1.10	1.00	0.7

The axial misalignment may occur dynamically at frequencies up to 10 Hz. For fitting, the maximum gap dimension of S2 max. = S2 + ΔS2 and the minimum gap dimension of S2 min. = S2 - ΔS2 are permitted.

The shaft misalignments ΔK_a, ΔK_r und ΔK_w may occur simultaneously (see under "Couplings"/"Technical Informations"/"Shaf misalignment").

Assignment of N-BIPEX sizes to output P_M of IEC standard motors

The assignment applies for an service factor of 1.25 and the use of a standard cam ring (92 ShoreA).

Three-phase motor	Motor		N-BIPEX coupling	Motor		N-BIPEX coupling	Motor		N-BIPEX coupling	Motor		N-BIPEX coupling	DE shaft end D × E acc. to IEC
Size	Output at ≈ 3000 rpm		Size	Output at ≈ 1500 rpm		Size	Output at ≈ 1000 rpm		Size	Output at ≈ 750 rpm		Size	DE shaft end D × E acc. to IEC
	P_M	T		P_M	T		P_M	T		P_M	T		D	E
	kW	Nm		kW	Nm		kW	Nm		kW	Nm		mm	mm
80	0.75	2.5	19	0.55	3.7	19	0.37	3.9	19	0.18	2.5	19	19	40
80	1.1	3.7	19	0.75	5.1	19	0.55	5.8	19	0.25	3.5	19	19	40
90S	1.5	5.5	19	1.1	7.5	19	0.75	8	19	0.37	5.3	19	19	40
90S	1.5	5.5	19	1.1	7.5	19	0.75	8	19	0.37	5.3	19	24	50
90L	2.2	7.4	19	1.5	10	24	1.1	12	24	0.55	7.9	24	19	40
90L	2.2	7.4	19	1.5	10	24	1.1	12	24	0.55	7.9	24	24	50
100L	3	9.8	24	2.2	15	24	1.5	15	24	0.75	11	24	28	60
100L	3	9.8	24	3	20	24	1.5	15	24	1.1	16	24	28	60
112M	4	13	24	4	27	24	2.2	22	24	1.5	21	24	28	60
132S	5.5	18	28	5.5	36	28	3	30	28	2.2	30	28	38	80
132S	7.5	25	28	5.5	36	28	3	30	28	2.2	30	28	38	80
132M				7.5	49	28	4	40	28	3	40	28	38	80
132M				7.5	49	28	5.5	55	28	3	40	28	38	80
160M	11	36	38	11	72	38	7.5	75	38	4	54	38	42	110
160M	15	49	38	11	72	38	7.5	75	38	5.5	74	38	42	110
160L	18.5	60	38	15	98	38	11	109	38	7.5	100	38	42	110
180M	22	71	38	18.5	121	38							48	110
180L				22	144	38	15	148	42	11	145	42	48	110
200L	30	97	42	30	196	42	18.5	181	42	15	198	42	55	110
200L	37	120	42	30	196	42	22	215	42	15	198	42	55	110
225S				37	240	48				18.5	244	48	60	140
225M	45	145	42										55	110
225M				45	292	55	30	293	55	22	290	55	60	140
250M	55	177	48										60	140
250M				55	356	55	37	361	55	30	392	65	65	140
280S	75	241	55										65	140
280S				75	484	65	45	438	65	37	483	65	75	140
280M	90	289	55										65	140
280M				90	581	75	55	535	75	45	587	75	75	140
315S	110	353	55										65	140
315S				110	707	75	75	727	75	55	712	75	80	170
315M	132	423	65										65	140
315M				132	849	75	90	873	75	75	971	75	80	170
315L	160	513	65										65	140
	200	641	75										65	140
				160	1030	75	110	1070	75	90	1170	90	80	170
				200	1290	90	132	1280	90	110	1420	90	80	170
							160	1550	90	132	1710	90	85	170
315	250	802	75										65	140
	315	1010	90										65	140
				250	1600	90	200	1930	90				85	170
355	355	1140	90										75	140
	400	1280	90										75	140
	500	1600	90										75	140
400	560	1790	90										80	170

Size	Undrilled	Preferred bores from stock with cylindrical finished bores ∅ in mm H7, parallel keyway according to DIN 6885-1 JS9 and set screw
		10	11	12	14	15	16	17	18	19	20	22	24	25	28	30	32	35	38	40	42	45	48	50	55	60	65	70	75	80	85	90	100	110	120
19	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓
24	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓
28	✓				✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓
38	✓						✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓
42	✓										✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓
48	✓												✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓
55	✓													✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓
65	✓																✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓
75	✓																	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓
90	✓																					✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓

Size	Undrilled	Preferred bores from stock with cylindrical finished bores ∅ in mm H7, parallel keyway according to DIN 6885-1 JS9 and set screw
		10	11	12	14	15	16	17	18	19	20	22	24	25	28	30	32	35	38	40	42	45	48	50	55	60	65	70	75	80	85	90	100	110	120
19	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓
24	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓
28	✓				✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓
38	✓						✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓
42	✓										✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓
48	✓												✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓
55	✓													✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓
65	✓																✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓
75	✓																	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓
90	✓																					✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓	✓