Thread: Advice on DeWalt Dw 626 plunge router

Hello, I have found this thread fascinating! i cant believe there is so much knowledge still around for this beast of a router. I bought a group of old woodworking machines 12 months ago and i got one of these with it. Its been stuck under my bench since but I have been thinking recently of trying to make a table for it and have it permanently set up. I personally think its a tad overkill for a handheld device. On closer inspection the machine starts up fine but the 12" collet is broken. does anyone know where i can find a compatible replacement? I have spoken to trend and they were unable to help.

Kind Regards

Jim

Dear Sir,
I read your comments with great interest.
No one had pointed out these issues to me earlier.
I reside in India where it is 220volts with 55 hz.
Could I run a 230volts UK (Dewalt 625) router without any problems?
Please do let me know.
thanks

Indranil

Originally Posted by gerhard

Hi Berlin,

When running a 240 Volts machine on 220 Volts, you must take some power loss into account. The power loss is even a square value of the voltage loss! 220 Volts is a 917/1000 part of 240 volts. A 240 Volts machine will therefore only have 0.917 x 0.917 = 841/1000 or 84% of its original power when operated on 220 Volts.

Furthermore, the 60 Hertz instead of the European 50 Hz will heat up the motor slightly faster, but i don't think there will be a higher rpm because of this higher frequency. Induction motors have a direct relation between AC frequency and rpm, but series connected "brush type" motors are rather slightly impaired by higher frequencies. It is a physical property of a wound copper coil to have higher inductance and current limitation at higher frequencies and series motors have coils in both stator and rotor, doubling this effect. When for instance electric locomotive traction motors (which are also series motors) were fed AC in the latter 19th-/early 20th century because of the bigger advantages that AC power had to offer, huge problems with overheating and commutation were experienced. That's why 50 or 60 Hz could only be used when sufficient motor construction knowledge was gathered to adapt the entire electrical circuit to standard power grid frequencies. Until then, frequencies as low as possible were used for AC electric trains, like 16 2/3 or 25 Hz. So on 60 Hz there will be slightly more heat and commutator brush fire

Instead of the MOF11's designed 18,000 no-load speed on 240 V, the rpm will be around 16,000 to 17,000 no-load on 220 Volts. So you should treat the machine as if it had only an input value of 1600 to 1800 Watts and i also advise to not let the load rpm get below a minimum of 11,000 to 12,000. Used in that way you could use the router continuously for days on end without overheating damage whatsoever.

I will look up some pics of various spanner types. The "metric fine" M12x1 thread (12 mms diameter and one winding per millimetre) was a much used standard for European routers. There was (and still is) a wide range of router bits available to fit this arbour size. You just screw them on, they are self-centering in a very precise way and they do not slip under high torque loads. The MOF11 was a large production machine to make for instance stair case constructions or louvre slats or door slots to fit closing mechanisms in. Therefore, the bases and accessories were mostly meant to be used for longer periods in one particular setting. Later, the MOF 31 was added as a medium powered machine (1200 Watts) to be used along the MOF 11. As a typical plunge router it was much more versatile for mixed odd jobs around the craftman's workshop and its arbour thread of M12x1 guaranteed that it could make use of the smaller sizes of the MOF11's bits assortment, which cut tool costs for the craftsman. The 1600 Watts MOF 98 and its electronic version 77 were fitted with a spanner as standard, since they were meant as universal plunge routers to be used with standard smooth shaft bits rather than the system bits from the types 11 and 31.

Elu itself of course offered spanners with M12x1 inside thread, to fit both the MOF 31 and 11. But other brands had them in their assortment as well, like Tarpley from England. When added to the MOF11, the advantage is obvious. Much cheaper conventional shaft bits can be used, since the inside threaded M12x1 bits cost twice as much on average.

Best of greetings!

Gerhard

Dear Mr. Indranil!

Thank you very much, i'm very glad that my information was useful for you. Your DW 625 will run on 55 Hz without any problems. Even the electronics will behave normally. The motor will be a fraction less powerful (approx. 1750-1800 Watts instead of 1850). This is partly due to the somewhat lower voltage (the motor is optmised for 230 volts but will receive 220 in India) and partly to the slightly higher Hertz-count. The conductivity of coils is dampened by higher resistance caused by more intense induction when the Hertz-count is raised. The best example is a "choke coil" as used in two- or three way loudspeaker systems. By connecting a choke coil in series with the large bass frequency "woofer"l oudspeaker, high frequency tones are met with high resistance and are thus prevented to leak away through the low resistance of the woofer's drive coil. Instead they are fed to a small high frequency "tweeter" speaker, which is connected in parallel with the woofer-choke coil array, but the tweeter is also connected in series with a capacitor. Capacitors offer low resistance to high frequencies, but are very limited in transfering low frequencies. The capacitor also prevents the tweeter's fragile drive coil from begin blown up by the powerful low base pulses, that are meant to be processed by the woofer speaker.

To translate this theory back to the router motor; the 10% higher Hertz count (55 instead of 50) results in few percent higher resistance inside the coils, resulting in slightly less power intake. The difference, however, is far less dramatic as using a European tool in the USA (60 Hertz). Power loss is more signifcant in these cases and the motor is prone to run slightly hotter.

But in your case: don't worry, the DW 625 will work fine in India. India also makes fine copies of the tried and trusted Wolf power tools, under the Ralliwolf and Stark brands. These tools were once laid out for 50 Hz, but have built up good reputations in India for more than 3 decades.

Kind regards from Holland !

gerhard

Thank you so much for so painstakingly explaining the issue to me. You have made a complex issue transparent!
By the way, after posting the query to you, I found out that India officially runs on 230 Volts and 50 Hz as does most of Europe. Only, the actual voltage tends to fluctuate a lot and is closer to 220 Volts and below.
I did not know about the two Indian manufacturers. How amazing that someone from the Netherlands should inform me!
best wishes

Hello, guys, greetings from Norway!
I recently got an Elu MOF 11/2 router with one column stand.
I got it for free, saved it from landing in trash, actually.
The stand was stuck with rust, I've put a lot of work into making the machine operational again (just finding an adapter for standard shank bits took a bit of time), when I had everything in place the machine made a "puff" and went silent. I was about to cry.
Opened up the motor and found out that the suppressor - capacitor thing exploded. It was to stained to decide what parameters it has and I can't find that part on the web. Dewalt version has a capacitor that looks totally different.
Mine is a cylinder 26 mm in diameter, about 50 mm long, made of paper, 3 wires go in (live, neutral and ground), 3 wires come out on the other side.
The machine starts if I connect the wires directly to motor, but I'm afraid to damage it by using without that capacitor.
What replacement I should look for?
Help me, please!!

Originally Posted by jimsteach

... On closer inspection the machine starts up fine but the 12" collet is broken. does anyone know where i can find a compatible replacement? I have spoken to trend and they were unable to help.

Kind Regards

Jim

I recently bought an adapter with collets produced by CMT. I bought it via Polish online shop (I come from Poland and live in Norway)
https://www.punta.com.pl/sklep,1682,uchwyt_796
I managed to find a similar adapter on a German webpage
https://napoleon-werkzeuge.com/index...l=315-9&lang=1
but they wouldn't reply to my question about shipping price. It was impossible to see the price and to know i one can pay via paypal until one makes the purchase - quite dumb - you have the obligation to pay before you know if it's possible and how much you will have to pay.
Other German shops have something similar also - need to look for elu mof 11 / 31 spannzangenfutter
I found it in Poland, and it was easier this way, so didn't check how it works with buying it in Germany from abroad.
Dewalt also has some adapter like this in their offer, but they also wouldn't reply to my email and online catalogue was unclear.

for adapters:

DE 6281: Adapter for shaft M12x1
with the Adapter DE 6281 you can use all collets of the big DeWalt routers (DeWalt DW 629, DW 624, DW 625E und ELU MOF 131, MOF 177, MOF 177E) with M12x1 shaft of the MOF 11.
DE 6282: shaft M12x1 to 1/2" (12,7 mm) collet
DE 6283: shaft M12x1 to 12 mm collet

Number of the collets
DE 6272: 6mm
DE 6273: 1/4"
DE 6274: 8mm
DE 6275: 3/8"
DE 6276: 10mm
DE 6277: 12mm
DE 6278: 1/2"


for the capacitor:
Spare Number part is 868027-00 1 KONDENSATOR. Maybe you just have to buy this one, to see it's specifications nowadays printed on it, to buy a round one with the same specifications.