Hi Lou, by SDS adapter, do you mean our keyless chuck stock code V1280 or keyed version V1282?

You could use these on hammer drill mode although you will be limited to using 13mm standard TCT masonry drill bits, whereas using the SDS+ chuck on your drill you would be able to use larger diameter & longer SDS masonry drills. I would limit the size of masonry drill bits you use in the keyless chuck to <10mm as the chuck is only tightened by hand. I trust that this adequately answers your question?