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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2-4-803 end yoke
$31.04
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1310
2.560
2.000
1.62
2-4-433 end yoke
$29.61
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Step: 1
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1310
2.562
2.125
ROUND BORE
KEYWAY- 0.188
RB
KEYWAY LOCATION AT 12
2-4-1233 end yoke
$18.91
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Min: 1
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1310
2.562
2.125
ROUND BORE
KEYWAY- 0.375
RB
1.62
KEYWAY LOCATION AT 12
2-4-1103 end yoke
$25.37
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Min: 1
Step: 1
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1310
2.56
2.00
1.375
5-12111x
$43.88
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Min: 1
Step: 1
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1310
2.562
2.125
ROUND BORE
KEYWAY- 0.312
RB
KEYWAY LOCATION AT 12
10-4-373 end yoke
$16.69
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Min: 1
Step: 1
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1000
2.50
1.62
1.20
10-4-143 end yoke
$18.91
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Min: 1
Step: 1
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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.