Kalsi machinery co presents model kmc 2500/3500 sewing master thread book with latest technology and function in india. These heavy-duty thread book-sewing machines are ideal for sewing of large size ledger books, registers and other long books. The thread book sewing machines are available with salient features like totally risk free; good accessibility to all structured units; zero maintenance; and provide excellent production. Some of the technical specifications like largest 560 x 225 mm [22" x 9"] book size; smallest 150 x 100 mm [6" x 4"] book; up to 70 sections per minute speed; and 0.75kw[1 hp] motor with1400 rpm.