Multiwing Uniboss Center Boss, Standard Length, 5-Bolt 75mm, SH Taper, AR/BR Pull-Through (Reverse Mount)

AR/BR style (pull-through / reverse mount). Multiwing Uniboss center boss, standard length, machined for an SH taper bushing (SH bushing sold separately). 75 mm pilot; bolts into the 75 mm center of a Multiwing or Wing Fan Z hub plate set with 5 bolts on a 90 mm circle.

• Mounting style: AR/BR, pull-through (Multiwing term), also called reverse mount (Wing Fan term)
• SH taper bushing (not included): 5/8", 7/8" or 1-1/8" bore
• 75 mm pilot, 5 bolts on a 90 mm circle
• Standard length

In the AR/BR (pull-through) arrangement the bushing faces the motor and the bolts are reached from the other side, which suits short shafts. The last three photos show an SH bushing installed as an example, the last one with the boss mounted in a 10-blade H hub (hub not included).

What it fits

Fits any 5-bolt, 75 mm hub plate set, such as our 9-blade Multiwing Z hub set.

Other styles

Need a longer boss? See the Multiwing SH center boss, extended 62 mm, AR/BR pull-through. Also in AR/BR for an SH bushing: the Wing Fan SH center boss, reverse mount.

Not sure what you have?

Use our fan identification form. It walks you through the diameter, blade count, hub size and series in a few minutes, and you can attach photos. We will confirm the right part before you order.

Ordering and shipping

• Stock shown is what is on our shelf today.
• Order by 11 am Pacific and in-stock parts ship the same day. After 11 am we can still ship the same day in some cases. Call (360) 661-0875 for a rush.
• Shows sold out? Call or use the fan identification form and we will give you a lead time or suggest an equivalent.
• Saturday delivery is possible in some cases. Call to arrange it.
• Shipping overages are refunded.

About Amphibious Marine

We sell Multiwing and Wing Fan fans and blades, and we specialize in fast fan repairs: blade cutting, balancing, replacement hubs and complete fans. When we don't have the exact part on hand, our fan design software lets us design a permanent or temporary replacement fan for time-critical applications, and we can often ship the same day. Amphibious Marine is an independent seller and is not affiliated with Multiwing or Wing Fan.