3R26-40 – Weld Yokes – 3R Series – Butt Dia 3.875″ – Tube Dia Wall 4.000X0.065

Purpose-Built for Driveshaft Driveshaft Builds

When you are fabricating or rebuilding a propshaft for a driveshaft platform, the yoke-to-tube weld joint is the most critical structural connection in the assembly. The 3R26-40 weld yoke delivers a precision-bored butt diameter of 3.875" to match standard 4.000" OD tubing at 0.065" wall thickness, giving you a tight-fitting joint that welds cleanly and balances predictably.

Key Specifications at a Glance

Why the Tube-to-Yoke Fit Matters

• A properly fitted weld yoke eliminates weld gap variation that causes runout after cooling.
• Full-penetration welds require consistent clearance -- ideally 0.003-0.005" radial gap.
• Insufficient tube wall engagement reduces fatigue life under torsional cycling.
• This yoke's bore is held to close machining tolerance for repeatable fitment.

Material Performance

Heat-treated steel construction delivers the torsional rigidity required for heavy-duty propshaft applications, resisting deflection under load. The 3R series designation ensures this yoke is dimensionally matched to standard 3R u-joint crosses -- no shimming or adapting required.

Ordering & Pairing Guidance

Order this yoke alongside a matching 3R series u-joint cross and the appropriate companion flange or slip yoke for your specific driveshaft layout. Confirm your tube OD and wall before placing the order -- substituting a different tube size will result in a loose or interference fit that compromises weld quality and structural integrity.