Worm cutting drums equipped with disk tools
KRAUZE K.

S u m m a r y
Repeated interesting of Polish hard coal mines in disk tools caused a development of the prototype design of worm cutting drums equipped with disks by Processing and Transportation Mining Machines Department of AGH and Zabrzanskie Mechanical Works S.A. Designs of the cutting drums of that design for coal and hard coal interlayer cutting were presented on the background of existing designs. Special attention was paid to a discussion of advantages and disadvantages of disk tools in comparison to the presently used cutting bits.