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Drilling is an operation performed by a rotary end cutting tool with one or more cutting edges and usually one or more flutes for the passage of chips and cutting fluid. Holes drilled by this process are limited by the available drill sizes. The table below provides the tolerances of the holes produced by some of these drills. These tolerances are often adequate without further machining operations, such as reaming or boring. Here location also can add significantly to production cost. As shown in Fig. 2, the tolerance on hole locations can affect the process, which in turn has significant cost effects. Deep hole drilling is also a factor affecting cost. Fig. 1 shows how cost increases as the ratio of length to diameter goes beyond 3 to 1.

These reference sequences are curated independently of the genome annotation cycle, so their versions may not match the RefSeq versions in the current genome build. Identify version mismatches by comparing the version of the RefSeq in this section to the one reported in Genomic regions, transcripts, and products above.

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Genomic Sequence: NC_000071.7 Chromosome 5 Reference GRCm39 C57BL/6J NC_000071.6 Chromosome 5 Reference GRCm38.p6 C57BL/6J

This section includes genomic Reference Sequences (RefSeqs) from all assemblies on which this gene is annotated, such as RefSeqs for chromosomes and scaffolds (contigs) from both reference and alternate assemblies. Model RNAs and proteins are also reported here.