While Rapidshare is no longer active, you can find Principles of Machine Tools by G.C. Sen and Amitabha Bhattacharya
If you're looking for free open educational resources on machine tools, I can point you to legitimate free materials from NPTEL (Indian government initiative), MIT OpenCourseWare, or similar. While Rapidshare is no longer active, you can
Used Book RetailersBecause this is a classic textbook that has been in print for a long time, there are thousands of used physical copies circulating worldwide. Websites specializing in used books often sell older editions of academic textbooks for a fraction of their original retail price. Buying a used physical copy is legal, safe, and gives you a permanent reference guide for your professional shelf. Is the book available in other formats
The search for a digital copy of the classic 976-page treatise Principles of Machine Tools by and Amitabha Bhattacharyya While Rapidshare is no longer active