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Harold Hall

Metalworking

Workshop Projects

Adaptors are fitted to the files as shown in Photograph 33 enabling them to be easily fitted  and whilst there are just two types, one having a slot to accept flat files and the other with just a hole for round square and triangular files, the size of the slot or hole will have to be chosen to suit the file being fitted. Also, some shaping of the end of the file where it enters the adaptor is suggested, see SK. 2.

 

Each file will need to be positioned in the adaptor with some care so as to ensure that, with the limited adjustment available on the machine, it can be set to be parallel with the file's movement. Photograph 34 shows how the round file is being held in position on the lathe whilst the two-part resin adhesive being used sets. Other shapes will have to be held on the end of the tang, which maybe marginally less accurate but should still be sufficient.

The Files.

When applying the adhesive do not just place it in the hole and then press in the file as air pockets are likely to be trapped in the individual teeth reducing the strength of the final bond. Do therefore smear a very light coating of adhesive over the file's teeth prior to placing it. Using the supporting method illustrated in the Photograph will of course only allow one file to be fixed at a time.

 

With the file fixed in the adaptor then the tang can be removed using an angle grinder fitted with a thin disk or failing that the workshop off hand grinder and the end of the file generally tidied up.

 

Assembling the Filing Machine starts on the next page.

Filing Machine, adapted files for use on.
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33

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34

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