Gear Couplings TNZ ZCAUU / TNZ ZCBUU

Extended universal hubs

Unlike the model TNZ ZCA, the RINGFEDER^® TNZ ZCAUU has two elongated hubs the length of which can be adapted to the plant requirements.

Compared to the TNZ ZCAUU, the coupling model RINGFEDER^® TNZ ZCBUU is equipped with an O-ring carrier which facilitates installation by changing the mounting sequence. For mounting the coupling, unscrew the cover and place it on the shaft. Mount the hub onto the shaft, slide the sleeve onto the hub and fasten the O-ring carrier to the sleeve. This way of mounting is advantageous when large couplings are involved. Like the model ZCAUU, the ZCBUU has two elongated hubs the length of which can be adapted to the plant requirements

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Size	Identifier ZCA	T_KN Nm	n_max 1/min	d_1kmin mm	d_1kmax mm	D₁ mm	D₆ mm	L mm	Gw_sb kg
69	XC2306	1750	6000	12	50	111	81,5	213	7,5
85	XC2308	2750	4600	18	60	152	103,5	233	14,0
107	XC2310	5500	4200	28	75	178	127,5	263	23,1
133	XC2313	8500	4000	40	95	213	156	305	39,8
152	XC2315	13500	3850	50	110	240	181	345	57,1
179	XC2317	22000	3700	60	130	280	209	376	86,0
209	XC2320	35000	3200	70	155	318	245,5	436	133,1
234	XC2323	43000	2900	85	175	346	274	498	179,1
254	XC2325	68000	2600	95	190	389	307	598	263,7
279	XC2327	82000	2300	110	210	425	334,5	608	318,1
305	XC2330	150000	2100	120	230	457	366	618	374,4
355	XC2335	195000	1800	130	270	527	423	630	531,4

Size	Identifier ZCA	T_KN ft-lbs	n_max rpm	d_1kmin inch	d_1kmax inch	D₁ inch	D₆ inch	L inch	Gw_sb lbs
69	XC2306	1291	6000	0.472	1.969	4.370	3.209	8.386	16.6
85	XC2308	2028	4600	0.709	2.362	5.984	4.075	9.173	30.9
107	XC2310	4057	4200	1.102	2.953	7.008	5.020	10.354	50.9
133	XC2313	6269	4000	1.575	3.740	8.386	6.142	12.008	87.7
152	XC2315	9957	3850	1.969	4.331	9.449	7.126	13.583	125.9
179	XC2317	16227	3700	2.362	5.118	11.024	8.228	14.803	189.6
209	XC2320	25815	3200	2.756	6.102	12.520	9.665	17.165	293.4
234	XC2323	31716	2900	3.346	6.890	13.622	10.787	19.606	394.8
254	XC2325	50155	2600	3.740	7.480	15.315	12.087	23.543	581.4
279	XC2327	60481	2300	4.331	8.268	16.732	13.169	23.937	701.3
305	XC2330	110636	2100	4.724	9.055	17.992	14.409	24.331	825.4
355	XC2335	143826	1800	5.118	10.630	20.748	16.654	24.803	1171.5

Images & Drawings

Product Characteristics

General features

Torsionally rigid gear coupling made of high-quality steel
Very compact design results in a high-power density
Compensates for angular, radial and axial shaft offset
Suitable for use in temperatures up to +120 °C if special seals are used
Available with split sleeve (ZCA / ZCB - ZCA model range also available in ZCB design) and single-piece sleeve (ZCH)
The elastic O-ring can be replaced without having to move the coupled machines
Bores up to 270 mm
Torques up to T_Kn = 195,000 Nm / T_Kmax = 390,000 Nm
Speeds up to n_max = 6,000 rpm

General description

The RINGFEDER^® TNZ coupling is a torsionally rigid twin cardanic gear coupling.

Toothing

The coupling housings have a straight internal toothing whilst the hubs have an external toothing with a chased variable radius. As a result, the hubs can move spatially within the housing and thus compensate angular, radial and axial shaft misalignment of the adjoined shaft ends within specified tolerances. Depending on coupling type and size, the standard toothing permits an angular misalignment of up to 0.5 degrees per toothing-plane and an axial movement of several millimetres. The max. possible radial shaft displacement is dependent on the distance between the two toothing planes. Other toothing geometries can be used for further specific applications.

Materials

High-grade tooth profiles and grease with ultra high-pressure additives guarantee low-restoring forces and a long serviceable life. The material used is forged steel with an apparent yielding point of at least 335 N/mm². Special materials can be used for further specific applications. Sealing is carried out using O-rings of synthetic rubber. The housings are centred and held together by fit-bolts and self-locking nuts.

Temperature

The use of special seals permits the temperature limit to be raised to 120 °C.

Balance

At peripheral speeds upwards of 30 m/s it is advisable to dynamically balance the coupling.

Special applications

If greater misalignments are anticipated at higher speeds and torques, an examination is necessary, performed with the assistance of a special computing programme. This is independent of the determined size. The value T_Kmax may not be exceeded in any state of operation (start-up, electrical short circuit, blocking, etc.).