mandrel m fully retracted within the nose piece 14 of the puller 12 the end portion 25 of the mandrel m has been moved entirely through the tubular section 30 as a result the puller 12 and mandrel m are freely movable away from the installed bushing 26 28 fig8 shows an axial space 48 starting to form between side surface 44 of member 40 and end surface 16 of nose piece 14 it further shows the bushing parts 26 28 installed within the opening 18 the installed bushing parts 26 28 are also shown in fig1 with the puller 12 having been moved away from the work member 40 following its installation the inside surface of the tubular section 30 might be slightly tapered in that case the opening in tubular section 30 may be reamed to a desired inside diameter and to remove lubricant residual the lubricant residual may be present because it is common practice to use a lubricant between a mandrel m and a bushing through which the mandrel m is moved movement of the mandrel m through the bushing 25 expands the tubular section 30 beyond elastic expansion and into plastic expansion that is the material is expanded a sufficient amount that it will assume and retain a new diameter fig3 9 and 13 show another form of two part bushing 50 a first bushing part 52 has a tubular section 54 and a radial flange section 56 at one end of the tubular section 54 as shown by fig9 and 13 the tubular section 54 has an outside diameter substantially conforming to the opening 38 in the work member 40 tubular section 54 has a length measured from the inside of flange section 56 to its opposite.