Hemingway rear tool post plunger thread?

Hemingway rear tool post plunger thread?

This topic has 4 replies, 3 voices, and was last updated 6 November 2020 at 18:40 by Jak2g.

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6 November 2020 at 17:58 #505635
Jak2g
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@jak2g
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!
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6 November 2020 at 17:58 #20013
Jak2g
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@jak2g
6 November 2020 at 18:11 #505639
Peter Spink
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@peterspink21088
Yup, there's a threaded plug with a screwdriver slot which stops the spring and plunger falling out
6 November 2020 at 18:11 #505640
Dave Shield 1
Participant
@daveshield1
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
6 November 2020 at 18:40 #505647
Jak2g
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@jak2g
Should have went with my gut. Thanks all.
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