211260X – Center Support Bearing – 1350/1410 Series – 1.574″ ID – 2.250″ Center Bearing To Base

211260X Center Support Bearing — 1350/1410 Series, 1.574" ID, 2.250" CL-to-Base

The 211260X (also referenced as 211260/X) is a center support bearing assembly for 1350 and 1410 series two-piece driveshafts. The bearing inner bore is 1.574 inches, which must match the midship stub shaft outer diameter exactly — the midship shaft passes through this bore and is retained by the bearing's inner race. The center bearing to base dimension is 2.250 inches, measured from the center of the bearing bore to the bottom of the rubber mount's base flange. The mounting hole center-to-center spacing is 6.625 inches, which must correspond to the spacing of the vehicle's frame crossmember mounting holes.

The Notes field for 211260X specifies it is similar to 210866-1X but without dust shields. The dust shields on 210866-1X protect the bearing from road debris; the 211260X relies on the rubber mount housing for protection. This distinction matters in applications with heavy debris exposure — if the original bearing (210866-1X or similar) had dust shields, confirm whether the deletion of dust shields is acceptable for your operating environment before substituting 211260X. The 1350 and 1410 series designations confirm the U-joint series at each end of the midship shaft: both series use a 1.188-inch U-joint cap diameter at 1350 and 1.188-inch at 1410, with the 1410 being wider overall. The center support bearing itself is selected by bearing ID and mount dimensions, not U-joint series alone — always verify the 1.574-inch bore against the measured stub shaft OD.

Specifications

• Part Number: 211260X
• Application: 1350, 1410 series driveshafts
• Bearing ID: 1.574"
• Center Bearing to Base: 2.250"
• Mounting Hole Center-to-Center: 6.625"
• Notes: Similar to 210866-1X, without dust shields

Fitment & Installation Notes

Before ordering 211260X, measure three dimensions: the midship stub shaft OD (must be 1.574"), the frame bracket mounting hole center-to-center spacing (must be 6.625"), and the required center-to-base height (must be 2.250" from bearing centerline to mount base). Even 0.010 inches of clearance between the 1.574-inch bearing bore and the stub shaft OD will allow the shaft to orbit at speed, causing vibration and accelerated bearing wear. A mounting hole spacing mismatch will require bracket modification or result in an angled bearing installation that loads the rubber mount in tension rather than compression — shortening mount life significantly.

The 211260X center support bearing is catalogued for 1350 and 1410 series applications, which are common in 3/4-ton and 1-ton truck two-piece driveshaft configurations. The rubber mount provides vibration isolation between the rotating assembly and the frame; inspect the rubber for cracking and hardening at every driveshaft service. A failed rubber mount allows the bearing housing to rock, which causes the midship stub shaft to run off-axis and generates vibration that mimics out-of-balance conditions.

Install the 211260X with the bearing housing seated squarely on the frame bracket mounting face. Torque mounting hardware to specification. Verify the driveshaft runs true at the bearing bore location before torquing final — a slight rearward or forward adjustment of the bracket position may be needed to align the bearing with the stub shaft centerline. Do not use the mounting bolts to pull the bearing housing into alignment; the rubber mount must be unstressed at ride height.

Explore related center support bearing assemblies including variants with dust shields and alternative mounting hole spacings for 1350 and 1410 series applications.