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Hemingway rear tool post plunger thread?

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Jak2g06/11/2020 17:58:43
40 forum posts
12 photos

Hello everyone

I'm a beginner when it comes to interpreting technical drawings (and machining) so my apologies if this is a stupid question.

I am currently working on the hemingway kits rear tool post. The base casting has a hole for the plunger, and it appears to me that the bottom of the hole is M8 and threaded. I can't for the life of me figure out why it is threaded, or what is inserted into this thread. I presumed the plunger spring went into the bottom of the casting, and was kept in place by virtue of the fact that the casting sits on the cross feed table, but I am now wondering whether something is threaded into the hole to stop the spring dropping out if you remove the tool post form the table.

Any assistance would be greatly appreciated.

Thanks!

Peter Spink06/11/2020 18:11:31
avatar
126 forum posts
48 photos

Yup, there's a threaded plug with a screwdriver slot which stops the spring and plunger falling out smiley

Dave Shield 106/11/2020 18:11:43
33 forum posts
6 photos

You have answered your own question, screw a slug into the threaded hole and it saves you buying a new spring every time you remove the tool post. You will remove the tool post more times than you expect to.

Cheers

Jak2g06/11/2020 18:40:55
40 forum posts
12 photos

Should have went with my gut. Thanks all.

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