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PostPosted: Tue Feb 24, 2009 9:38 pm 
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Joined: Sun Dec 16, 2007 12:41 pm
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Location: Palo Alto, CA
I just finished up a batch of 8-32 brass knruled thumbscrews on my little Rambold turret lathe, and I'm putting together an article for HomeShopTech on the process.

Image

Meanwhile, I also tested out the movie function on my camera for the first time and posted a small video on YouTube. I ran the camera on a tripod and basically reached around it to do the lathe work.

I hadn't even considered that the camera would also record sound, so the background music was what I had on in the shop at the time.

Enjoy:
Rambold's Further Adventures

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Frank Ford
HomeShopTech


Last edited by Frank Ford on Wed Feb 25, 2009 1:31 pm, edited 2 times in total.

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PostPosted: Tue Feb 24, 2009 10:06 pm 
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Joined: Sun Apr 15, 2007 9:23 am
Posts: 5282
Location: Florida
Hello Frank,

I've been pondering a bar puller for use with my turrett.

I have six stations and only use five, so a puller would fit right in. The next station after the puller would be the indexing stop to push it back to the proper length.

Edit:
For that matter, there is no reason a simple adjustale bar puller jaw could not be incorporated into the index stop.

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Glenn

Operating machines is perfectly safe......until you forget how dangerous it really is!


Last edited by Glenn Wegman on Wed Feb 25, 2009 8:39 am, edited 1 time in total.

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PostPosted: Tue Feb 24, 2009 11:56 pm 
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Location: New England
Hello Frank:

Can you tell me (us) about the device used in the video to thread the screws?

Thanks,

Rick


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 Post subject: Lathe
PostPosted: Wed Feb 25, 2009 12:02 am 
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Joined: Wed Feb 21, 2007 9:21 pm
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Location: Vallejo California
Awesome little lathe Frank !!

Almost a mini CNC 8)

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Retired journeyman machinist and 3D CAD mechanical designer - hobbyist - grandpa


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PostPosted: Wed Feb 25, 2009 11:18 am 
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Location: Holland MI
I'm sure I'll never be able to justify/afford the automatic thread chaser thingy.

I am interested in the tool that cut the OD of the area to be threaded to size in one pass. I think I've heard of them but can't think what they are called or how they are made.

Paul


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PostPosted: Wed Feb 25, 2009 11:25 am 
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This is exciting new stuff for me. I bought the die head off eBay some months ago, and this is the first time I've used it, or seen one in use. It's pretty intuitive to set up, so I'm sure to use it more in the future.

The head contains four full form thread cutting inserts, each of which have about a half inch of threads on them. Theoretically, you need a set of inserts for each thread pitch and diameter, but there is a fair range of diameter adjustment. On the next job I cut 6-32 threads with the same 8-32 jaws.

I'll have bigger pix on the HomeShopTech site soon, but here are some previews:

First, you close the head to the cutting diameter, by moving the red knob, bringing in the jaws:


Image

Here's the head, ready to cut:

Image

I have my hand behind the head to press it forward, simulating its action at the end of the cut when the turret has hit its end stop and the front of the head springs forward a bit, like this, opening the jaws to clear them for retracting the head:

Image

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Frank Ford
HomeShopTech


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PostPosted: Thu Feb 26, 2009 9:37 pm 
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Joined: Mon Jun 18, 2007 10:33 am
Posts: 504
Location: Taylorsville Ky USA
Frank, your having to much fun. I thnk I am going to have to come out there and help you.

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PostPosted: Wed Mar 04, 2009 5:42 pm 
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For those interested, I just put together a little article for my Web site, detailing the tooling and operation:

http://www.frets.com/HomeShopTech/Produ ... crews.html

Image

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Frank Ford
HomeShopTech


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PostPosted: Wed Mar 04, 2009 5:51 pm 
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Joined: Sun Apr 15, 2007 9:23 am
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Location: Florida
Good stuff Frank!!

Thanks for posting it :wink:

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Glenn

Operating machines is perfectly safe......until you forget how dangerous it really is!


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 Post subject: Awesome!
PostPosted: Wed Mar 04, 2009 7:02 pm 
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Location: Vallejo California
Frank, you're the man! 8)

Amazes me the amount of creativity that you posess :shock:

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Retired journeyman machinist and 3D CAD mechanical designer - hobbyist - grandpa


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PostPosted: Mon Mar 09, 2009 9:55 am 
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Location: Holland MI
Thanks for the close up shots on the webpage. I can see how you did that tool to cut the major diameter in one go. Old hat for some but I had not seen that anywhere before. If I can duplicate that thing in a couple sizes it could be very handy for making small screws for the steam locomotive I've (very slowly) building.

Paul


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