SeaStar Wheel Adapter HB0573, 3/4 Inch Taper to 1 Inch Straight Shaft

The SeaStar HB0573 is a steering wheel shaft adapter that converts a 3/4 inch taper shaft to a 1 inch straight shaft, letting you mount a compatible steering wheel onto a helm pump or steering shaft with a different shaft profile than the wheel hub was originally sized for. It is used at the helm during a wheel swap or when pairing an aftermarket wheel with an existing SeaStar or BayStar mechanical or hydraulic steering system. The adapter is a precision-machined fitting designed to bridge the two shaft geometries so the wheel seats and locks securely without play. Because it is a dedicated hub adapter rather than a universal spacer, it is intended specifically for the 3/4 inch taper to 1 inch straight conversion, and it ships as a standalone component for installation with the wheel's existing mounting hardware. This part falls under helm pump and steering hardware and is identified by the part number HB0573.

Specifications

• Brand: SeaStar
• Manufacturer Part Number: HB0573
• Product Type: Adapter, 3/4 Inch Taper to 1 Inch Straight
• Category: Helm Pumps
• Weight: 0.2 pounds
• Package Dimensions: 10 x 9 x 8 inches
• UPC: 731957801432

Frequently Asked Questions

What does the SeaStar HB0573 adapter do? The HB0573 converts a 3/4 inch taper steering shaft to a 1 inch straight shaft so a steering wheel sized for one shaft profile can be mounted on the other.

What shaft sizes does the HB0573 fit? It adapts a 3/4 inch taper shaft to a 1 inch straight shaft, which is the specific conversion this part is designed for.

How much does the HB0573 adapter weigh? It weighs 0.2 pounds.

What are the package dimensions for the HB0573? The HB0573 ships in a package measuring 10 x 9 x 8 inches.

Is the HB0573 a genuine SeaStar part? Yes, HB0573 is the SeaStar manufacturer part number for this 3/4 inch taper to 1 inch straight shaft adapter.

What steering systems is this adapter used with? The HB0573 is used in helm pump and steering wheel installations, including SeaStar and BayStar steering setups, where the wheel hub and steering shaft have mismatched shaft profiles.

Does the HB0573 include mounting hardware? The HB0573 is the adapter component itself; it is installed using the steering wheel's existing mounting hardware.

What is the UPC for the SeaStar HB0573 adapter? The UPC for the HB0573 adapter is 731957801432.

Can the HB0573 be used to install a new steering wheel on an older helm? Yes, when the new wheel's hub is machined for a 1 inch straight shaft and the existing helm shaft is 3/4 inch taper, the HB0573 bridges that difference.

Is the HB0573 adapter reversible for other shaft combinations? No, the HB0573 is specifically machined for the 3/4 inch taper to 1 inch straight conversion, not other shaft size pairings.