Porting With an Electric Die Grinder
Moderator: Team
Re: Porting With an Electric Die Grinder
Gentlemen, can you help me slow down my piece-of-shit, Chicago Electric grinder? I bought a cheapo controller and all it did was slow it down from fuggin' nuts speed to too-fast-to-port speed.
Is there a certain specification I should look for in the product description? I'd like to kill this grinder before buying a really good one.
Is there a certain specification I should look for in the product description? I'd like to kill this grinder before buying a really good one.
Re: Porting With an Electric Die Grinder
The word is, you can't. I have tried to slow down the high speed grinders like that with a controller and all they do is bog down at low speeds. I bought a low speed high torque die grinder off of Amazon that did have it's own variable speed but when that failed I used the controller and it did work great with that die grinder and one other I have like it.RevTheory wrote: ↑Tue Dec 07, 2021 7:47 am Gentlemen, can you help me slow down my piece-of-shit, Chicago Electric grinder? I bought a cheapo controller and all it did was slow it down from fuggin' nuts speed to too-fast-to-port speed.
Is there a certain specification I should look for in the product description? I'd like to kill this grinder before buying a really good one.
Re: Porting With an Electric Die Grinder
I used a foot controller like you would see from a sewing machine. I will never port without it. Easy to get to stop and I can constantly control speed to match the amount of force I am putting on it.RevTheory wrote: ↑Tue Dec 07, 2021 7:47 am Gentlemen, can you help me slow down my piece-of-shit, Chicago Electric grinder? I bought a cheapo controller and all it did was slow it down from fuggin' nuts speed to too-fast-to-port speed.
Is there a certain specification I should look for in the product description? I'd like to kill this grinder before buying a really good one.
Paul
"It's a fine line between clever and stupid." David St. Hubbins
Re: Porting With an Electric Die Grinder
A shaft drive by Foredom sure works well and they offer great parts support. Mine is OLD and I keep it running just fine.
Re: Porting With an Electric Die Grinder
That's probably the same grinder I have. 1 controller doesn't slow it down near enough... especially for a 6" long burr. 2 controllers slow it down but then it has no power at all and bogs down way too easily.RevTheory wrote: ↑Tue Dec 07, 2021 7:47 am Gentlemen, can you help me slow down my piece-of-shit, Chicago Electric grinder? I bought a cheapo controller and all it did was slow it down from fuggin' nuts speed to too-fast-to-port speed.
Is there a certain specification I should look for in the product description? I'd like to kill this grinder before buying a really good one.
Last time I looked there was still no Foredoms available
Re: Porting With an Electric Die Grinder
Slow down your high speed electric grinders with a router speed control box from Harbor Freight. Works just fine, and mine has been used almost daily for a couple of years without issue, especially with coarse cartridge rolls that need speed control. Will work with a shorter shank(3-4" carbide, also) I cut a 6" shank carbide for special areas where I can use a 90* air die grinder. Joe-71
Joe-71
Re: Porting With an Electric Die Grinder
This is the one I've got and it's still too damn fast. https://www.woodline.com/products/route ... TfEALw_wcBJoe-71 wrote: ↑Tue Dec 07, 2021 3:23 pm Slow down your high speed electric grinders with a router speed control box from Harbor Freight. Works just fine, and mine has been used almost daily for a couple of years without issue, especially with coarse cartridge rolls that need speed control. Will work with a shorter shank(3-4" carbide, also) I cut a 6" shank carbide for special areas where I can use a 90* air die grinder. Joe-71
-
- Vendor
- Posts: 3647
- Joined: Sat Feb 14, 2004 4:04 pm
- Location: Abbeville, LA
- Contact:
Re: Porting With an Electric Die Grinder
your's looks like the 2 new ones i have . (Goodson and Lowes units)RevTheory wrote: ↑Tue Dec 07, 2021 3:35 pmThis is the one I've got and it's still too damn fast. https://www.woodline.com/products/route ... TfEALw_wcBJoe-71 wrote: ↑Tue Dec 07, 2021 3:23 pm Slow down your high speed electric grinders with a router speed control box from Harbor Freight. Works just fine, and mine has been used almost daily for a couple of years without issue, especially with coarse cartridge rolls that need speed control. Will work with a shorter shank(3-4" carbide, also) I cut a 6" shank carbide for special areas where I can use a 90* air die grinder. Joe-71
the best one i have ( 3rd one ) is an old WW Grainger (Lutron 10 AMP constant Torque control) in my Porting Room ,
it will go much lower RPM than your's and my 2 new ones ,
and still have constant Torque ..... i wish they still made that one ... if i ever find one like it for Sale , i'll instantly buy it
Re: Porting With an Electric Die Grinder
I had to dig deep but if I'm not mistaken, this is the one used in Vizard's porting benches. I believe it was wired to the outlet that our grinders were plugged into. Am I out to lunch? Whatever it was, it would slow this grinder down to where it would simply buzz without rotating.
https://www.amazon.com/dp/B079BB7VK5/?c ... dp_it&th=1
https://www.amazon.com/dp/B079BB7VK5/?c ... dp_it&th=1
-
- HotPass
- Posts: 596
- Joined: Sun Jul 30, 2017 2:24 pm
- Location: Summer Shade, Ky
Re: Porting With an Electric Die Grinder
What you want is rheostat, like a ceiling fan speed control not a dimmer switch type control. A rheostat controls the hertz frequency a dimmer Switch controls the voltage . When you drops the voltage the amps go up because you are not changing the wattage of the motor. this can overheat the cord and or windings burning thing out. Changing the frequency slows the alternating current speed and slows the motor down without the added heat. Home improvement store should have them , they are rated by wattage of what its controlling. they usually have a big aluminum heat sink on them with a dial or slide to adjust speed . I Have the same problem with my Harbor Freight rotor control just haven't got around to installing one in the new garage since moving .Dan
Re: Porting With an Electric Die Grinder
The question was asked, and answered. Works for me with a Dewalt high speed die grinder just fine. I can slow it down to the point the grinder will stop with any pressure, and still speed up if I move the control knob to a higher setting. The Dremel foot controller quit within a week. For the price, you can't beat the Harbor Freight I have 4 Dewalts loaded, with another dozen air grinders ready to save time. Joe-71
Joe-71
Re: Porting With an Electric Die Grinder
how much guts does the 1/6hp Foredom have compared to a Mak ? it seems like fairly low on power level how does it work in practice on Al?
-
- Expert
- Posts: 735
- Joined: Sun Dec 14, 2008 8:37 pm
- Location: Broken Arrow, Oklahoma
- Contact:
Re: Porting With an Electric Die Grinder
All I use is the foredom. Does great for me just get the square drive otherwise will keep wearing off the tips on the key drive.
Eric Weingartner
Weingartner Racing LLC
918-520-3480
www.wengines.com
Weingartner Racing LLC
918-520-3480
www.wengines.com
Re: Porting With an Electric Die Grinder
This looks to be an AC phase angle control package mated to a SSR. It should provide line full voltage (and torque) at all settings but cuts the sine wave % to control speed. Connected to an appropriate foot controlled variable resistor would be a good choice for port work.RevTheory wrote: ↑Tue Dec 07, 2021 5:45 pm I had to dig deep but if I'm not mistaken, this is the one used in Vizard's porting benches. I believe it was wired to the outlet that our grinders were plugged into. Am I out to lunch? Whatever it was, it would slow this grinder down to where it would simply buzz without rotating.
https://www.amazon.com/dp/B079BB7VK5/?c ... dp_it&th=1
Search for "AC phase angle motor control" for a greater understanding. It is common in industry for AC motor control.
- Paul
-
- Guru
- Posts: 1597
- Joined: Mon Sep 21, 2009 11:58 pm
- Location: tenn
Re: Porting With an Electric Die Grinder
Do these count as electric and as shown has several 6 inch in now
You do not have the required permissions to view the files attached to this post.