My Philips 8718 Tape player has a broken gear.
The diameter is 3 cm, the gear is orange. 

Gear is 3cm in diameter, thickness 3 mm, small central gear about 1 cm in diameter. 

The system it comes from is Philips Compo Sound Machine 8718 (Metal Tape, Motor Drive, RS servo controlled, Dynamic Noise reduction, Hydraulic eject) Tape Unit LW - RS14, WT 01 341, 04 18 48

Please see attached pictures for more information.

wow thats tragic , hope some one can help you out, 

Thanks and keep me informed / Merci de me tenir au courant

I attached more pictures with the actual missing gear set from a working Philips 8718.

Je joint quelques photos du pignon manquant si cela peut vous aider.

Si vous pouvez l'imprimer aux dimensions nécessaires je suis partant pour vous envoyer un paiement Paypal pour le fichier cad et pour le pignon du jeu d'engrenages.

I will be glad to send a Paypal payment if you can create the gear set to the desired dimensions.

Tadaaa! :

I will post the 3d file as soon as I have printed and tested the gear in my D8614

Thanks for the CAD file and if it works, print a couple of them and send them to me. Just let me know how to contact you directly.

Use a filament like this one to print the gear, otherwise there'll be too much noise during playback:

http://www.amazon.com/gp/product/B00TI3JUV0

Best of luck to you two.

VV

Great work guys! This would be so great if it works! Try to use the strongest material you can get. The gear is only used for a short time during rising the head assembly and other short control actions, so noise and mechanical wear is hardly a factor. The most critical part is where the small gear is connected to the big gear. Try to design it as strong as possible!

Hi Virgil,

i totally agree whith you, TPU is the perfect material for the job but, as Michiel said, this gear is only used by a servomotor to set the control actions. This gear is perfectly quite while playing Music. So, I think PLA or ABS will be fine. I may be wrong for the angle, but I have set the helical part of the gear at -30°(60° left). I will see...

Testing :

@wiizzzz and @Dominique: on my model (and typical of helical gears in these mechanisms) the teeth on the big gear are angled at 70°. Looks like in the 3D model above they are angled too much.

You're wright,; the correct angle is 20° left.

 Great job otherwise!

No grease at all for the moment. I have petroleum Vaseline, water based Vaseline, high quality lithium and silicone greases. My new gear is PLA plastic, and I dont know witch grease to use.

I'd use silicon-based grease, medium viscosity, like Baysilone or Tri Flow:

http://www.jenabioscience.com/..._slides__grease.html

http://www.amazon.com/dp/B000C15MUU

The problem with grease is that eventually it will attract dust and that would eat your brand new teeth, though in practice this is very seldom. If it lasts another 30 years (say, with the grease), I'd be happy anyway :-)

If you clean this box regularly, add a touch of silicon grease and see if the noise diminishes.

It's not a biggie since like people said on the thread, the gear is not used all the time. It's just a scary sound :-)

Hi guys,

I have reached my goals, All as I have wanted Is to play this kind of thing in my boombox :

Now I can do Play, pause, stop, eject and its all thats I wants. fast forward, rewind and record still doesn't works. I do have other gear problems I think. But who cares with this type of cassette...

Here is the photo of my spare printed gear, It was printed in PLA in an Ultimaker printer, as you can see the quality is not perfect, but it's works :

I have also included my *.stl 3d model (with the right 20° angle, thanks Virgil)  in attachment for those who need it.

If your Fast Forward and Rewind do not work it may be caused by a small gear same color just below the belt area. It is spring mounted. Same orange color as the servomotor to set the control actions. This smaller gear allows the F-F and F-R to drive the tape and maybe Record. I am not sure , until I get the gear set for the servomotor control actions. 

I am attaching a picture of the broken / missing Gear location. I have 2 Philips 8718 but one of the two has a bad Cassette deck which I am trying to repair. I am at least able to compare one against the other.
 

Hi, Dominique,

Can you take it out, clean it, scan it and measure it with a pair of calipers? Thickness, diameter, thickness of the axle it mounts on (i.e. the center hole) and number of teeth should do it.

Number of teeth 28

Diameter 13 mm

Thickness 1 mm

Very difficult to access.
I do not have a repair manual so I am looking into how to get the Cassette Deck out of the unit. 

Hi, Dominique,

We'd also need to know if the gear is helical or not, as well as its mounting hole diameter. Generally there's another set of teeth on a smaller circumference circle, just like the big orange one that broke. Perhaps this is under the surface - the gear is probably mounted upside-down.

I don't know how comfortable you are with this, but depending on the condition of the mechanism, I'd take everything apart, give each part a good bath with soapy water and then reassemble them.

There are similarities between the D8718 and my CD555, at least conceptually. The gear that was broken in my machine is used for FFWD/REW FCUE/RCUE FPBK/RPBK and also to move the REC switch, all of which I believe is similar to yours. My cassette mechanism is an auto-reverse recorder.

A very clean work environment, lots of pictures and clear labeling of your parts are key to the success of this operation. Also, try to disassemble and reassemble all in one day, because otherwise you forget what goes where. If you forget too much, you end up with extra parts you can build another boombox with :-)

In this case, I would just take the wheel out and put everything else back in. Do not rotate / touch other gears as you take this one out unless you figured how the mechanism works.

Here's a repair manual I found for your model. It's not as detailed as mine - and mine didn't include the CD or cassette mechanism anyway :-).

http://freeservicemanuals.info...ad/Philips/d8718.pdf

Hope this helps,

Virgil

Aren't you looking for this gear? I remember it had the same specs..

http://REPLACEMENT ERROR/topic...part-no-482240340117

Correct it is the same gear. I will be glad to buy a couple of them. 

Sorry dude, I only made a couple of them and send them to peeps to test them. Sadly I never heard from them again, so dunno if it was successful. Maybe I will make more if I ever pick-up the D8614 project again, but my project list is looooong.... Maybe wiizzzz is able to help?

I guys,

I'll make a try this w.e with the specs provided by Dom.

Thanks a lot for the drawing wizzzz! I just fired it into the Ultimaker and it looks really great! Cant wait to install it into my D8614! 

Looks great. I cannot get my local 3d printing lab to get it done for me.

Anyone can print a couple of them for me? You can contact me via message. Thanks.

You're welcome Michiel I hope my drawing helps you

Dom : Don't worry, I haven't forgotten you...

It was a breeze with your drawing Wiizzz! Pulled it into Cura, set it on highest print quality and it began. I used PLA at 220 degrees. I had set the gap between head and object extra tight, so it pushes the material extra tight for more strength

You did a heroic thing by sharing the drawing Wiizzz! One of the best shares since I'm here IMHO. You saved a lot of Philips boxes for a lot of people in the future I think! Personally it made me very happy too! I'm back to the roots of my collection... The fabulous D8614! Thanks again! 

I need 3 Gear's printed for these Philips D8614 (1) &  Magnavox D8623 (2) all three have the same gear issue.  I have paypal if requested

I would really appreciate anybody with access to a printer and that could print these 3 gears for just these 3 box's.  Thanks

IMG_3293 Three Gears Printed Please Philips D8614 Magnavox D8623 on end Ph D8514 Mag D8523 

The Two smaller on end units do not normally be on this shelf as this is where I keep the flashlights and the unit on top of those ended up does not stay there either but the 2 on the Right have been there ever since there was a possibility of gears being printed. 

Hi there guys I've been reading through the threads. I've got one of these philips d8614 coming in a couple days. Aparantly casstte deck not working. 

So this thread has been very good to read. When I take it apart. And find out what is wrong. Could you guys been kind enough to help me out when I find what cog I need. 

Graham 

Would you be able to help my Philips d8614 cassette deck cog out please. I've read this forum and thread and I'm so glad I came across your post. I think some here say your a legend. For saving philips boomboxEs. 

Graham

Hi there did the 3D design work my d8614 is in the same way with gear cogs. 

Wow, a lot of empty space inside that D8718 !!   That box is huge!

Dear Michiel,

could you print out 2 of these beautiful white wheels for me and send to Vienna? Pre-pay on bank account no problem.

Best Regards - Clemens

DrK. posted:

Dear Michiel,

 

could you print out 2 of these beautiful white wheels for me and send to Vienna? Pre-pay on bank account no problem.

 

Best Regards - Clemens

Sorry Clemens, I'm not printing them on order or sell them. The whole idea is that you find yourself a fab-lab where they have 3D printers (they are scattered everywhere nowadays) and make your own print from the drawing! People can help you there to make the print I'm sure 

Btw I must admit I even didn't find the time to build my gear into the box yet, so I'm still not sure if it works, but I guess it does. It looks awesome anyway