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Posted

Hi,

Has any one done mods to there Tamiya Handy Drill besides replacing the plastic bushing with bearings?

I was thinking to up the motor to Tamiya 15186 JR Plasma Dash Motor.  The stock motor is 12K RPM while this new one does ~24K.

Curious if any one has done a brushless conversion?  I'm sure an additional circuit board would be in order as well.

Any thoughts/ideas are welcome.

 

 

Posted

Hi,

So I ordered a potentiometer and the Tamiya 15186 JR Plasma Dash Motor and will update once I got this all working.  The reason for the high RPM motor is to have a better range of tuning.

I enjoy hacking things etc... hence why the interest in this other wise banal topic.

 

Posted (edited)
23 minutes ago, 935k3 said:

What size drill bits(number range) fit in this drill? The ability to slow it down is a good idea.

Hi,

Well I'm unsure but it does include 2 chucks that fit most of my bits.  But for the really small ones I've other chucks that fit.  Seems pretty versatile.

This video covers the chucks;

 

And these collets/chucks are supposed to fit;

https://www.amazon.com/s/?ie=UTF8&keywords=proxxon+28940&tag=googhydr-20&index=aps&hvadid=238273474222&hvpos=1t1&hvnetw=g&hvrand=224074518060420823&hvpone=&hvptwo=&hvqmt=e&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9031019&hvtargid=kwd-300377467891&ref=pd_sl_5wc9ps0gq1_e

Edited by aurfalien
Posted

I have a old fashioned Dremel tool and I modified its speed control to slow it down - anything more than 1000 RPM will melt the plastic instead of grinding it. No need for speed.  But if you are grinding metal then you can let it rip at high speed!

  • 4 weeks later...
Posted

Hi,

So I went with a standard 2 amp potentiometer as the included motor is a 130 SA drawing 2 amps max.

I had tried the Plasma Dash motor but it required a different pot allowing 5 amps max as that motor can draw up to 4 amps.  Also this particular pot required more voltage so I wired 3 batteries up.

Every thing ran well but in the end it was too much of a hot rod so I went with a 2 battery + default motor which is pictured.

i did swap the chucks out for one allowing much smaller drill bits.

 

 

 

IMG_3096.JPG

IMG_3097.JPG

Posted

Sorry for being pedantic, but a potentiometer or a "pot" (aka a variable/adjustable resistor) is the green cube-shaped thing at the end of the speed control knob.  The entire circuit is a Pulse Width Modulated (PWM) motor speed controller.

Posted
On 2/24/2018 at 8:45 PM, aurfalien said:

Hi,

Has any one done mods to there Tamiya Handy Drill besides replacing the plastic bushing with bearings?

I was thinking to up the motor to Tamiya 15186 JR Plasma Dash Motor.  The stock motor is 12K RPM while this new one does ~24K.

Curious if any one has done a brushless conversion?  I'm sure an additional circuit board would be in order as well.

Any thoughts/ideas are welcome.

 

 

Frankly, I would NEVER bother with that "punch drill", regardless of its possible popularity in Japan, as I cannot think of any tool that would cause the instant death of say a #76 (.020" carbon steel drill bit)!  I'll keep my pin vise, thank you.

Posted (edited)
3 minutes ago, Art Anderson said:

Frankly, I would NEVER bother with that "punch drill", regardless of its possible popularity in Japan, as I cannot think of any tool that would cause the instant death of say a #76 (.020" carbon steel) drill bit! I'll keep my pin vise, thank you.

 

 

3 minutes ago, Art Anderson said:

 

 

Edited by Art Anderson

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