140 replies to this topic

[dr thrust]

well spotted ! yes they are designed for a bigger drum but i dont have one yet i just placed them there for artistic license/ posing

Edited by chris m, 12 April 2008 - 04:40 PM.

[phildunford]

Just for added Blue Peter value here's mine...

Thegreenman - Ball Mill

Worth saying that the large grey milling jar (which can do 600gm of BP at a time) weighs in at over 10kg with a full charge of lead balls, so would not want to go much bigger!

PS

Noticed there were some cheap Parvalux motors going on Ebay:-

Ebay - Craigs Engineering

Et al - Look suitable for ball mill or star roller

Edited by phildunford, 02 April 2008 - 09:19 AM.

[Arthur Brown]

Great find for anyone who wants to drive a drum directly.

[Pyrogeorge]

hi for that size of barrel you will need 20mm ceramic media, or 12 mm brass rod cut up,or 12mm to 20mm lead balls, but i suspect by the time you have filled the barrel with media/comp your tumbler will only handle one barrel comfortably! i know i bought a four barrel Joby and it struggles its b*lls off

thanks for your reply,but how many of lead balls must i use?i mean the capacity.thanks

Edited by pipipi, 10 August 2009 - 02:51 PM.

[dr thrust]

phew just come back from the lab.. ho, ok then shed and i have just measured how much brass 12mm rod media i have in my small milling jar which is 100mm id, 120mm long and it as 1.1 kg of media in it, this mills 100g batches very nicely, and seeing that you have a six pound machine 1.5 kg max but try 1.1 first to help with milling you can hot glue brass rod to the inside of your drum to get "lifter bars" these churn everything up

Edited by chris m, 03 April 2008 - 06:56 PM.

[phildunford]

I'm sure this has been said here before, but the 'rule of thumb' is that you should half fill your drum with media.

The amount of composition for a full charge is that which would quarter fill the drum.

I'm sure you can work out how much that is by some formula, but much easier to just fill it up until a ruler shows it's half full...

[Arthur Brown]

Pipipi it really is time for you to actually try to fill the mill and see how many balls it takes, and how much powder it takes.

[Pyrogeorge]

Pipipi it really is time for you to actually try to fill the mill and see how many balls it takes, and how much powder it takes.

Yes but to fill all the jar with media or half media and half powder?i don't understand your answer,sorry

[pudi.dk]

-Take your ball mill jar, pour media until it has half full per volume. That's how much media you should use.
-Pour out the media.
-Fill jar with powder until it is 1/4 full of powder per volume.
-Put media back into jar.
-Voila

[Pyrogeorge]

thanks!

[dr thrust]

hi heres a vid of the ball mill i constructed from page four of this thread, its my first ever video so bear with me on the dodgy commentary , homemade v rock tumbler

[portfire]

hi heres a vid of the ball mill i constructed from page four of this thread, its my first ever video so bear with me on the dodgy commentary , homemade v rock tumbler

Thats one sweeeet looking mill chris . I'm off to the carboot tomorrow lol.

By the looks of it it's turning at around the speed of mine, do you know the RPM of your jars. I didn't do the math (and still haven't) when i made mine, but it still kicks ass

Edited by portfire, 12 April 2008 - 05:26 PM.

[dr thrust]

thanks for the comment dean, no maths envoled just move the vee belt around the stepped pulleys until it "looks" wright

[portfire]

thanks for the comment dean, no maths envoled just move the vee belt around the stepped pulleys until it "looks" wright

That's similar to what I did, but I just increased the drive roller size

[dr thrust]

well dont be shy show us your mill dean, (and everybody else to !)