6.5-28-117 Weld Tube Yoke 1810 Series , Fits: 4.500 x 0.134 Tube With Butt diameter 4.234 inch Center Line to Weld 3.375

The 6.5-28-117 fits the same 4.500" OD tube as the 6.5-28-127 but at 0.134" wall versus 0.259" -- almost half the wall thickness. The butt diameter increases proportionally: 4.234" versus 3.984" on the heavier-wall variant. The two yokes share the same 3.375" CL-to-weld geometry, which confirms the 1810-series U-joint position is identical regardless of which tube wall is used. This dimensional consistency simplifies shaft fabrication when wall thickness must be changed mid-project for weight or availability reasons.

• 4.500" x 0.134" tube -- lighter wall than 6.5-28-127; lower weight, less impact resistance, same OD-based critical speed rating
• 4.234" butt diameter -- 0.250" larger than the heavy-wall variant; tube prep is wall-specific; do not interchange butt in wrong tube
• 3.375" CL-to-weld -- same as 6.5-28-127; weld station fixturing is interchangeable between variants
• 1810-series U-joint required; this series has the largest cap dimensions in the standard Spicer on-highway catalog
• Complete the assembly with an 1810-series end yoke at the axle for full series capacity

The 4.500" tube at 0.134" wall provides a favorable stiffness-to-weight ratio for long commercial driveshafts where critical speed is the limiting factor. The large diameter raises the critical speed significantly versus a smaller-diameter heavy-wall tube of equal weight -- an important consideration for multi-piece shafts with spans exceeding 60 inches.