Handi Quilter HQ Stitch 510. Akin to the popular Janome HD9, Handi Quilter’s HQ Stitch 510 brings a very powerful heavy-duty contender to the market. Used in professional applications, this heavy duty machine will make easy work out of difficult projects. HQ Stitch 510 is the sweet spot between domestic and industrial machines. 1,600 precision stitches per minute. Powerful, high-speed straight stitch. 9? X 5.5? Workspace. The HQ Stitch 510 is a must-have for every serious quilter. This powerful, high-speed straight stitch machine boasts a nearly 9? X 6? Workspace, stitching speeds up to 1,600 stitches-per-minute (SPM), an automatic thread cutter, an easy needle threader, and an ergonomic knee presser-foot lift. 26 × 18 × 15 in.