The New Zealand Railways Magazine, Volume 2, Issue 6 (October 1, 1927)
“Blacksmith” writes as follows:—
Having had considerable experience in dressing various kinds of tools I have frequently noticed that the cold sets used on the permanent way are in many cases returned chipped and broken soon after being sent out dressed.
The remark is often made that the blacksmith has not much knowledge of tempering tools, whereas the fault lies more often with those who use them.
I would suggest that users of cold sets (more especially on cold days) take the chill out of the tools by applying a torch to them for a few seconds-or by holding them over a fire, if near one.
We blacksmiths always give our steam hammer tools a warm before using them (and we are under cover) to lessen their chances of breaking.
If such a suggestion is carried out I consider that it would effect a great saving in time, labour and materials.page break