A round bore end yoke mounts on a plain shaft and takes its drive from a key rather than from splines. It appears on PTO drives, industrial equipment and older applications.
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Pic | Add | Part # | Series | Cj to End | Hub Dia | Splines Count | Splines Dia | Style | Through hole | Brand | Notes |
|---|---|---|---|---|---|---|---|---|---|---|---|
 | 1310 | 2.560 | 2.000 | 1.62 | |||||||
 | 1310 | 2.562 | 2.125 | ROUND BORE | KEYWAY- 0.188 | RB | KEYWAY LOCATION AT 12 | ||||
 | 1310 | 2.562 | 2.125 | ROUND BORE | KEYWAY- 0.375 | RB | 1.62 | KEYWAY LOCATION AT 12 | |||
 | 1310 | 2.56 | 2.00 | 1.375 | |||||||
 | 1310 | 2.562 | 2.125 | ROUND BORE | KEYWAY- 0.312 | RB | KEYWAY LOCATION AT 12 | ||||
 | 1000 | 2.50 | 1.62 | 1.20 | |||||||
 | 1000 | 2.50 | 2.25 | N/A | ISR | UDS |
Order by bore diameter and keyway size together. A round bore that fits the shaft but has the wrong keyway will not transmit torque safely.
Where a splined yoke shares load across every spline, a round bore yoke concentrates it on a single key. That makes the key and keyway dimensions as important as the bore itself, and it is why these yokes are usually specified for lower-speed industrial and PTO drives rather than high-torque automotive drivelines.
Measure the shaft diameter and the keyway width and depth before ordering. If the yoke is also clamped or pinned, note that as well.
