8mm Forum: Anyone have dimensions of 9.5mm sprockets?

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Topic: Anyone have dimensions of 9.5mm sprockets?

Billy Blair
Junior
Posts: 22
From: Hove, United Kingdom
Registered: Sep 2017

posted May 30, 2018 04:20 AM

As title. Im looking for the exact dimensions of a typical 9.5mm sprocket so I can 3D print some.

Thanks.

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Allan Broadfield
Master Film Handler

Posts: 452
From: Bromley, Kent
Registered: Nov 2010

posted May 31, 2018 10:23 AM

If you haven't already tried, look up 9.5mm film on Wikipedia. It gives all the dimensions.

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Billy Blair
Junior
Posts: 22
From: Hove, United Kingdom
Registered: Sep 2017

posted May 31, 2018 11:01 AM

Hi. Wikipedia only lists the films dimensions. Not the sprocket itself. [Frown]

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Luigi Castellitto
Jedi Master Film Handler

Posts: 715
From: Campobasso, Italy
Registered: Jun 2013

posted May 31, 2018 01:01 PM

Billy, Here it should be. [Smile]

http://pierreg.free.fr/cine95/c95tech.htm

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Billy Blair
Junior
Posts: 22
From: Hove, United Kingdom
Registered: Sep 2017

posted May 31, 2018 01:53 PM

Awesome! Thats exactly what I need!! I owe you a beer. [Big Grin]

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Allan Broadfield
Master Film Handler

Posts: 452
From: Bromley, Kent
Registered: Nov 2010

posted May 31, 2018 03:10 PM

Wikipedia includes the sprocket dimensions too.

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Billy Blair
Junior
Posts: 22
From: Hove, United Kingdom
Registered: Sep 2017

posted May 31, 2018 04:27 PM

@Allan: The only thing I could find is this which only mentions film dimensions: Wikipedia 9.5mm Film

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Allan Broadfield
Master Film Handler

Posts: 452
From: Bromley, Kent
Registered: Nov 2010

posted May 31, 2018 05:09 PM

It appears to give the width and height of the perforation.

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Allan Broadfield
Master Film Handler

Posts: 452
From: Bromley, Kent
Registered: Nov 2010

posted May 31, 2018 05:15 PM

It appears to give the width and height of the perforation.

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Billy Blair
Junior
Posts: 22
From: Hove, United Kingdom
Registered: Sep 2017

posted June 01, 2018 03:09 AM

Unfortunately width and height of perforation wasnt enough!

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Allan Broadfield
Master Film Handler

Posts: 452
From: Bromley, Kent
Registered: Nov 2010

posted June 01, 2018 03:35 AM

Ok, I'm obviously not au fait with things 3D - I still have probs with the smart phone!
Thanks.

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Billy Blair
Junior
Posts: 22
From: Hove, United Kingdom
Registered: Sep 2017

posted June 01, 2018 04:14 AM

No worries! Ill post a link to the final 3d object in case anyone wants to use it.

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Luigi Castellitto
Jedi Master Film Handler

Posts: 715
From: Campobasso, Italy
Registered: Jun 2013

posted June 01, 2018 07:31 AM

My pleasure, Billy!
A good old Ale! [Wink]

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Billy Blair
Junior
Posts: 22
From: Hove, United Kingdom
Registered: Sep 2017

posted June 10, 2018 01:23 PM

If anyones interested, Here's the 3D object to print from. It's not been tested though as I don't have a 3D printer so may need modifying. I designed it so the image area of the film isn't touching the sprocket.

Download STL file

[ June 10, 2018, 03:51 PM: Message edited by: Billy Blair ]

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Terry Sills
Phenomenal Film Handler

Posts: 1423
From: Weymouth,Dorset,England
Registered: Oct 2012

posted June 11, 2018 01:54 AM

I can understand that the flat surfaces between the sprockets would protect the film surface/ emulsion, but why the irregular outer rims? This would only serve to damage fragile or brittle film. Surely a simple circular shape would be better. All film sprockets have that feature.

[ June 11, 2018, 10:13 AM: Message edited by: Terry Sills ]

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Billy Blair
Junior
Posts: 22
From: Hove, United Kingdom
Registered: Sep 2017

posted June 11, 2018 03:12 AM

Thats just the way SketchUp renders circles to save processing power. It'll be perfect circle when printed. Ill do a proper render as the image was just a screenshot of one of the views in SketchUp.

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Billy Blair
Junior
Posts: 22
From: Hove, United Kingdom
Registered: Sep 2017

posted June 22, 2018 09:04 AM

Slightly updated with smoother edges and hole is standard 5mm.

Download STL 3D File

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Maurice Leakey
Film God

Posts: 5895
From: Bristol. United Kingdom
Registered: Oct 2007

posted June 22, 2018 09:39 AM

Very impressive. What will it be used on?

--------------------
Maurice

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Billy Blair
Junior
Posts: 22
From: Hove, United Kingdom
Registered: Sep 2017

posted June 22, 2018 10:03 AM

Mainly if youre building a telecine or a film cleaner perhaps.

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Dominique De Bast
Film God

Posts: 4486
From: Brussels, Belgium
Registered: Jun 2013

posted June 22, 2018 10:37 AM

Good job, Billy ! I was wondering, as Maurice, what you would do with it. Do you have a specific project or were you asked by someone else to manufacture those sprockets ?

--------------------
Dominique

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Billy Blair
Junior
Posts: 22
From: Hove, United Kingdom
Registered: Sep 2017

posted June 23, 2018 05:33 AM

quote:
Good job, Billy ! I was wondering, as Maurice, what you would do with it. Do you have a specific project or were you asked by someone else to manufacture those sprockets ?

Its just for personal DIY projects.

I built a telecine using the Bingoscope projector and thought I might need a sprocket to stabilise the film but it seems ok without it.

So decided to make my own version of the Film-o-Clean (as its so expensive!) using some good ol Lego Technics! It will have interchangeable sprockets and 9.5mm is one of them. The sprocket will go onto the top right spindle. If I ever get to 3D print it that is!

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Mark Mander
Phenomenal Film Handler

Posts: 1236
From: Dunstable ,Bedfordshire.
Registered: Jan 2005

posted June 29, 2018 05:43 AM

Looks great Billy,let us know how it performs,Mark

--------------------
Elmo GS1200 1.0 lens
Elmo ST1200HD 1.1 lens
Sankyo 800 1.0 lens
Elmo 16CL
Elf NT1

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Stuart Reid
Jedi Master Film Handler

Posts: 720
From: Worthing, West Sussex, UK
Registered: Feb 2009

posted July 13, 2018 09:00 AM

Seems to me a 3D printed Film-O-Clean would be a really useful tool!

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