iFixit - Answers With Device "Rotary Tool"

Dremel 4000: Porque enciende pero no arranca

Mon, 04 Jan 2021 15:47:54 -0700

Entra corriente pero no inpulsa

⟐ Commented enero 04, 2021 at 15:47 GMT-7

Dremel 8200: No funciona el control de velocidad, va siempre a tope

Sun, 04 Feb 2024 00:47:51 -0700

Hola:

A ver si me podéis ayudar. Resulta que a mi Dremel 8200 se le ha jodido el control de velocidad. La he desmontado y me he encontrado con esto:

Se puede comprar toda la placa controladora, pero el problema es que se va a más de 50 €, con lo que no sé si me compensa...

Creo que el fallo está en el potenciómetro (lo desoldaré y lo verificaré). El problema es... ¿sabéis si se puede conseguir suelto?

Y no os cortéis, me interesa vuestra opinión... ¿cómo lo arreglaríais vosotros?

Gracias y un saludo.

Muchas gracias por responderme. He estado revisando la placa y ya he visto el problema. No creo que esté “tocado“ el potenciómetro, creo que el fallo está en el mosfet de canal N 80NF03L-04, que se ha quemado y, por lo que he visto, le ha pasado a más gente. Te adjunto una imagen para que lo veas. El problema es que veo que la placa también está bastante “tocada“, así que me da que habrá que cambiar toda la placa. Aquí viene el dilema, que no venden la placa suelta (o yo no la encuentro), sino toda la controladora, que se va a más de 50 €. Lo que voy a probar es a repasar las soldaduras, a ver si el mosfet va, pero me da que no. Encima, lleva unas resistencias mini que esas sí que no se me ocurre cómo podría cambiarlas… Si se te ocurre algo, no dudes en decírmelo y repito, muchas gracias.

⟐ Commented febrero 04, 2024 at 0:47 GMT-7

Other Brand Rotary Tool: Por que mi rocaflex Bosch no tiene velocidad y suenan los piñones

Fri, 17 Apr 2026 04:43:41 -0700

Mi Rocaflex Bosch, se ha quedado sin velocidad y se oye los piñones.

La he abierto y los dientes de los piñones están bien, no se que le puede pasar

Gracias

Dremel 4000: How can I keep my Dremel from overheating?

Tue, 04 Aug 2020 02:39:25 -0700

I've had my Dremel 4000 for over a year, and I've never had trouble with it. Recently though, I've noticed that the tool gets very hot after only a few minutes of use, and sometimes there is a faint burning smell. It functions well enough before it gets hot, and I don't hear any grinding when it is running. Any insight is appreciated.

⟐ Answer deleted agosto 04, 2020 at 2:39 GMT-7

Dremel 4000: Why is my Dremel is making loud squealing noises when in use?

Sat, 27 May 2023 19:53:34 -0700

When I use my Dremel it makes loud squealing noises, the faster it spins the louder it gets.

⟐ Commented mayo 27, 2023 at 19:53 GMT-7

Dremel MultiPro 395: Why is my Device not turning on?

Fri, 17 Oct 2014 09:50:00 -0700

I plugged My MultiPro in and no matter what I do it will not turn on. The bit will not rotate and the device seems to not be getting power at all. Can this be fixed?

⟐ Answered octubre 17, 2014 at 9:50 GMT-7

Dremel 8200: No Power coming from tool

Wed, 01 Oct 2025 05:55:23 -0700

I was cutting a sheet of paneling and the tool stopped and the 3 battery indicating light on the tool was flashing 1 at a time so i plugged in the battery and set to charge and after charged the same 3 lights on the tool were still blinking and still no power to the tool

⟐ Commented octubre 01, 2025 at 5:55 GMT-7

Dremel 4000: Stopped working, brushes look fine. What might be wrong?

Mon, 12 Aug 2024 01:20:21 -0700

I was cutting a ridge in a board, stopped inbetween to sand and check if it is wide enough to fit my board and the dremel just wouldn't turn back on. I opened it because I thought there might be dirt inside but not really. The brushes are still 1/2 inch+ so it can't be that and tested on different outlets.

⟐ Answered agosto 12, 2024 at 1:20 GMT-7

Wen 2307: Why is my device overheating?

Mon, 29 Feb 2016 12:45:24 -0700

My Wen Rotary tool is overheating after using it after an hour of use

⟐ Answer accepted febrero 29, 2016 at 12:45 GMT-7

Dremel 4000: Dremel 4000 quit working

Thu, 03 Oct 2024 06:28:26 -0700

Hi my Dremel 4000 which really didn't have much use on it just quit working. After researching it several you tube video's suggested the one of the winding wires on the coil broke at the crimp spot so it seemed like a simple repair. Upon close inspection I couldn't see a broken wire and did a continuity test on the windings and they seem to be okay. I have a new switch assembly coming so hopefully that will do the trick. I guess my questions would be am I on the right track? Does anyone have experience with Dremel problems? My last older model Dremel just up and quit after again really not much usage but I didn't bother to research it so maybe the broken coil wire trick might have fixed it. Thank you.

⟐ Commented octubre 03, 2024 at 6:28 GMT-7

Dremel 7300 MiniMite Cordless: What does the blinking light mean?

Wed, 07 May 2025 13:04:40 -0700

I noticed that the green light is blinking. Is something wrong with the Dremel?

⟐ Commented mayo 07, 2025 at 13:04 GMT-7

Dremel 8200: Collet Nut Frozen on Shaft

Sat, 17 Oct 2020 13:32:58 -0700

I have not used this Dremel tool in some years. The Collet Nut is frozen to the shaft and cannot be loosened to insert bits. How can I loosen this? Short of replacing the entire shaft? I have already soaked the part in coke and it has not loosened.

⟐ Commented octubre 17, 2020 at 13:32 GMT-7

Wen 2307: Why is my rotary tool making a squealing sound?

Wed, 02 Mar 2016 11:58:31 -0700

Last week my device starting making a squealing sound after an hour of use and I don't know what exactly started the problem.

⟐ Commented marzo 02, 2016 at 11:58 GMT-7

Dremel 7300 MiniMite Cordless: Why won't the Dremel won't turn on?

Fri, 17 Nov 2017 12:28:48 -0700

I know it is charged and I am flicking the on/off switch but no noise or anything. What is wrong?

⟐ Answered noviembre 17, 2017 at 12:28 GMT-7

Wen 2307: Why is my device not holding a bit?

Tue, 01 Mar 2016 00:19:02 -0700

I am trying to put a new bit in my rotary tool but it keeps falling off when I try to adjust it

⟐ Commented marzo 01, 2016 at 0:19 GMT-7

Dremel MultiPro 395: Why is my device running at inconsistent speeds?

Thu, 13 Apr 2023 06:24:04 -0700

I plugged my device in and it will either turn on and run super fast or super slow and nowhere in the middle. How can I go about fixing this problem?

⟐ Commented abril 13, 2023 at 6:24 GMT-7

Dremel 8220: Why is my Dremel overheating?

Sun, 24 May 2020 05:22:22 -0700

So I've been using this device for about 3 hours and within that time I needed to charge the battery. When i did that I used it again right after and while I was using it, the device seemed very hot, the battery specifically. What's wrong with my device?

⟐ Answered mayo 24, 2020 at 5:22 GMT-7

Dremel lite 7760: I have a newer dremel7760 needs a battery

Wed, 21 Jun 2023 01:55:21 -0700

I have the newer dremel7760 lite with internal 4v battery. It was given to me as a bag of dremel “disassembled” I put a 18650 battery in to test but it cuts off on high"4" does anyone know what battery is supposed to be in this dremel lite 7760

⟐ Answer accepted junio 21, 2023 at 1:55 GMT-7

Dremel 8200: Speed Control Triac Number

Thu, 03 Oct 2019 10:57:34 -0700

What type of Triac is used on the 8200?

I've burnt mine out and can't read the number.

⟐ Answer edited octubre 03, 2019 at 10:57 GMT-7

RotoZip Rebel REB01 Type 2: Is it possible to replace the power cord?

Fri, 19 Jan 2018 20:00:45 -0700

I noticed the other day that the power cord on my saw is a little damaged. I don't want to risk using it like this, but the saw is still in good shape so i don't want to throw it away. Is there a way to replace the power cord on the saw?

⟐ Answer accepted enero 19, 2018 at 20:00 GMT-7