Rim and Face Shaft Alignment

Rim and Face Shaft Alignment

Millwright

First Period

Machine Alignment

160108b

© Her Majesty the Queen in Right of the Province of Alberta by the Minister of Advanced Education. 1998

Figure 1 - Shafts on a common centreline.


Figure 2 - Types of misalignment.


Figure 3 - Effect of misalignment on bearing life.


Figure 4 - Offset Misalignment.


Figure 5 - Angular Misalignment.


Figure 6 - Misalignment tolerance guide for spacer shafts and disc couplings.


Figure 7 - Dial indicators.


Figure 8 - Brackets, clamps and bars.


Figure 9 - Pipe strain check.


Figure 10 - Mounting foot details.


Figure 11 - Jacking bolts.


Figure 12 - Commercial shims.


Figure 13 - Soft foot conditions.


Figure 14 - Special shims.


Figure 15 - Soft foot check using foot dial.


Figure 16 - Soft foot check using rim dial.


Figure 17 - Dial arrangement for rim and face alignment.


Figure 18 - Shaft and coupling run-out.


Figure 19 - Radial dial bar sag at 12 o'clock position.


Figure 20 - Radial dial bar sag at 6 o'clock position.


Figure 21 - Measurement of dial bar sag.


Figure 22 - Dial bar clamp.


Figure 23 - Axial dial bar sag.


Figure 24 - Measurement of offset misalignment.


Figure 25 - Tools for measurement of angular misalignment.


Figure 26 - Misalignment measurement using dial indicators.


Figure 27 - Processed TIRs in mils.


Figure 28 - Rim and face vertical alignment formula.


Figure 29 - Example 1: Vertical alignment.


Figure 30 - Example 2: Vertical alignment.


Figure 31 - Corrected readings.


Figure 32 - Rim and face horizontal alignment formula.


Figure 33 - Example 1: Horizontal alignment.


Figure 34 - Example 1: Horizontal alignment - corrected for zero.


Figure 35 - Example 2: Horizontal alignment.


Figure 36 - Corrected readings for perfect alignment.


Figure 37 - Uncorrected readings for perfect alignment.

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