polishing spindle taper threads

[clogsParticipant @clogs]

[clogsParticipant @clogs]

Hi out there……

Decided to treat myself to a 30mm dia polishing spindle…..

I have the shaft and bearings and a good friend just donated a 3hp, 3phase motor….

so need to make the tapered threads, any idea's or just taper the shaft and

cut the threads by hand…drudgery…..??

many thanks Frank in France…

[JasonBModerator @jasonb]

Was discussed a while ago in this thread

[jacques maurelParticipant @jacquesmaurel42310]

Look at this video:http://www.youtube.com/watch?v=I57FCsvUajg

[John HaineParticipant @johnhaine32865]

Convert your lathe to cnc, then it's a doddle….

(ducks the brickbats…)

[_Paul_Participant @_paul_]

This youtube video shows "Doubleboost" making a taper spindle

[_Paul_Participant @_paul_]

And part two.

[clogsParticipant @clogs]

HI again,

I did try the search function on the forum, sorry I wasted ur time……

Very pleased with the results tho…….quite liked the thread cutting arrangement on the u tube video….

yes I know I'm sad…hahaha…

thanks again..Frank in France……..just started the learning curve……

[Douglas JohnstonParticipant @douglasjohnston98463]

What a wonderful video, I loved the accent and the use of descriptive language when things went wrong at the end.

Doug

[Nick_GParticipant @nick_g]

Posted by Douglas Johnston on 02/09/2014 09:15:16:

and the use of descriptive language when things went wrong at the end.

Doug

That was quite tame for him.!

Nick

[Jon GibbsParticipant @jongibbs59756]

The thread Jason linked to was started by me.

I've since managed to turn a pretty reasonable pigtail mandrel using a neat little gizmo from a Hemingway Kit …

**LINK**

It's made it an expensive and time consuming solution but it's very satisfying when you eventually get there.

I turned the taper and cut the thread with the same effective tailstock offset (approx 8mm) but to get a steep enough taper it was only possible to cut it on a short section of stock which was then screwed onto a mandrel with a threaded nose.

I'll try to post some pics.

Jon

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