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Author Topic: Anyone have dimensions of 9.5mm sprockets?
Billy Blair
Junior
Posts: 20
From: Hove, United Kingdom
Registered: Sep 2017


 - posted May 30, 2018 04:20 AM      Profile for Billy Blair     Send New Private Message       Edit/Delete Post 
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: 431
From: Bromley, Kent
Registered: Nov 2010


 - posted May 31, 2018 10:23 AM      Profile for Allan Broadfield   Author's Homepage   Email Allan Broadfield   Send New Private Message       Edit/Delete Post 
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: 20
From: Hove, United Kingdom
Registered: Sep 2017


 - posted May 31, 2018 11:01 AM      Profile for Billy Blair     Send New Private Message       Edit/Delete Post 
Hi. Wikipedia only lists the films dimensions. Not the sprocket itself. [Frown]

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Luigi Castellitto
Jedi Master Film Handler

Posts: 578
From: Campobasso, Italy
Registered: Jun 2013


 - posted May 31, 2018 01:01 PM      Profile for Luigi Castellitto   Email Luigi Castellitto   Send New Private Message       Edit/Delete Post 
Billy, Here it should be. [Smile]
http://pierreg.free.fr/cine95/c95tech.htm

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


 - posted May 31, 2018 01:53 PM      Profile for Billy Blair     Send New Private Message       Edit/Delete Post 
Awesome! Thats exactly what I need!! I owe you a beer. [Big Grin]

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Allan Broadfield
Master Film Handler

Posts: 431
From: Bromley, Kent
Registered: Nov 2010


 - posted May 31, 2018 03:10 PM      Profile for Allan Broadfield   Author's Homepage   Email Allan Broadfield   Send New Private Message       Edit/Delete Post 
Wikipedia includes the sprocket dimensions too.

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Billy Blair
Junior
Posts: 20
From: Hove, United Kingdom
Registered: Sep 2017


 - posted May 31, 2018 04:27 PM      Profile for Billy Blair     Send New Private Message       Edit/Delete Post 
@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: 431
From: Bromley, Kent
Registered: Nov 2010


 - posted May 31, 2018 05:09 PM      Profile for Allan Broadfield   Author's Homepage   Email Allan Broadfield   Send New Private Message       Edit/Delete Post 
It appears to give the width and height of the perforation.

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Allan Broadfield
Master Film Handler

Posts: 431
From: Bromley, Kent
Registered: Nov 2010


 - posted May 31, 2018 05:15 PM      Profile for Allan Broadfield   Author's Homepage   Email Allan Broadfield   Send New Private Message       Edit/Delete Post 
It appears to give the width and height of the perforation.

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


 - posted June 01, 2018 03:09 AM      Profile for Billy Blair     Send New Private Message       Edit/Delete Post 
Unfortunately width and height of perforation wasnt enough!

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Allan Broadfield
Master Film Handler

Posts: 431
From: Bromley, Kent
Registered: Nov 2010


 - posted June 01, 2018 03:35 AM      Profile for Allan Broadfield   Author's Homepage   Email Allan Broadfield   Send New Private Message       Edit/Delete Post 
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: 20
From: Hove, United Kingdom
Registered: Sep 2017


 - posted June 01, 2018 04:14 AM      Profile for Billy Blair     Send New Private Message       Edit/Delete Post 
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: 578
From: Campobasso, Italy
Registered: Jun 2013


 - posted June 01, 2018 07:31 AM      Profile for Luigi Castellitto   Email Luigi Castellitto   Send New Private Message       Edit/Delete Post 
My pleasure, Billy!
A good old Ale! [Wink]

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Billy Blair
Junior
Posts: 20
From: Hove, United Kingdom
Registered: Sep 2017


 - posted June 10, 2018 01:23 PM      Profile for Billy Blair     Send New Private Message       Edit/Delete Post 
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.

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Download STL file

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

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Terry Sills
Phenomenal Film Handler

Posts: 1308
From: Weymouth,Dorset,England
Registered: Oct 2012


 - posted June 11, 2018 01:54 AM      Profile for Terry Sills   Email Terry Sills   Send New Private Message       Edit/Delete Post 
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
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From: Hove, United Kingdom
Registered: Sep 2017


 - posted June 11, 2018 03:12 AM      Profile for Billy Blair     Send New Private Message       Edit/Delete Post 
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: 20
From: Hove, United Kingdom
Registered: Sep 2017


 - posted June 22, 2018 09:04 AM      Profile for Billy Blair     Send New Private Message       Edit/Delete Post 
Slightly updated with smoother edges and hole is standard 5mm.

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Download STL 3D File

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Maurice Leakey
Film God

Posts: 5134
From: Bristol. United Kingdom
Registered: Oct 2007


 - posted June 22, 2018 09:39 AM      Profile for Maurice Leakey   Email Maurice Leakey   Send New Private Message       Edit/Delete Post 
Very impressive. What will it be used on?

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

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Billy Blair
Junior
Posts: 20
From: Hove, United Kingdom
Registered: Sep 2017


 - posted June 22, 2018 10:03 AM      Profile for Billy Blair     Send New Private Message       Edit/Delete Post 
Mainly if youre building a telecine or a film cleaner perhaps.

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Dominique De Bast
Film God

Posts: 3836
From: Brussels, Belgium
Registered: Jun 2013


 - posted June 22, 2018 10:37 AM      Profile for Dominique De Bast   Email Dominique De Bast   Send New Private Message       Edit/Delete Post 
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: 20
From: Hove, United Kingdom
Registered: Sep 2017


 - posted June 23, 2018 05:33 AM      Profile for Billy Blair     Send New Private Message       Edit/Delete Post 
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: 1107
From: Dunstable ,Bedfordshire.
Registered: Jan 2005


 - posted June 29, 2018 05:43 AM      Profile for Mark Mander   Email Mark Mander   Send New Private Message       Edit/Delete Post 
Looks great Billy,let us know how it performs,Mark

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Stuart Reid
Jedi Master Film Handler

Posts: 656
From: Worthing, West Sussex, UK
Registered: Feb 2009


 - posted July 13, 2018 09:00 AM      Profile for Stuart Reid   Email Stuart Reid   Send New Private Message       Edit/Delete Post 
Seems to me a 3D printed Film-O-Clean would be a really useful tool!

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