How to slow down your Nat Geo Tumbler for cheap!

Рет қаралды 2,418

Rock On Utah

Күн бұрын

Пікірлер: 26

@susanpenrod3162 10 ай бұрын

Thank you for this, I just ordered one. Can’t wait to try it.

@RockOnUtah 10 ай бұрын

You're welcome! Thanks for watching!

@bruceboatner3877 4 ай бұрын

Thanks for this great tip. I'm now using your idea on 4 of my Komestone tumblers. Experimenting, I found that: 1) They will run at 7.5V and above, but not 6V and below. 2) They previously ran at 84 RPM on the slowest speed and 105 RPM on the highest. On 7.5V they run now at 50, 60 and 70 RPM. Also, they only draw 6W, so the smallest (& cheapest) 12W adjustable DC power supply will work.

@RockOnUtah 4 ай бұрын

Yep! Mine are still going strong without overheating (which theoretically is possible) even in a room that's been 100 degrees for 3 months.

@michaelc6817 4 ай бұрын

Thanks for testing this and posting it. I just ordered one, so I can slow down for stages 3 and 4.

@RockOnUtah 4 ай бұрын

Thanks for watching and good luck!

@stiaininbeglan3844 9 ай бұрын

Thank you! I was thinking about, like, changing the gear size, but I couldn't remember if that would actually work the way I wanted it to, and I was actually looking for different sized gear sets and came across your video. 🤦 I totally should have known I could just get an adjustable voltage adapter. I guess I just thought they didn't make them anymore.

@RockOnUtah 9 ай бұрын

Glad I could help!

@maxthomas86 10 ай бұрын

Such a useful video, thank you

@RockOnUtah 10 ай бұрын

You're welcome! Thanks for watching

@charlottepahline5000 3 ай бұрын

This is so helpful, I was just looking up pulley replacement parts and found your video! Thank you for posting!

@RockOnUtah 3 ай бұрын

Thanks for watching!

@SirUlrichVonHamburglar 8 ай бұрын

Nice vid. I save every power pack I come across. Just ran to my stash and boom the 2nd one I pick up was 6v/2amp with the correct plug already on it. Worked perfectly. Now maybe my rocks won't be so bruised and fractured looking and I can start to get a shine I hope.

@RockOnUtah 8 ай бұрын

Good luck! Im very happy with the tumblers

@justinslife8898 6 ай бұрын

I wonder if a harbor freight large pulley can be put on national geographic tumbler 🤔 its larger, soo giving much slower tumble.

@RockOnUtah 5 ай бұрын

If the shaft is the same size it could work. Space clearance isn't an issue with the Nat Geo

@jarich7667 10 ай бұрын

Wow, what a great find! I'm only partially smart about electricity... does limiting the voltage cause heat somewhere? Anything that you have noticed or worried about? This is by far the best thing i've seen for this problem. I'm buying two and am thanking you a million times for making these little tumblers worth while!!

@RockOnUtah 10 ай бұрын

Well I'm far from an electrician but to my knowledge lower voltage wouldn't be an issue. (I've been issue and heat free for 3 months) Too much voltage would be where heat would be an issue but maybe keep a close eye on it the first day or two when you use it just to be safe.

@MrDanisve 8 ай бұрын

You are fine to lower the voltage abit. But probably shortening its life if you do it alot. I think 9-9.5 volts is fine. But i would not go much below that. Low-voltage lowdown. For an electric motor, torque changes as the square of the voltage applied. A 10% increase in voltage, for example, will boost torque 21% (1.1×1.1=1.21). Conversely, at 90% of rated voltage, the motor suffers a 19% reduction in torque (0.9×0.9=0.81). A more severe undervoltage condition, 20% below rated value, would reduce the motors torque to only 64% of rating (0.8×0.8 =.64). The effects are a 156% overload and catastrophic failure. If torque decreases below the torque required by the load, the motor would stall. At that point, the only product of the motor is heat. However, a 100-hp motor, with locked rotor, becomes a 500kW resistive heater. Add to that insultation lifespan in the motor decrease by half for every 10celcius its run. Severly undervolting an engine will probably hurt its lifespan, and might be a firehazard. Cause if your motor stalls, you are left with an heater.

@karenhohe3435 2 ай бұрын

Wow, perfect! Thanks a lot! 👍👍😁

@justinslife8898 5 ай бұрын

Is this still holding up and running?

@RockOnUtah 5 ай бұрын

Yep! Runs 24 hours a day

@justinslife8898 5 ай бұрын

@RockOnUtah the timer board still works though? I only asked bc another youtube video posted by a gentleman explaining how he ran a multi speed controller sorta like yours but it eventually gave him the "E" error code on his display but could not clear it... he's running the nat geo professional 3lb kit. He ended up cutting and spliced the motor and power, by passing the speed/timer display board. I'm running nat geo professional 2lb tumbler.

@RockOnUtah 4 ай бұрын

@@justinslife8898 sorry I didn't see this comment earlier. I have not had an issue with my tumbler having any error codes. I have worn out one motor that was replaced under warranty but that wasn't one that had ever been run at lower voltage. I have had 0 issues with this system.