No Bearings At The De - Siemens SIMOTICS T-1FW3 Configuration Manual

Configuration
5.4 Mounting
5.4.5

No bearings at the DE

Option "No DE bearings" is designated with a "3" at the 16th position of the article number.
1FW3☐☐☐-☐☐☐☐☐-☐☐☐3
Properties
● Stiff rotor and stator mounting for the "hollow shaft" and "plug-on shaft" versions
● Only a few mounting components are required
● Provides the possibility of mounting bearing modules to absorb increased process forces
● Not available for solid shaft versions (15th position in the Article No.: "H" and "M")
Note
• Avoid any radial overdetermination of the remaining bearing at the NDE; this must be
verified by making the appropriate calculation.
• Comply with the mounting conditions, see dimension drawing 609.30284.01, no DE
bearings.
• Limit the axial temperature expansion of the machine shaft as specified in dimension
drawing 609.30284.01, DE without bearings
• Dimension drawing 609.30284.01, DE without bearings refers to the mounted state.
Dimension "L" in the dimension drawing can be higher at a motor when originally shipped
• The motor shaft creates a radial force as a result of this bearing type.
Take into account the radial force in the customer's machine design, see the following
table.
• Only operate the motor when it is mounted.
Frame size
1FW315☐
1FW320☐
1FW328☐
Note
Torque motors shall not be used without bearings and/or similar mountings. By
installing/usage of option 1FW3xxx-xxxxx-xxx3 (motor without bearing) Customer bears the
full responsibility to comply with the aforesaid precondition. In connection with option
1FW3xxx-xxxxx-xxx3 (motor without bearing) Siemens does not grant any warranty and shall
not be liable with respect to any claims arising out of or relating to the combination with or
incorporation into the motor with any other product, component or machine; customer shall
hold Siemens harmless against any third party claim thereof.
If you have any questions regarding the general conditions, contact the Siemens Service
Center.
138
Radial force [N]
800
2000
4100
1FW3 complete torque motors
Configuration Manual, 08/2020, A5E46027705B AA