These inserts fit into the 50mm Axminster SK100 O’Donnell Dovetail Jaws. Held in place by 4 cap screws they are relatively quick to fit. The 25mm inserts change the gripping range of the 50mm jaw to that of the 25mm O’Donnell Jaw, the 38mm inserts change the gripping range of the 50mm Jaw to that of the 38mm O’Donnell Jaw.
The 25mm insert expands into a 35mm dovetail recess and contracts into a 21mm Dovetail or a 16mm spigot and the 38mm insert expands into a 50mm dovetail recess and contracts into a 35mm dovetail or 28mm Spigot.
When using the 25mm Dovetail Jaw insert, the range of movement of the Axminster chuck offers an external grip between 30mm and 46mm, internal dovetail 18mm to 34mm and spigot 11mm to 24mm. Whilst using the 38mm Dovetail Jaw Insert, the range of movement of the Axminster chuck offers an external grip between 46mm and 60mm, internal dovetail 34mm to 51mm and spigot 24mm to 36mm. Both of these can only be used in conjunction with the 50mm O’Donnell jaws. Made from stainless steel to protect against corrosion.