used in the action an important aspect of the invention which not only facilitates the step of inserting the felt strip into the bushing holes but also contributes to the durability of the bearing over long periods of use is that the surface of the bushing felt which constitutes the outer surface of the felt cylinder is pre coated with a thin layer of heat sensitive glue 45 of a type that is dry i e is not tacky until subjected to heat in practice a relatively large roll of bushing cloth is thinly coated with this type of glue for example the 3424 felt heat seal commercially available from t h glennon co inc lawrence ma 01840 a water based glue containing 45 solids by weight the glue is spread onto the bushing cloth for example with a doctor blade in a film sufficiently thin that the natural nap of the fabric prevents complete glue coverage of the fabric a sheet of the bushing cloth having a thus applied dried film of glue on one surface thereof is then severed into strips as described above and the glue being dry the cloth is readily drawn through the bushing holes in the arms 41 and 42 at the same time the somewhat unsatisfactory previously used step of applying liquid glue to the bushing cloth as it is drawn through the bushing holes is eliminated although fig3 illustrates the strip being inserted into a single hammer shank in commercial practice a multiplicity of shanks are supported side by side and a relatively long strip of pre glued.