This document discusses oscillating bearing units (OBUs) that are used in printing presses. It proposes using sealed units that contain cylindrical roller bearings, housings, seals, and long-term grease lubrication. This provides advantages like long relubrication intervals, reduced leakage, and making the presses "oil-free". Diagrams show two concepts for the OBUs: with or without a shaft. Arrangement 3 with an external oscillator is recommended for ease of handling and integration into the printing press assembly process.

1. We keep the presses rolling
OBU - Oscillating Bearing Unit
Units for inking- and dampening rollers
(oscillating rollers)

2. We keep the presses rolling
Oscillating bearing: Current design
Current solution:
• cylindrical roller bearing
with wider innerring

3. We keep the presses rolling
Oscillating bearing: Recommended Product Range
30.10.03
1) = permissible axial displacement from normal position
- oscillating bearings have normally a polyamidcage, except BC1-0628
- the standard radial clearance is bigger than normal (C3)
- oil and grease lubrication are possible
- other sizes then in the table above on request
Designation d
[mm]
D
[mm]
CAR
[mm]
B
[mm]
C
[kN]
C0
[kN]
s1
[mm]
BC1-0160 17 40 16 57,5 23,8 21,6  22
BC1-0628 40 68 15 71 25,1 26  30
BC1-0216 45 75 16 42 44,6 52  12,5
BC1-0190 45 75 21 50 44,6 52  17,5
BC1-0043 55 100 21 45 84,2 95  13
BC1-0454 55 100 21 54 84,2 95  17,5
BC1-0318 55 100 21 59 84,2 95  20

4. We keep the presses rolling
• sealed unit, based of cylindrical roller bearing, without shaft
Components:
 housing
 cover
 bearing
 sealings
 grease
 sensor (opt.)
Oscillating Bearing Unit OBU: Concept 1
• operator side

5. We keep the presses rolling
• sealed unit, based of cylindrical roller bearing, with shaft
• interface to the oscillating roller: flange, coupling or other linking
Components:
 housing
 shaft
 cover
 bearing
 sealings
 grease
 sensor (opt.)
Oscillating Bearing Unit OBU: Concept 2
• operator side

6. We keep the presses rolling
Oscillating Bearing Unit OBU: Sealing
depends on:
• the influences from outside of the unit
• available space within the design
• the requirements of the customers
• the chosen kind of lubrication
possible sealings:
 presealing
 gapsealing (f.e. gap-, chamber-, labyrinthsealing)
 recommendation SKF: - gapsealing
(- or, if necessary, a combination of
preseal- and gapsealing)

7. We keep the presses rolling
Oscillating Bearing Unit OBU: Lubrication
kind of lubrication depends on:
• requirements of the customers
• the environmental conditions
possible kinds of lubrications:
 long time grease lubrication (specially tested by SKF)
 continuously grease lubrication
 oil circulation or oil bath lubrication
 recommendation SKF: long time grease lubrication

8. We keep the presses rolling
Oscillating Bearing Unit OBU:
Advantages of long time grease lubrication
 long relubrication intervalls (3-5 years)
 specific balancing between grease, amount of grease and sealing
 application fits in the concept "oilfree press"
 no oil-leakages
 less oilpipes are needed
 no need of central grease lubrication system

9. We keep the presses rolling
 complete unit, ready to mount
 easy integration in mounting procedure
 time consuming mounting at the press producer is not longer necessary
 no risk of contamination during mounting
 longtime grease lubrication
 one article code, i.e. less numbers of single positions
 easier handling, disposition, management of inventory stocks
 reducing total costs
Oscillating bearing unit OBU: Benefits

10. We keep the presses rolling
Oscillating Bearing Unit OBU: Customer Requirements
 for life lubrication ( longtime grease lubrication)
 reducing costs ()
 easy and plain mounting ()
 benefits for enduser ( - longtime grease lubrication, numbers of spare parts)
 references ( tests with oscillating bearing unit within SKF;
oscillating bearings are in the field since 10 years)
 longtime usage/high quality ()
 environmental friendly ()
 one contact person ()
 easily handling/logistics ()
 new ideas ()

11. We keep the presses rolling
Oscillating Bearing Unit OBUs: Arrangement 1
- oscillating bearing unit without shaft -
• OBU for operator side • OBU for drive side (oil from outside)

12. We keep the presses rolling
Oscillating Bearing Unit OBUs: Arrangement 2
- oscillating bearing unit with shaft, for splited cylinder -
• OBU for operator side • OBU for drive side (oil from outside)

13. We keep the presses rolling
Oscillating Bearing Unit OBUs: Arrangement 3
• OBU for operator side • OBU for drive side• [splited cylinder] • external
oscillator
• oscillating bearing unit with shaft
• drive (external oscillator)
• [splited cylinder]
Advantages of arrangement 3:
 easy handling of interfaces
 all parts out of one hand
 easily inclusion in whole process (samples/tests/series)

14. We keep the presses rolling
Oscillating Bearing Unit OBUs: Arrangement 3
• external oscillators of Scandrive
• variable stroke • fixe stroke