Franke LVA Guide
Technical documentation
Bearing assemblies with integrated wire race bearing
Technical documentation LV / EN / Art.-Nr. 613761
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Technical documentation
LV
1. Bearing assemblies
1.1 Overview ............................................................................... 3
2. Calculation basis
2.1 Terms, unit of measurement .................................................. 4
2.2 Static calculation ................................................................... 4
2.2.1 Axial and radial factors
2.2.2 Recommended static safety Sst
2.3 Dynamic calculation............................................................... 5
2.3.1 Nominal lifetime
2.3.2 Axial and radial loads
2.3.3 Axial and moment load and axial load
with Fr= 0, Mk= 0
2.3.4 Radial and moment laod and radial load
with Fa= 0, Mk= 0
3. Rotational resistance and concentricity ............................ 6
4. Maintenance
4.1 Safety instructions for maintenance ....................................... 8
4.2 Maintenance work ................................................................. 9
4.2.1 Relubrication
5. Tools and accessoires
5.1 Tools needed ........................................................................ 11
5.2 Accessoires .......................................................................... 11
6. Imprint ................................................................................... 11
Table of contents
page page
3
Product KK-Diameter Material Gear teeth Illustration
LVA 100 - 1800 mm C45N without
LVB 100 - 1800 mm Aluminium without
LVC 100 - 1800 mm C45N without
LVD 100 - 1800 mm C45N/42CrMo4V straight gearing
LVE 100 - 1800 mm Aluminium AT10
Belt toothing
LVG 200 - 400 mm Aluminium without
1. Bearing assemblies
1.1 Overview
4
2.2 Static calculation
A static calculation is sufcient if the bearing is loaded at standstill. A bearing with sufcient load carrying capacity has been selected if the recom-
mended static safety is achieved.
1
FaFrM
+ +
Coa Cor Com
Sst =
2. Calculation basis
All forces and moments acting on the bearing are to be summarized by vectorial addition into centrally acting forces Faand Fras well as resulting
moments Ma. For complex load cases and load collectives with variable load and speed, we will be pleased to perform the calculation for you.
2.1 Terms, unit of measurement
C dynamic load rating (N)
C0static load rating (N)
Facentrically acting axial force (N)
Frcentrically acting radial force (N)
KKØ Ball race diameter = (D + d)/2 (M)
L nnominal life (h)
Mktilting moment (Nm)
n rotational speed (min – 1)
P dynamic equivalent load (N)
P0 statically equivalent laod (N)
Sst static safety
X Radial factor
Y Axial factor
Z Moment faktor
2.2.1 Axial and radial factors
2.2.2 Recommended static safety Sst
X0Y0
Alll bearing types 1.0 0.47
Ball diameter > 6 Sst
With quiet, vibration-free operation > 1.8
During normal operation > 2.5
With pronounced shock loads and high requirements on running accuracy > 8.0
5
2.3 Dynamic calculation
For a circulating speed of v > 0.1 m/s, a static and dynamic calculation is required, whereby the static safety Sst must reach at least the recommen-
ded value of the respective load (Table 2.2.2).
2.3.1 Nominal life
2.3.2 Axial and radial loads
2.3.3 Axial and moment load and axial load with Fr= 0, Mk= 0
2.3.4 Radial and moment load and radial load with Fa= 0, Mk= 0
We will be pleased to perform the calculation for you for the load case radial, axial and moment load.
L h= C· 60 (h)
Pn [1/min]
( )3
P = X · Fr+ Y · Fa(N)
P = Y · Fa+ Z · Mk(N)
KKØ
P = X · Fr+ Z · Mk(N)
KKØ
Fa≥ 1
Fr
Fa< 1
Fr
XYXY
All bearing types 1.26 0.45 0.86 0.86
0 < Mk≤ 0,5
Fa· KKØ
Mk≥ 0,5
Fa· KKØ
Y Z Y Z
All bearing types 0.86 1.72 0.45 2.54
0 ≤ Mk≤ 0,5
Fr· KKØ
Mk≥0,5
Fr· KKØ
X Z X Z
All bearing types 1.0 1.68 0.86 1.96
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3. Rotational resistance and concentricity
The following data are recommendations of the rotational resistance to be set. Depending on the manufacturing tolerances, the concentricity accu-
racies shown can be achieved.
LVA
Rotation resistance
LVB
Rotation resistance
Rotation resistance
Rotation resistance
Rotation resistance Rotation resistance
LVC
0.25
0.20
0.15
0.10
0.05
0.00
0.25
0.20
0.15
0.10
0.05
0.00
0.25
0.20
0.15
0.10
0.05
0.00
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Rotational accuracyRotation resistance
Rotation resistance
LVD
Rotational accuracy
LVE
Rotation resistance Rotational accuracy
LVG
Rotational accuracy
0.25
0.20
0.15
0.10
0.05
0.00
0.25
0.20
0.15
0.10
0.05
0.00
0.07
0.05
0.03
0.01
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Improper
Maintenance work WARNING!
Risk of injury due to improperly performed maintenance work!
- Ensure sufcient assembly clearance before starting work.
- Ensure tidiness and cleanliness at the assembly site!
- If components have been removed, ensure correct assembly, reinstall all fasteners and observe screw
tightening torques.
- When cleaning the bearing, use suitable cleaning agents that are compatible with the seal. For this
purpose, follow the instructions of the cleaning agent manufacturer.
Observe the following before recommissioning:
- Ensure that all maintenance work has been carried out and completed in accordance with the
information and notes in this manual.
- Ensure that there are no persons in the danger zone.
- Ensure that all covers and safety devices are installed and functioning properly.
NOTE!
Material damage due to faulty maintenance
- Inspect slewing ring for corrosion every six months.
- Depending on the application (e.g. inuence of vibrations), retighten the screw connections at regular
intervals.
- If the bearing makes running noises, switch off the machine and determine the cause of the fault.
- Check the seals of the bearing at regular intervals.
Incorrect maintenance
7. Maintenance
7.1 Safety instructions for maintenance
Environmental protection At all lubrication points supplied with lubricant, remove the escaping, used or excess grease and dispose
of it in accordance with the applicable local regulations..
Incorrect lubrication NOTE!
Material damage to the bearing due to improper lubrication!
- Only use greases approved by the manufacturer (chapter 5.1 “Approved lubricants”).
- Observe relubrication quantity and relubrication intervals (chapter 8.2.1 “Relubrication”).
- Relubricate the bearing only at operating temperature.
9
Relubrication of the bearing
Lubricants
When relubricating, rotate the bearing.
Relubrication
NOTE!
Material damage due to improper lubrication!
- Ensure that the lubricants are suitable for the respective application and for the materials used
(e.g. rolling bearing cage or seal).
- When mixing lubricants, consider the compatibility of the lubricant types. In particular, note the base
oil type, thickener, base oil viscosity and NGLI class. These questions must be claried in advance
with the lubricant manufacturer, especially if the bearing is used under extreme operating conditions.
Relubrication takes place via the gap between the inner and outer ring.
7.2 Maintenance work
7.2.1 Relubrication
For long-term lubrication, use high-performance bearing lubricants due
to their higher ageing resistance. Franke recommends the special lubri-
cating grease „SHELL Gadus S3 V220 C2“ or comparable.
Perform relubrication below the operating temperature of the bearing.
1
2
The relubrication period is application-specic. The following table
shows reference values.
For recommended lubricants, see page 11.
10
Wire bed height N for LV series:
KK100 - 350mm: 13 mm
KK400 - 1000mm: 17.5 mm
KK1200 - 1800mm: 20.9 mm
Wire bed height
Relubrication quantity for bearing elements:
m = KKØ * (N * 2) / 3 * x
m = relubrication quantity in grams
ØKK = ball ring diameter
M = wire bed height in millimeters
x = factor x in mm -1 according to table for relubrication quantity
Relubrication intervals
Relubrication x in mm -1
Weekly 0.002
Monthly 0.003
Yearly 0.004
Every 2 - 3 years 0.005
Peripheral speed in m/s Relubrication interval
in h
0 bis < 3 5000
3 bis < 5 1000
5 bis < 8 600
8 bis < 10 200
Once the relubrication frequency has been determined, calculate the relubrication quantity
using the following formula.
3
When lubricating toothed bearings, automatic gear lubrication is
recommended. In the case of manual lubrication, lubricate the gearing
and pinions before commissioning.
Always contact customer service in the event of any uncertainties.
11
Lubricants standard:
Special lubricants for special applications are available on request. We will be pleased to advise you on this.
Application area Manufacturer Description Usage Container Order no.
Universal
applicable Shell Gadus
ex factory in all slewing rings of the
standard series LVA, LVB, LVC, LVD,
LVE, LVG
400g 45176
Status: 13. Juli 2022
• Torque wrench
• Dial gauge
• Allen wrench
• Screwdriver
• Surface cylindrical grinding machine (for massive tuning)
• Feeler gauge
• Spring scale (or similar)
• Lever for measuring the torque
5.2 Accessoires
The following accessories are optionally available:
• Reconciliation supplements
• Seals
• Spare balls (G25 according to DIN 5401) for bearing elements
• Retaining screws
© Franke GmbH
Obere Bahnstr. 64
73431 Aalen
Tel. +49 7361 920-0
www.franke-gmbh.com
Status: 2022
All rights reserved.
No liability for errors or
printing mistakes.
This manual is also as a
download (PDF) on our website.
www.franke-gmbh.com/downloads
6. Impressum
5. Tools and accessoires
5.1 Tools needed
This manual suits for next models
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Table of contents
