Assistance with servicing Chinon SP-330 Magnetic 8mm Projector please

[Chris Manders]

Hello everyone
Thank you for allowing me to post on the forum.

I have recently acquired a Chinon SP-330 Super 8mm sound film projector that I am servicing in order to use it for my own use.
In essence it appears to 'work' and the lamp is good also but it looks like it hasn't been used for many years.
The grease has turned to 'sticky treacle' (truly awful) and it all needs cleaning out and replacing with fresh.

Through my own efforts I have managed to lubricate all the parts apart from the take-up reel area which is where I am stuck.

(I attach two photos).

From the end of the shaft I have removed a clip, a washer and a spring pressing the wheel in.
I am now looking at the end of a white wheel with a pin holding it in (as the photo - so it looks).
It looks like the pin should slide out, but I can't get it to shift at all.
I'm stuck at this point.
I need remove the wheel and get inside this area to clean it up.

Can anyone offer assistance at how to proceed, please? Perhaps someone has serviced this (or similar) projector, recognises this and knows what to do next.

Thank you
Chris

[Nantawat Kittiwarakul]

Probably unlikely, but there's a small chance that this pin is actually tapered. Punching it one way would free it up, but punching it other way will make it stuck in even deeper.😳
But in this case it would be more likely to be just a gummed up grease (or even rust inside) that prevent it from sliding out. A drop of proper solvent may help loosening it up.

[Shane C. Collins]

As Nantawat mentioned above, some solvent should loosen this pin up. In looking at this photo, my guess would be the pin probably slides out from the bottom. Another words, hitting the top portion with a small tap hammer should push the pin out from the bottom. But, this is just a guess on my part.

[Carl Ingram]

I think its a roll pin, its split along its length, this allows the spring steel to expand and lock into the hole its in and stay there, get some better close ups if possible, you may need a pin punch to remove though, be warned, this projector is, i believe the "steer clear list " for damaging film badly, there is a 350 too, not sure it could be either one of these models .......

[Rob Young]

Regarding the Chinon SP-350; I had one as a kid. Made loads of home movies using it and showed lots of bought super 8 films.

Never damaged anything.

My treasured print of Derann’s Gremlins had many happy screenings using the SP-350.

I still have the print and it’s perfect.

Sure, the Chinon used a plastic gate and had some cheaper design elements, but mine never damaged anything.

[Chris Manders]

Many thanks for all replies.

Carl, yes - It is a roll-pin. I've never come across this before and didn't know what it was or how to deal with it.
There was no taper - It was a compression fit and I manage to tap it out using a hammer and a modified brazing rod as a punch.
(I attach a zoom-in photo which also shows the 'sticky treacle grease' I need to clean up).

Apart from a fight I had with the one-way mechanism (it fell apart as I was disassembling it and it took a lot of thought to get it back together again working in the correct orientation) I manage to clean it all up and get it all going again.

Now I need some Super-8 films to test it with.

I hear you about 'damaging films' - I have heard both sides with this model.
The first few films I put through it to test it will be ones I don't mind losing/damaging.

Best wishes to all
Chris

[Nantawat Kittiwarakul]

Ah, that darn roll pin. The original design engineer(s) of this machine probably don't expect it to be so serviceable. so if it breaks down after - say - ten years, it's supposed to be discarded & replaced rather than repair.

Therefore this is almost a miracle that so many of these projectors are still alive & well 40 years later, well exceed their actual expected lifespan.

[Ed Gordon]

...be warned, this projector is, i believe the "steer clear list " for damaging film badly, there is a 350 too, not sure it could be either one of these models .......

The problematic Chinon is a model of the 330 (there were two or three models). I don't think the exact model of the Chinon 330 was ever identified. See discussion at: https://8mmforum.film-tech.com/vbb/f...2022#post70750. Be sure to watch the video of Jed talking about this issue at CineSea.