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Dremel lathe

szbalogh

By szbalogh
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szbalogh Super WRT Addict

szbalogh

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Some of You asked about my Dremel "lathe". I will post my works here with this fine tool :)

To use the Dremel as a lathe please make sure that the bearings are in perfect condition! In addition, care must be taken no to push the tool to hard on the working piece, since the shaft is to long and thin. The tool can blunted ot the working piece can break or bend. Moreover, use only the low speed stage! The manual say it is around 15000 pm for my Dremel but I am sure its a way slower.

Here, i am turning a stem for an EB1197 movement:

This was my first documented try, see this video for a much better pice for HMT watch:

Today i got one crown for it so continued work on the EB1197 stem.

Thread was cut also on the Dremel holding (and pushing) the die with 3 fingers and turning the collet with my other hand:

2016-04-20 07.23.09.jpg

The Dremel is just tied with wire to a piece of iron beam. Between them are two wood pieces (one at the front and one at the end of the Dremel) with a half-circle cut to fit the two support points. Notice my adjustable T-rest! :)

2016-04-25 18.43.47.jpeg

Here i had to make a longer thread and shorten the length:

Just a bit more to cut down:

2016-04-25 18.42.22.jpeg

Using a set of collets You can see in the upper left corner. They are coming from an 8 pieces set ranging from 1 to 3.2 mm as i remember. Just search for "Dremel collet" on e-bay!

You have to check the Dremel shaft diameter since there are more available.

Just fits in the 1.8mm collet, the thread is tap7 (120 or M1.2x0.25).

2016-04-25 18.43.13left.jpg

It is important to note that the delicate front part has to made in one run, since the work piece wont be true after removing and putting back in the collet. But to cut down the length it does not matter. 

The length is perfect now, lets glue the crown and the stem together:

2016-04-25 18.51.45left.jpg

And of course it is working flawless :)

Ready to go:

2016-04-25 19.41.43.jpeg

Next time i will make a replacement dial feet holding screw for my Roskopf pocket watch.

 

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szbalogh Super WRT Addict

szbalogh

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Thank You Bobm12! Also will make a simple ER20 system lathe in the near future. With that i have much more possibilities. Like turning bigger parts for example crowns or staking set rods. I am half way to make a little "two center" lathe for pinion polishing. Stay tuned! ;)

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bobm12 Distinguished Member

bobm12

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Excellent SZ! Can I ask, what do you use and/or how do you make the tools to cut on the dremel lathe? I would assume they have to be of a certain shape and with quite and edge? Forgive my ignorance about lathes!

Cheers,

Bob

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szbalogh Super WRT Addict

szbalogh

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1 minute ago, bobm12 said:

Bob

The big square tool on in the video is a 3mm diameter HSS Co10 rod. Sadly i couldt find any square one. Hardness is around 70 HRC.

The small tool is a "Vinyl cutting Roland blade", These are tungsten carbide tips, excellent for hardened steel, but have to work slower with it since it breaks easy. Hardness is around 90 HRC.

http://www.ebay.com/itm/5-Pcs-30-45-60-Roland-Blades-Cricut-Cutting-Plotter-Vinyl-Cutter-Offset-Gcc-/331442278668?var=540617452215&_trksid=p2056016.m2516.l5255

The tip is not good for turning, it has to be shaped. I use this diamond disks for it:

http://www.ebay.com/itm/Hot-5-PCS-22mm-Emery-Diamond-cutting-blades-Drill-Bit-1-Mandrel-for-Dremel-NEW-/272150698231?&_trksid=p2056016.m2516.l5255

Using this collet for both tools, also excellent for screwhead polishing...

http://www.ebay.com/itm/DOUBLE-END-PIN-VISE-TONG-STEEL-WITH-2-REVERSIABLE-COLLETS-2450167-/272212383988?&_trksid=p2056016.m2516.l5255

Also have a 3mm diameter tungsten carbide rod, but didnt used yet. I will replace the HSS tool with it.

http://www.ebay.com/itm/3-12mm-K20-Tungsten-Carbide-100mm-Rod-Boring-Bar-Lathe-CNC-TOOL-MAKER-Endmill-AU-/121475845355?var=420413595861&_trksid=p2056016.m2516.l5255

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szbalogh Super WRT Addict

szbalogh

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Today i needed to make one dial feet holding screw for the Roskopf to try on the new domed glass a grinded. Started from a 3mm nail.

2016-05-28 13.21.42.jpeg

M1.2 thread since the previous screw (M0.9) was broken and had to push out. Roughly shaped upper part.

2016-05-28 13.54.49.jpeg

Nut cutting with my new "special file" :) an old broken pocket knife.

2016-05-28 14.18.32.jpeg

The new one on the right.

2016-05-28 14.25.18.jpeg

And finally i could put it all together after a bit dial feet adjustment.

2016-05-28 15.00.56.jpeg

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