Abstract: Disclosed is an apparatus for cutting elongated tubular material into short individual sections. The apparatus comprises a plurality of circular knives fixedly mounted in spaced relationship to each other along the axis of a non-rotating shaft. Rotatable spacing discs having a diameter slightly greater than the diameter of the knives are mounted one on each end of the knife-carrying shaft and are adapted to engage the bare end portions of a rotatable mandrel having a tube to be cut thereon when the knives are moved into cutting engagement with the tube. The rotatable spacing discs riding on the rotatable tube-carrying mandrel prevent the knives from cutting completely through the tube wall and make possible the retention of very thin, frangible, residual tube wall sections of precise constant thickness at the locations of the cuts. This allows the tube to be removed from the mandrel in one piece and then broken later, if desired, into individual short sections by hand or machine.