Threading on a lathe when you cannot set up 29.5 degree compound

[Chipper5783]

Reminds me of a Breville (sp?) spring.


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No - a Belleville washer is a type of spring (it is of constant thickness, just slightly conical). What I made is a simple washer with a raised face rim at the outer 30%.

 

[Shiseiji]

And just in time for yet another opinion, Winky's Workshop: Threading - Feeding with the Cross slide vs Compound

and an interesting graphic demonstrating how 29 degree setting minimizes cutting on both sides. That said, from a number of posts I've read, straight in threading is quite common in England. Covered in detail in Workshop Practice book 3 Screwcutting In The Lathe By Martin Cleeve.

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[VicHobbyGuy]

That said, from a number of posts I've read, straight in threading is quite common in England. Covered in detail in Workshop Practice book 3 Screwcutting In The Lathe By Martin Cleeve.

Yes - Pg 136 onward in my copy of the Cleeve book.
The 'straight-in' technique is called 'Method 1' and Cleeve devotes 16 lines to it before going on to Method 2 (advancing compound) and Method 3 (combined advancement of compound and cross slide, compound set parallel to lathe axis). He devotes almost 3 pages to Methods 2 & 3. About Method 1, he has only negative comments.

 

[Shiseiji]

Yes, my bad for only thinking about #3. Glad you cleared it up.

 

[VicHobbyGuy]

Yes, my bad for only thinking about #3.

I've used that method of setting the compound parallel to the lathe axis when trying to 'pick up a thread' - usually after making a mistake.

 

[Shiseiji]

I've used that method of setting the compound parallel to the lathe axis when trying to 'pick up a thread' - usually after making a mistake.

Guilty as charged