letz burr mill smokstak antique engine community. jan 03 2003 hit miss and gas engine discussion. antique engine archives. letz burr mill. thread starter john w start date jan 1 2003 j. john w guest. jan 1 2003 1 just aquired a letz burr mill model 111x. seems to be in decent working condition but needs lots of,working principle of a burrmill,the french burr mill-stone, so justly esteemed as the best material for forming mill-stones for grinding bread-corn, having the property of... more details get price. principles of working and construction of i.c. engine. energy requirement, kicks law and rittingers law, roller mill, burr mill and hammer mill.