3R26-31 – Weld Yokes – 3R Series – Butt Dia 2.874″ – Tube Dia Wall 3.000X0.065

Precision Weld Yoke 3R26-31 -- Engineered for 3R Series Driveshafts

Universal Driveshafts' 3R26-31 weld yoke is a production-quality component for 3R series propshaft assembly. The 2.874" butt diameter is bored to accept 3.000" OD tubing at 0.065" wall, providing the controlled clearance needed for a full-penetration circumferential weld. The 1.750"" center-to-weld dimension aligns with industry-standard 3R driveshaft geometry used on driveshaft vehicles.

Complete Dimensions

Why Material Choice Matters at the Weld Joint

Heat-treated steel construction delivers the torsional rigidity required for heavy-duty propshaft applications, resisting deflection under load. The yoke ears are machined to series-standard cap pocket dimensions -- the 3R series uses a -- cap diameter -- ensuring that standard u-joint crosses seat flush with no shimming.

Application & Fitment Guidance

The 3R series is the standard u-joint specification for driveshaft driveshaft applications. This weld yoke is compatible with any shaft built to that series standard. Confirm the following before installation:

• Tube OD is 3.000" -- measure with calipers, not a ruler.
• Tube wall is 0.065" -- thinner walls require reduced heat input to avoid burn-through.
• Companion u-joint is a 3R series cross.
• Companion yoke or flange at the opposite end is also 3R series.

Post-Weld Quality Check

Inspect the weld toe for undercut and lack-of-fusion defects. Rotate the shaft in V-blocks and measure TIR at the u-joint seat; values above 0.005" require correction before dynamic balancing. Balance the completed assembly per your vehicle's balance spec -- typically 0.20-0.25 oz-in for passenger car applications, tighter for performance builds.