Siemens 1MB115 Installation And Maintenance Manual page 91

• Correct balancing of parts to be fitted to the shaft end.
• Maintaining the vibration velocity according to ISO 10816-3.
3.4.2 Align with driven machine and fixing
3.4.2.1 Selecting bolts
• Unless specified otherwise, use fixing screws with at least strength class
8.8 to ISO 898-1 to ensure that the machine is securely mounted and to
transmit the torque-generated forces.
• When selecting the bolts and the design of the foundation, take into
account the maximum forces occurring in the case of a fault such as short
circuit or system transfers in phase opposition, etc. Request the foundation
force values from the Service Center if required.
3.4.2.2 Aligning and attaching the machine to the driven machine
(B3/B35 with feet)
1. Refer to any instructions for aligning the driven machine and those of the
coupling manufacturer.
2. Align the machines with coupling output to the driven machine in such a
manner that the center lines of the shafts are parallel with no offset. This
ensures that no additional forces affect their bearings during operation.
3. For the vertical positioning (x → 0) place thin shims under the machine
feet. The number of shims should be kept as low as possible, i.e. stack as
few as possible. This also prevents the machine being subjected to any
stress/distortion. If available, use the existing tapped holes for the forcing-
off bolts to somewhat raise the machine.
4. When positioning the machine, ensure that a uniform axial gap (y → 0) is
maintained around the coupling.
5. Fix the machine to the foundation. The choice of fixing elements depends
on the foundation and is the plant operator's responsibility.
Note
Machine expansion
When aligning, make allowance for the thermal expansion of the machine
when the temperature increases.
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