Cutting cutters compared

About 8% of HSS are produced today by powder metallurgy (P/M). This amount is steadily increasing, in particular in the field of cutting tools (gear cutter, endmills, taps, and broaches) [8.10]. More carbides can be added compared to conventional HSS and a finer particle size and more uniform distribution of the carbides can be achieved. However, the costs are still higher than for conventional tool steels, which retards a more general applicability [8.10]. 

Use of enzymes cutting rarely in mammalian genomes has a number of different effects, compared to the less selective (and therefore in some respects more general) route of partial digestion with Sau3A or non-CpG-containing hexanucleotlde cutters, due to the very nonrandom distribution of unmethylated CpG sequences in the mammalian genome. Such a nonrandom distribution of rare... 

As a further illustration, a sample of the cut obtained by the helix cutter, on both the bonded and cast-iron machines, shown in Fig. 1.26, is illustrated in Fig. 1.27, showing large width of cut at which the machine starts to chatter, as compared with the cast-iron machine. 

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