This spool is used in the Climber in a Box Winch Kit. It's used with 10 feet of Rope to create a strong elevator or winch system. Leave out the spacer for a spool to go with a one stage climber, or add the spacer in the middle to make the spool wide enough for the 2 stage climber.
ip-4647 Climber In A Box Winch Spool Half.pdf
ip-4647 V2 Winch Spool Half.STEP
This is an 8 mm round bore bearing that is unflanged. The Shielded Ball Bearing is a great way to make things spin fast!