ZF Flange Bearing
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Miba Industrial Bearings ZF End Flange Mounted Bearing

The Industrial Bearing Branch of the Miba Bearing Group produces hydrodynamic bearings and labyrinth seals for use in mechanical and plant engineering which are used in a wide range of high-performance applications. Our highly inspired teams, work diligently to serve our customers the best bearing solutions for each and every application. Content Side Description of the ZF design The 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 to the...

Oil supply Fully self-contained lubrication is achieved by using a loose oil ring. Alternatively, where bearings are lubricated by an external oil circulation system, this loose oil ring can be used to permit an emergency shutdown without damage in case an oil system failure occurs. Z-bearings can be used for marine applications, where an oil ring guide assures proper lubrication even 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...

Radial and axial loads Radial bore profile selection 1 // Radial and axial loads The radial bore profile type selection depends on several conditions. Among them we have the circumferential speed and the specific pressure. The following table should help in a preliminary selection. Oil flow Z-bearings are supplied without oil inlet or outlet flanges. Upon request, as additional items, Miba Industrial Bearings can supply these flanges according to DIN 2573 or ANSI B16.5 norms. Oil outlet flanges with weir are to be mounted with the weir horizontal at the bottom. The mark on the flange will...

* in case of thrust face type "A" measure ”B" = 225,7 ** additional cost will be applied d4 = Earthing device or plug M12x1,5 d5 = Oil inlet (oil circulation or recirculating pump) d6 = Provision for thermometer G 1/2" d7 = Oil sight glass or oil outlet (oil circulation) d8 = Plug G 1/2" (connection for heater, oil sump thermometer, water cooler) d21 = Oil drain plug for size 9 up to 18: G 1/2" for size 22 and 28: G 3/4" d22 = Oil filling or breather for size 9 and 11: G 3/8" for size 14 and 18: G 1/2" for size 22 and 28: G 3/4" t = Depth of thermometer bore Drawings shown here are for...

1) Limit dimensions of the shaft acc. DIN 31 698, form and positional tolerance and surfaces roughness acc. to DIN 31 699. 2) Standard thrust clearance is 0,5 mm. If reversible thrust loads or shock load occur, dimension b20 can be reduced by 0,2 mm. If a locating bearing (shell type B,K) is needed only for test runs, dimension b20 can be enlarged by 4 up to 6 mm. 3) If the non-locating bearing must allow larger motions (due to heat expansion or to large thrust clearances caused by the unit), dimension b21 can be enlarged. 4) Dimension b23 is valid for a bearing with a floating labyrinth...

1 // Dimensions of machine seals Floating labyrinth seal (Protection IP 44) Rigid seal* Floating labyrinth seal (Protection IP 44) with bolt-on baffle (Protection IP 55) Can be combined either with a bolt-on baffle (IP 55) or with a dust flinger (IP 54). Floating labyrinth seal End cover with dust flinger (Protection IP 54) Max. axial movement of the dust flinger ± 6,5mm (Meets NEMA spec.) Special seal designs for specific applications upon request.

1 // Type Z Plain bearing Example of a bearing designation: 2 // Housing Z F N L B - 11 - 125 F End flange mounted bearing, finned 3 // Heat dissipation N Naturally cooled by convection Z Lubrication by oil circulation with external oil cooling Lubrication by oil circulation withexternal oil cooling for X 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 End flange mounted, finned bearing, naturally cooled by convection, plain cylindrical bore with loose oil ring, plain white metal...

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