FRAME: To ensure rigidity and accurate alignment to the complete assembly and to, unsure against vibrations and detractions, cast iron side walls having large dimensions and cross section, properly ribbed at critical places are provided. Except for side walls and all other parts are steel fabricated. TABLE: Steel fabricated, box type table is heavily ribbed for strength and is stress relived, Its machined seat provides true and firm support to the bottom blade. It is adjustable for setting the blade clearance. The top surface of the table is provided with T slots for adjusting the front guage. UPPER BEAM: Upper beam is fabricated with thick M. S. plate. It is heavily ribbed from behind and is stress relieved. The top blade is fitted at its accurately machined seat, its sliding surface are machined and hand scrapped for smooth travel and sustained accurately.