Miller Millermatic Spoolmate 185 Spool Gun Owner's Manual page 20

2-13. Installing MIG Wire Spool and Adjusting Hub Tension
Use compression spring with
8 in (200 mm) spools.
When a slight force is needed to turn spool, tension is set.
Tools Needed:
15/16 in
ST-072573-B
OM-1322 Page 16