Double U-Joint 1"DD X 11/16-36 Spline Steel Finish - Borgeson

The Borgeson Steel Double Steering Universal Joint (Part # 025225) is a heavy-duty, industrial-grade mechanical coupling engineered to solve severe steering shaft alignment issues in custom street rods, lifted trucks, and unique chassis conversions. Standard single universal joints are strictly limited in their articulation limits, but this double-joint assembly utilizes two interconnected needle-bearing pivots to smoothly transfer steering wheel force across extreme firewalls and frame contours.

70-Degree Articulation & Compound Geometry

• Extreme Angle Capability: While a standard single u-joint binds or locks up when pushed past 35 degrees, this double-joint design smoothly negotiates angles up to 70 degrees. This makes it essential for tight engine bays where steering shafts must wrap around large exhaust headers, structural crossmembers, or custom motor mounts.

• Premium Needle-Bearing Action: Built with precision-ground needle bearings that eliminate slop, backlash, and mechanical friction, delivering a tight, crisp, and safe steering feel.

• Rugged All-Steel Construction: Machined from high-tensile solid steel and finished in a raw steel finish, allowing fabricators to achieve maximum structural reliability along the primary steering column pathway.

Input & Output Shaft Interfaces

• Side A: 1" Double D (DD): Designed to slide directly over a standard 1-inch DD profile steering shaft. The flat dual-sided design prevents shaft slippage under high steering loads.

• Side B: 11/16"-36 Spline: Precision-broached to match an 11/16-inch diameter shaft equipped with a 36-spline configuration, a very common layout on early manual steering boxes and vintage steering columns.

Technical Specification Matrix

⚠️ Critical Fabrication Tech Tip: Using a double universal joint in combination with another single universal joint anywhere else along the line creates a three-joint steering system. Because three pivot centers exist, the intermediate steering shaft will loop, flex, and bind under load. To prevent catastrophic steering failure, a dedicated shaft support bearing is strictly required to keep the intermediate shaft rigidly stabilized.