I
nstallation Manual

 

 

 

 

•Using straight edge (fig 3a): Align straight edge on OD of one half measure gap ‘X’ at 4 places 90° apart without rotating shafts. Gap ‘X’ should be less than the allowable initial parallel misalignment (P) mentioned in Table ‘C1’.


• Using dial gauge (fig 3b): Fix dial gauge on the hub of one of the half & set plunger on the OD of another half. Rotate the coupling slowly to one complete revolution by taking dial gauge reading at 4 places 90° apart. The parallel misalignment is half of the Total Indicated Reading (TIR) of dial gauge which should not exceed the value ‘P’ given in Table ‘C1’.


• Follow the same procedure in case of spacer coupling as shown in fig. 3c.

 

• Using feeler gauge (fig 4) : Measure gap ‘G’ at 4 places 90° apart without rotating shafts. The difference in maximum & minimum gap will be the Total Indicated Reading (TIR), which will be the angular misalignment present (Refer Table ‘C1’ for allowable TIR values in mm).


• The values for deviation in standard gap i.e. angular misalignment should be within the limits as shown in table ‘C1’.


• Using dial gauge (fig 4) : Fix the dial gauge on hub OD of one of the halves & set plunger on the face of the another half as shown. Rotate the coupling slowly to one complete revolution by taking dial readings at 4 intervals 90° apart. The Total Indicated Readings (TIR) will be the angular misalignment (Refer Table ‘C1’).
• Follow the same procedure in case of spacer coupling as shown in fig. 4a.

III) CHECKING AXIAL MISALIGNMENT (End-Float)


• Deviation from standard DBSE due to axial movement of shaft is defined as axial misalignment (End float). [For normal applications the shaft ends should be flushed with inner face of hub/adapter. In some special cases the shaft ends may protrude beyond the inner face of hub/adapter or may remain inside if required.]


• The distance between two faces of coupling halves is to be maintained as specified. The variation in this distance should not exceed the permissible initial axial misalignment given in table ‘C1’. (Refer Fig. 2)


• Repeat the above steps until the required permissible initial misalignment limits are achieved. Tighten foundation/base frame bolts & ensure the tightening of set screws over keys.


IMPORTANT - The misalignment capabilities shown in drawings & product literature allow for dynamic conditions & variations. For optimum service from the coupling, the installation misalignment (initial misalignment) should not be more than 25% of the maximum allowable misalignment limits. Allowance should be made for any anticipated movements, which will occur during operation (e.g. thermal movements)