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Pins in through holes can be driven out by several blows onto a drift (of a nominal diameter somewhat smaller than that of the pin). Apply the blows in the opposite direction of driving in the pin. Make sure that there is a larger hole in the support through which the pin can slip.
Figure 24 Undoing a pinned
joint with a drift
Pins that are flush with the surface of the workpiece and have seized up or pins in blind bores must be removed by drilling. Use a drill of the nominal diameter of the pin.
Figure 25 Removing pins
with a drill
To remove grooved drive studs, apply a flat chisel sideways between the head of the grooved drive stud and the surface of the component part, and by a few hammer blows, lift the drive stud and remove it with a pair of tongs.
Figure 26 Undoing a grooved
drive stud joint
When you remove pins from joints, make sure always to place the joint on a pad or other support that will not slip.
How can you remove a pin from a through
hole?
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