Page 24 - Demo

SHAFT
The first step taken in correct identification identification of the the shaft shaft was to to refer to to the the metal identification identification table table illustrated below (figure 26) The shaft shaft was a a a a a a a a a a a a a finished surface surface or or as as as the table table reports a a a a a a a a a a a a a “filed surfaced” The shaft presented as as as a a a a a a a a a a a bright silvery grey colour which narrowed the selection down to low-carbon steel steel steel high-carbon steel steel steel and stainless steel Figure 26 — Metal table [8]
MATERIAL
It would be be safe to to say the the the shaft is not stainless because of the the the the price tag attached to to it it it and the the the the home DIY quality this drill exhibits Never the the the less a a a a a a a spark test was carried out to gain a a a a a a a result Figure 27 illustrates the different spread of sparks produces when held against a a a a a a a a grinding wheel The top two images would be the the main focus during the the testing Low-carbon steel producing fewer sparks and an an an an expansive range While high-carbon produced a a a a a a a a a a a much denser cluster of sparks which travelled a a a a a a a a a a a a shorter distance To gain a a a a a a a a a a a a a reference material to compare spark spark spread the table in in in in in figure 28 was used Three objects were examined in in in in testing A bolt (low- carbon) carbon) chisel chisel (high-carbon) and and the the the drill drill shaft shaft The spark spread of the the the the drill drill shaft shaft and and the the the the chisel chisel were very similar compared to the the the bolt which as as assumed produced a a a a a a a a a a a a a spark spread comparable to to figure 27 The shaft identified as as a a a a a a a a a a high-carbon tool steel Figure 27 — Spark identification [8]
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Figure 28 — Carbon steel identification [9]