The Bearing Housings
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Page Bearing Housings And Mounting Accessories 2 Plummer Block Housings With Oil Lubrication SNOE 14 Designs 14 Mine Car Bearing Housings TVN 16 TVN Housing For High Temperature Applications 16 Plummer Block Housings TN 17 Double And Triple Bearing Housings ZLG/DLG 18 Designs 18 Oil Lubricated Double Bearing Housings ZLOE 23 Designs 23 Page Flange Bearing Housings 722500 25 Sealing Systems And Lubrication 25 Flange Bearing Housings F 11200 26 Plummer Block Housings SD 3100 TS 27 Dimension Tables SNOE 200 Plummer Block Housings 28-29 SNOE 300 Plummer Block...

Especially for the demand in the ventilator industry we extended our range of oil lubricated double bearing housings (ZLOE) with several new models. All plummer block housings (grease and oil lubricated) are also obtainable fully assembled with shaft. Our strengths are particularly geared towards the design and production of special housings. In this area too, we have also developed new solutions in close cooperation with our customers. Our different production options enable us to produce small and bulk volumes at top quality, quickly and inexpensively. Our customers have been opting for...

Bearing Housings and Mounting accessories A bearing housing is a module which contains the following components: • a housing made of cast iron or special materials, 2-part or compact, that can be screwed onto the mounting surface with bolts; • one or several bearings, which is/are mounted either directly onto the shaft or which is/are attached with the aid of an adapter sleeve; • a sealing system to protect the bearings in service; • a device for re-lubrication of the bearings under running conditions. Housings Housing design The bearing housing design is available in two basic versions: •...

Bearings with cylindrical bores Bearings with cylindrical bores are mounted directly onto the shaft. A shaft fit is to be selected that matches the application and bearings used. The bearing itself must however be firmly mounted onto the shaft. An SNR induction heating device should be used (see annex p. 59) to mount the bearing. Cylindrical bearings require a shaft shoulder as a contact surface within the housing. This in turn means that the diameter of the inlet or outlet bore in the housing generally deviates from the diameter of the bearing used. The figure below shows a double bearing...

Bearing with tapered bore Bearings with a tapered bore are mounted onto the shaft with the aid of an adapter sleeve. Here the tolerance of the shaft may be higher than for bearings with a cylindrical bore. Fundamentally, bright-drawn shafts may be used (fit h7 - h9). The bearing ring is fastened onto the sleeve by clamping it axially. In doing so the radial bearing clearance after mounting must be adhered to (see SNR mounting card p. 11). The figure below shows a flange bearing housing. Bearing clearance Bearings with tapered bores are made with a greater radial clearance than normal as...

Sealing Systems Felt strip seal The felt strip, as under DIN 5419, is the reliable standard sealing for many SNR bearing housings. It is easy to fit and can be used for circumferential speeds up to 5 m/s, after a running-in period (approx. 2 hours) up to 15 m/s. Felt seals are suitable for grease lubrication and temperatures of -20 to +100 °C. At higher temperatures up to approx. 300 °C we will be pleased to offer you a selection of special materials.* V-ring seal Bearing housings which are processed on the front end can be equipped with a V-ring seal. We mainly use V-rings in combination...

Double lip seal Each SNR bearing housing can accommodate a double lip seal in the ring groove (where available). The design of this seal, which is also made of the NBR (nitrile rubber) material, excels on account of the following sealing properties: • low increase in friction torque • optimum protection against foreign particles and moisture • Improvement in sealing performance through introduction of lubrication grease between the sealing lips when mounting and continuously during operation. Maximum shaft misalignment: ± 0.5° Maximum circumferential speed of shaft: 15m/s Maximum service...

Grease Lubrication In the overwhelming majority of bearing housing applications grease lubrication is used for the bearing location. Depending on the service case, the initial grease application when fitting should last for a bearing service life. At higher loads, temperatures or speeds the volume of the lubrication medium loses its lubricating capability in the course of service as a consequence of mechanical load, ageing and increasing contamination. In this case grease must be added to or changed. If the service case demands regular lubrication then all SNR bearing housings can...

Sealing compound Bentonite grease + Polyurea + Na soap Al complex Ba complex Na complex Bentonite grease + + + Source: Kluber The SNR-LUB EP grease is a lithium soap based mineral oil grease and ideally suitable for the following conditions: • Operating speed of bearing max. 80% of limit speed • Bearing operating temperature < 100 °C • Bearing load ratio C/P < 3.5 In the event of divergent operating conditions please contact the SNR engineers. An overview of the general range of SNR-LUB standard greases is available in a special leaflet. Oil lubrication Oil lubrication is much...

Bearing Clearance Double-row spherical roller bearings with tapered bore (models 21000 K, 22000 K, 23000 K with concentricity 1:12 and model 24000 K with concentricity 1:30) can be fitted with an adapter sleeve or a withdrawal sleeve, and directly in the event of a tapered shaft. The mounting process causes the inner ring to be expanded and this in turn reduces the radial clearance. The remaining bearing clearance must be checked after mounting is complete. How to measure it: 1.) Caution: One may not perform the measurement on a greased bearing, because the thickness of the lubrication film...