Gear Couplings TNZ ZCH

Standard hubs with one-piece casing

The RINGFEDER^® TNZ ZCH, comprising one-piece casing with O-ring supports on both sides and two hubs on the TNZ ZCA. Combinations available with long hubs (ZCHU and ZCHUU).

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TNZ ZCH

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Size	Identifier	T_KN Nm	n_max 1/min	d_1kmin mm	d_1kmax mm	D₁ mm	D₂ mm	L mm	Gw_sb kg
69	XC0106	1750	6000	12	50	98	69	89	4,6
85	XC0108	2750	4600	18	60	115	85	103	7,0
107	XC0110	5500	4200	28	75	145	107	127	13,3
133	XC0113	8500	4000	40	95	176	133	157	24,5
152	XC0115	13500	3850	50	110	196	152	185	33,8
179	XC0117	22000	3700	60	130	225	179	216	50,5
209	XC0120	35000	3200	70	155	256	209	246	75,9
234	XC0123	43000	2900	85	175	286	234	278	104,7
254	XC0125	68000	2600	95	190	310	254	308	131,7
279	XC0127	82000	2300	110	210	345	279	358	185,4
305	XC0130	150000	2100	120	230	375	305	388	236,6
355	XC0135	195000	1800	130	270	430	355	450	368,0

Size	Identifier	T_KN ft-lbs	n_max rpm	d_1kmin inch	d_1kmax inch	D₁ inch	D₂ inch	L inch	Gw_sb lbs
69	XC0106	1291	6000	0.472	1.969	3.858	2.717	3.504	10.1
85	XC0108	2028	4600	0.709	2.362	4.528	3.346	4.055	15.4
107	XC0110	4057	4200	1.102	2.953	5.709	4.213	5.000	29.2
133	XC0113	6269	4000	1.575	3.740	6.929	5.236	6.181	53.9
152	XC0115	9957	3850	1.969	4.331	7.717	5.984	7.283	74.4
179	XC0117	16227	3700	2.362	5.118	8.858	7.047	8.504	111.3
209	XC0120	25815	3200	2.756	6.102	10.079	8.228	9.685	167.3
234	XC0123	31716	2900	3.346	6.890	11.260	9.213	10.945	230.8
254	XC0125	50155	2600	3.740	7.480	12.205	10.000	12.126	290.3
279	XC0127	60481	2300	4.331	8.268	13.583	10.984	14.094	408.7
305	XC0130	110636	2100	4.724	9.055	14.764	12.008	15.276	521.6
355	XC0135	143826	1800	5.118	10.630	16.929	13.976	17.717	811.3

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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.).