Gallery, Projects and General > How to's
Threading by hand
Bernd:
--- Quote from: mklotz on June 17, 2010, 12:14:25 PM ---Finally, you can often turn a small section of the workpiece end down to a diameter that just slides into the die. This will help the die to align and guide the cut. After the thread is formed, the guide tenon can be cut off.
--- End quote ---
Never thought of that. Neat little trick Marv.
Bernd
Dean W:
Hi Wong;
The instructions for your thread cutting accessory are at this link:
http://www.sherline.com/3100inst.htm
For what you are doing, and obviously the piece is pretty small, using a die in a die stock will get it done well,
and in just a few minutes. If you can take about an hour to make a die stock to hold your dies, you'll have a
tool you can use for years to come. It will start dies straight enough for most purposes.
A fellow named Arnold made up a set of them described in this thread:
http://www.homemodelenginemachinist.com/index.php?topic=6368.0
You will only need one at the moment, and if you always buy the same OD dies, that will be all you ever need.
Otherwise, just use a die wrench and push on it from the back side with the tailstock chuck as has already been
described here. Pay heed to Marv's advice about starting the die from the correct side.
Good luck.
Dean
wongster:
Thanks guys.
Dean, I've the sherline instruction. Someone did post step by step pics and described his "boo-boo" when following the written instruction. Trying to remember the site to avoid the same mistakes.
I'll definitely make a die holder.ore convenient than to setup the thread cutting attachment.
Regards,
Wong
wongster:
I managed to install Sherline's Thread Cutting Attachment but encountered a problem right after the first pass (0.25mm). A little pin on the attachment snapped on the 2nd pass of the same depth. I was scratching my head thinking what's going on with this threading business. I found the snapped off pin and measured its diameter to be around 2.5mm. Found a pin of almost the same size (2.3mm) from the pile of salvaged printer/scanner parts. Hammered in the pin and trimmed off the excess. I'm back in business. The thread was done without further problem and I've my first threaded part!!!
I've taken some pics and posted them here. The threads are not that nice looking but it threaded into the torch body without problem.
I've bought some 40mm aluminum stock today. Will try to make the die holder as it is more convenient than having to install the Thread Cutting Attachment and remove the motor to the spindle everytime I need to cut thread.
Thanks for all your help rendered so far.
Regards,
Wong
Dean W:
Congratulations, Wong!
Threading seems to be one of the machinist stepping stones. You're a step higher!
Dean
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