The Omega spacer coupling design (page E-6 & E-7) provides a clear space between hubs. There are no interfering center members or spools. Thus, shaft spacings as small as 1/4 inch can be achieved. However, for such small spacings, use of the standard Omega coupling would be recommended. The maximum shaft spacing for each coupling is shown on page E-6 & E-7. Any ANSI, ISO or DIN spacing between 1/4 inch and the maximum listed can be achieved without any additional parts. Hubs can be placed on the shafts as shown below.

Figure A Both hubs mounted outward	Figure B One hub mounted inwardOne hub mounted outward
Figure C Both hubs mounted inward

Use one half of the flex element to establish shaft spacing and appropriate mounting position. Optional hole mounting positions and reversible hubs allow adjustments as needed. Select the combination which most closely matches the dimensions desired between shafts (Figure D). Drawings with specific mounting positions/dimensions are available from Rexnord.

Hubs can be flush with the shaft end (not shown), extended beyond the end of the shaft (Figure E) or recessed behind the shaft end provided there is sufficient keyway engagement (Figure F). Special sleeve extensions (See Page E-9) are available for spacing requirements in excess of those listed on pages E-6 & E-7.

Note: Shaft engagement should be equal to or greater than .8 times shaft diameter. 100% shaft engagement is suggested for compression bushed hubs.

Figure E

Figure F