PLAIN BEARING TECHNOLOGY

END FLANGE MOUNTED BEARING

ZF

1

THE ZOLLERN GROUP

ZOLLERN GMBH & CO. KG IS A COMPANY WITH WORLDWIDE OPERATIONS, EMPLOYING OVER 3000 EMPLOYEES IN THE BUSINESS FIELDS OF TRANSMISSION TECHNOLOGY (AUTOMATION, GEAR BOXES AND WINCHES), PLAIN BEARING TECHNOLOGY, MACHINE COMPONENTS, FOUNDRY TECHNOLOGY AND STEEL PROFILES.

PLAIN BEARING TYPE Z

DESCRIPTION OF THE DESIGN ZF

The Zollern type ZF horizontal bearing is designed according to DIN 31 693 norm specifications for a wide range of heavy duty applications (electrical machines, turbines and test rigs). The modular system applies for the different types of bearings (pedestal, end flange and centre flange), i.e. the combination of different modules of this modular system is always possible. This has resulted in simple assembly and elimination of mistakes during installation, commissioning and maintenance procedures due to the positioning of screws and pins.

their positions can be exchanged by reversing these parts. The housing top half is provided with a sight glass to permit the loose oil ring to be viewed. Bearing vibration detectors angled at 45 each side of vertical at the top half can be easily fitted by small amendments of the housing if required. Bearing shells The shell is supplied in halves and spherically seated in the housing ensuring easy self-alignment during assembly. The material is low carbon steel lined with high tin based white metal. This construction allows easy assembly and long life cycle. Bearing shells with plain cylindrical bore and loose oil ring are used in most cases, but other shapes of bore are possible. Optional water coolers are available and the bearing can be connected to an external oil system. Where the specific load on start-up is too high, or for very slow speed applications a hydrostatic jacking system can be incorporated. Zollern will give recommendations for the oil supply pressure and the required flow rate. Bearing shells can be provided without thrust capability, or with either plain white metal lined shoulders (small, temporary thrust loads) with oil grooves, or taper land faces (medium thrust loads) for one or both senses of rotation depending on the level of the thrust load. The bearing shells can be are equipped with tilting thrust pads for highest thrust capacity.

Housing

The bearing housings are finned and manufactured from gray cast iron EN-GJL-300 (GG 30) giving high strength and best heat dissipation. Under request, they can be supplied also in modular cast iron EN-GJS-400-18 (formerly GGG 40.3) which is recommended to be used when ambient temperature reader -25C or lower. The spherical seat in the housing ensures easy alignment during assembly and the loads are steady induced to the lower part of the housing. Therefore these bearings are designed for highest stress. Thread holes for the fitting of thermo sensors in the journal bush and oil sump as well as for oil inlet and outlet pipes are provided on both sides of the housings as a standard. Water cooling tubes and vibration probes can be easily fitted by small amendments of the housings. Under request, ZF housing can be provided with thread holes to accomplish all 541 and 546 requirements for API norms. The oil sight glass is only available on one side of the housing. The opposite side will be supplied plugged and may be used as oil outlet. If need,

2

Oil supply Fully self-contained lubrication is achieved from a loose oil ring. Alternatively, where bearings are lubricated by an external oil circulation system, this loose oil ring can be used to permit emergency shutdown without damage in case an oil system failure occurs in this case the oil level in the housing is maintained by the weir which is located in the oil outlet pipe. Z-bearings can be used for marine applications by using an oil ring guide to assure proper lubrication if extreme vessel motions occur.

Electrical insulation To prevent stray currents conducted by the shaft, Z-bearings can be supplied electrically insulated as an option. In this case, the spherical seat of the housing is coated with a wear-resistant and temperature-resistant synthetic material. Under request, a grounding wire is provided to short out this insulation, passing through a threaded hole (M12x1.5) in the housing.

Selection of oil It is recommended that any branded mineral oil (preferably inhibited against foaming, ageing and oxidation) is used as the lubricant. The viscosity for every application is checked by the Zollern bearing design computer program. The output result is provided with every quotation.

Temperature control Provisions for the fitting of thermo sensors in the journal bush and oil sump are provided as standard. The type of sensor is used depends on the type required by the readout equipment used (direct reading, centralized control system, recording instrument, etc.). It is possible to provide two different sensors.

Sealing The seals are selected for the different operation conditions environments and for the requested protection level. The standard arrangement is the floating labyrinth seal (IP 44) made of high heat resistant, fiber-reinforced synthetic material. Bearings for high oil throughput are equipped with adjustable rigid seals (IP 44) made of aluminum alloy. Both types of seals can be equipped with bolt-on baffles (IP 55) or dust flingers (IP 54) if the bearing is operating in a dusty or a wet environment or if rotating parts (clutches, couplings, fans etc.) are fitted close to the bearing. Special seals offering higher protection, or pressurized seals etc. can be supplied for special applications upon request. An end cover is used if the non-drive end shaft remains inside the bearing housing.

Machine Seal ZF bearings should be used with an additional machine seal to avoid interference from inside the machine where, negative or positive pressures occur near the internal floating seals. This machine seal is fitted to the inside of the machine housing, creating a chamber next to the bearing housing. This chamber is connected to atmosphere for pressure equalization, which prevents oil leakage from the bearing into the machine enclosure.

3

Size

D (H7)

B b1 b2 b3 b4 b5 b6 b7 b8

nom. size d1 seal

(optional)

d2 d3 d5 d7 d9 d10 d11 d12 d13 d14 d15 d16

9 80

90

100

61,4

61,4

65

80 162 140 70 14 23 12 40 80/90

100/110 100 150 G 3/8 G11/4 11 6xM6

86

96

106

110

120

130

170 190 14 M12

11 100

110

125

81,4

81,4

85

100 187 165 80 15 29 17 50 100/110

125/140 125 180 G 3/8 G11/4 11 6xM6

108

118

133

135

150

160

195 215 14 M12

14

125

140

160

180

105,4

105,4

106,4

106,4

125 227 205 100 16 26 23 65 125/140

160/ 180

160

160

160

180

230 G 3/8 G11/2 11 6xM6

135

150

170

190

170

190

200

220

270 290 18 M16

18

160

180

200

225

135,7

135,7

140,4

140,4

160 265 241 116 18 31 25 70 160/180

200/225

200

200

200

225

275 G 1/2 G11/2 13 8xM8

172

192

212

237

215

240

250

275

320 340 22 M20

22

200

225

250

280

300

168,5

168,5

175,7

175,7

175,7

200 336 314 150 20 32 37 100

200/225

250/280

300

250

250

250

280

300

340 G 3/4 G 2 13 8xM8

214

239

264

294

310

265

290

315

345

345

380 400 26 M24

28

250

280

300

315

335

355

213,2

213,2

218,5

218,5

218,5

218,5

250 387 365 170 24 43 42 110

250/280

300/3 15

355

315

315

315

355

355

355

440 G 3/4 G21/2 13 8xM8

266

296

316

331

351

371

325

355

375

390

410

430

500 525 33 M30

ZF BEARING DIMENSIONS

Dimensions in millimeters / Dimensions not shown see page 7

d4 = Earthing device or plug M12x1,5 d5 = Oil inlet ( oil circulation or recirculating pump ) d6 = Provision for thermometer G1/2" d7 = Oil sight glass or oil outlet ( oil circulation ) d8 = Plug G1/2" ( connection for heater, oil sump thermometer, water cooler ) d21 = Oil drain plug for size 9 until 18: G1/2"

for size 22 and 28: G3/4"

d22 = Oil filling or breather for size 9 and 11: G3/8" for size 14 and 18: G1/2" for size 22 and 28: G3/4"

t = Depth of thermometer bore

PLAIN BEARING TYPE Z

4

d18 d19

d20 (h8)

d51 d52 e1 e2 e3 e4 e5 e6 e7 e8 e9 h1 h2 l t 5 dia.

K

ZD titling pads

number per side

weight

appr .

kg

Oil

content

appr . l

310 340 280

110

120

125

20

20

16

30 15 35 35,5 60 20 85 22,5 175 250 118 270

115

115

115

190

14

16

20

47 2,7

350 380 315

135

140

150

20

20

16

30 17,5 40 42 70 22,5 100 22,5 195 280 135 310

135

135

135

212

16

18

22

72 4

415 460 355

165

180

195

-

25

25

20

-

30 27,5 60 55 85 27,5 125 27,5 240 340 165 370

165

165

145

125

280

18

20

24

-

128 7,5

490 540 400

210

230

245

-

31,5

31,5

25

-

30 30 70 68 105 30 155 30 270 400 225 440

197

197

175

150

335

18

20

24

-

210 14

620 680 500

265

285

305

320

-

40

40

31,5

25

-

35 35 80 83 135 40 175 40 350 450 275 550

252

252

236

198

174

425

18

20

24

32

-

410 24

770 850 600

325

355

365

-

-

-

50

50

40

-

-

-

45 45 95 106 155 50 220 50 400 300 330 690

323

323

273

268

243

225

530

18

20

24

-

-

-

700 35

Version ZA

5

Size D1) b202) b213) b22 b234) b24 b25 d30 d31 (e8)

d32 d33

d34 (e8)

d355)

(e8) d50 R16) R26) R3

9 80

90

100

80,4 90 100 50 50 106

110

120

130

80 90 100 110

- 80 90 100

90

100

110

100

110

120

130

132

142

143

2,5 4 1,6

11 100

110

125

100,4 110 120 50 55 113

135

150

160

100 110 125 140

- 100 110 125

110

125

140

125

135

150

160

157

162

168

2,5 4 1,6

14

125

140

160

180

125,4 140 150 60 60 123

170

190

200

220

125 140 160 180

- 125 140 160

140

160

180

200

160

180

170

190

200

220

192

207

217

-

4 6 2,5

18

160

180

200

225

160,4 180 188 60 65 127

215

240

250

275

160 180 200 225

- 160 180 200

180

200

225

250

200

225

215

240

250

275

244

264

273

-

4 6 2,5

22

200

225

250

280

300

200,4 220 240 70 70 140

265

290

315

345

345

200 225 250 280 300

- 200 225 250 280

225

250

280

315

335

250

280

300

265

290

315

345

345

308

328

339

348

-

6 10 4

28

250

280

300

315

335

355

250,4 280 296 70 75 139

325

355

375

390

410

430

250 280 300 315 335 355

- 250 280 280 315 335

280

300

315

335

355

375

315

355

325

355

375

390

395

395

378

408

408

-

-

-

6 10 6

1) Limit dimensions of the shaft acc. DIN 31 698, form and positional tolerance

and surfaces roughness acc. DIN 31 699.

2) Standard thrust clearance is 0,5mm. If reversible thrust loads or shock load

occur, dimension b20 can be reduced by 0,2mm. If a locating bearing (shell type

B,K) is needed only for test runs, dimension b20 can be enlarged by 4 up to 6mm.

3) If the non-locating bearing has to allow larger motions (due to heat expansion

or to large thrust clearances caused by the unit), dimension b21 can be enlarged. 4) The dimension b24 is valid for a bearing with a floating labyrinth seal.

5) The dia. d35 can be combined with every shell dia. D within one size.

6) The radii R1 and R2 can be replaced by a plunge cut acc. DIN 509.

DIMENSIONS OF SHAFT

PLAIN BEARING TYPE Z

For locating bearing Bearing Shell Z...B (d30; =10) ZK (d30; =10) ZD (d30; =10) ZA (d50; =15)

For non-locating bearing Bearing Shell Z...Q

Machine side

Machine side

Dimensions in millimeters

6

Size b33 b34 b35 b367) b37 d18 d20

d418) (Optional)

d42 d43 d44 d45 d46

Weight

appr.

kg

9 60 35 10 24 151 310 280 111,5

121,5

131,5

180 360 380 6,6 14

10,5

10,0

9,5

11 65 35 10 26 168 350 315 136,5

151,5

161,5

210 400 420 6,6 14

12,6

11,7

11,1

14 70 35 10 26 193 415 355

171,5

191,5

201,5

221,5

250 375 390 6,6 -

12,6

11,1

10,3

9,5

18 75 40 10 28 216 490 400

216,5

241,5

251,5

276,5

270

310

430 455 9 -

18,7

16,1

15,0

14,0

22 80 40 10 28 255 620 500

266,5

291,5

316,5

346,5

346,5

320

375

535 570 9 -

24,5

21,3

17,8

16,1

16,1

28 85 50 10 30 282 770 600

326,5

356,5

376,5

391,5

396,5

390

440

640 680 9 -

43,0

37,2

33,0

30,0

29,0

7) Min. thickness of the machine shield 8) In order to allow the assembly of the machine seal, the inner dia. d41 must be larger as dia. of the shaft collar d30 of the locating bearing

DIMENSIONS OF MACHINE SEALS

7

Size D b27 b28 b29 b30 b31 b32 d3 d14 d36 d37 d38 d39 d40

9

80

90

100

110

29 39 27 14 8 21,5 150 190 155 155 148 155 155

11

100

110

125

140

31 41 27 16 8 21,5 180 215 180 180 178

155

180

155

190

14

125

140

160

180

33 43 27 18 8

21,6

26,5

230 290 240 240 228

180

240

180

240

18

160

180

200

225

29 39 27 14 8 26,5 275 340

240

280

240

280

273

240

280

240

280

22

200

225

250

280

300

29 39 27 14 8

26,5

31,5

340 400

280

346

280

346

338

280

346

280

346

28

250

280

300

315

355

29 39 27 14 8 31,5 440 525

346

410

346

410

438

346

410

346

410

TYPES AND DIMENSIONS OF SEALS

PLAIN BEARING TYPE Z

* Can be combined with a bolt-on baffle (IP 55) or a dust flinger (IP 54) too.

Special seal designs for specific applications upon request.

8

Example for the nomination of a bearing:

Z F N L B - 11 - 125 ZOLLERN end flange mounted, finned bearing,

natural cooled by convection, plain cylindrical bore

with loose oil ring, plain White metal lined

shoulders with oil grooves (locating or non-locating

bearing), size 11, for shaft diameter 125mm.

Nomination of Bearing

Z F

1 2 3 4 5 6 7

1 Type Z ZOLLERN plain bearing

2 Housing F End flange mounted bearing, finned

3 Heat dissipation N Natural cooled by convection

Z Lubrification by oil circulation with

external oil cooling

X Lubrification by oil circulation with

external oil cooling for high oil

throughput

W Finned water cooler in the oil sump

U Recirculating oil pump and natural

cooling

T Recirculating oil pump and water cooler in the oil sump

4 Shape of bore and type of lubrication C Plain cylindrical bore without oil ring

L Plain cylindrical bore with loose oil ring

F Plain cylindrical bore without oil disk

Y Two-lobe bore without oil ring

V Four-lobe bore without oil ring

K Journal tilting pads without oil ring

5 Geometry of thrust bearing

Q Without thrust capability

B Plain white metal lined shoulders

with oil groves

K Tapered land thrust faces for both

sense of rotation

D Tapered land thrust faces for one

sense of rotation

A Round tilting thrust pads, cup spring

supported

6 Size

7 Shaft diameter (mm)

Checklist:

Bearing requires electrical insulation? Bearing requires electrical grounding? What is the type of the external seal (floating labyrinth seal, IP55 baffle, cover, etc.)? What is the diameter of the external seal? Does the bearing have an external baffle? If so, what is its type and internal diameter? What is the internal seal diameter? Will the bearing be supplied by Zollern with the machine seal?

If so, what is its internal bore diameter? Does the bearing have hydrostatic system (jacking)?

Z bearings are supplied without oil inlet or outlet flanges. Under request, as additional items, Zollern can supply these flanges according to DIN 2573 or ANSI B16.5 norms.

Oil outlet flanges with weir is to be mounted horizontally top at the bottom. The mark at the flange will then be visible vertically up.

9

Sales Department Tel: +55 32 3429 5304 3429 5305 3429 5318 Fax: +55 32 3429 5303 Vendas-mg@zollern.com.br

For customers in the Americas, South Africa and India

Engineering Department Tel: +55 32 3429 5307 3429 5306 ea@zollern.com.br

Brazil plant Zollern Transmisses Mecnicas LTDA

Av. Manoel Incio Peixoto, 2147 CEP: 36771-000 Cataguases-MG-Brasil

Osterode plant Zollern BHW Gleitlager Gmbh & Co. K. Rolandsweg 16-20 D-37520 Osterode am Harz

Contact Tel: +49 55 22 31 27 10 Fax: +49 55 22 31 27 99 bhw@zollern.de

For customers in Europe, Asia (except India), Oceania and North Africa

USA plant Zollern North America L.P

15825 State Hwy 249, Suite 27 Houston, TX, 77086 - USA

ZOLLERN PLANTS

Contact Tel: +1 713 673 79 02 Fax: +1 713 673 79 50 zollernna@zollernna.com

For customers in the America

10

CONTACTS FOR Z BEARING IN ZOLLERN GROUP

France ZOLLERN S..r.l 13, Rue Allwies F-57200 Sarreguemines Tel. +33 3 87 95 35 14 Fax +33 3 87 95 35 21 eMail zollernsarl@wanadoo.fr www.zollern.fr

Netherlands ZOLLERN Nerderland B.V. Postbus 134 NL-5150 AC DRUNEN Tel. +31 41 63 22 92 0 Fax +31 41 63 20 93 6 eMail zollern@zollern.nl www.zollern.nl

Spain Trade Representative: Barcelona - Spain Jesus Villa Nueva Tel./Fax +34 938 10 16 08 Mobile +34 619 54 87 76 eMail jesus.vilanueva@telefonica .net

Great Britain ZOLLERN UK Limited Castle Hill Kenilworth GB-CV8 1NB Tel. +44 19 26 51 54 20 Fax +44 19 26 85 34 11 eMail sales@zollern.co.uk www.zollern.co.uk

Italy ZOLLERN Italiana S.r.L. Via della Cioca. 9 l-21026 Gavirate (VA) Tel. +39 03 32 46 20 59 Fax +39 03 32 46 20 67 eMail info@zollern.it www.zollern.co.uk

India ZOLLERN GmbH &CO KG 4

th Floor Statesman House Building

Barakhamba Road Connaught Place New Delhi 110001 India

Tel. +39 03 32 46 20 59 Fax +39 03 32 46 20 67 eMail assem.talwani@zollern.com

ALL RIGHTS RESERVED TO ZOLLERN GROUP

ZM - CENTER FLANGE BEARING The Zollern type ZM of horizontal bearing is designed acc. to DIN 31 694 norm specifications for a wide range of heavy duty applications (electrical machines, turbines and test rigs)

ZR - PEDESTAL BEARING The Zollern type ZR of horizontal bearing is designed acc. to DIN 31 690 norm specifications for a wide range of heavy duty applications (electrical machines, turbines, blowers and test rigs)

Our products are subject to constant technical alterations and developments and thus revisions may occur without prior or subsequent notice. This catalog is a preliminary version. A new version will be published soon, but all dimensions here shown will be kept.