8mm Forum: Elmo 16CL bolt size..?

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Topic: Elmo 16CL bolt size..?

Rich Malmsten
Film Handler

Posts: 41
From: White Bear Lake, MN, USA
Registered: Feb 2017

posted August 13, 2018 06:27 PM

I recently replaced the rubber rollers on an Elmo 16CL. All went well but one of the bolts that attaches the lower front plate was on pretty tight, and its slots got a bit damaged when I took it out. It still is usable, but I'd like to replace it anyway with a new bolt, and stock up on them for future repairs.

I've tied to determine what size it is but haven't been able to. It's small and metric and nothing at the local hardware stores matches it. Does any know the spec on this bolt? (These are the three silver Phillips bolts, not the larger black bolts some models have.)

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Nantawat Kittiwarakul
Master Film Handler

Posts: 280
From: Rajburana, Bangkok, Thailand
Registered: Aug 2017

posted August 13, 2018 09:23 PM

Not 100% certain,but it could be some odd-size metric screw. My Sony camcorder also use tiny M-1.7 screws (or sort of that uncommon size,couldn't remember the exact fugure) which I fortunately attain them from online store to fix it. [Wink]

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Just a lone collector from a faraway land...

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Paul Browning
Phenomenal Film Handler

Posts: 1006
From: West Midlands United Kingdom
Registered: Aug 2011

posted August 14, 2018 03:53 AM

They do have odd size diameter screws on a lot of Japanese products, sometimes its the machining process, where they use machine s to self tap the thread, and you will find the thread looks like it has corners on it, best is to retap with a standard size metric screw thread, will be half a pitch different in most cases, so thread will start and then stop....

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Rich Malmsten
Film Handler

Posts: 41
From: White Bear Lake, MN, USA
Registered: Feb 2017

posted August 17, 2018 07:54 AM

I determined the screw size to be M3-0.50:

diameter = 3mm
thread = 50 per inch
length = 5mm

They are available through Fastenal, part number 91186, for only 4 cents each.

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Paul Browning
Phenomenal Film Handler

Posts: 1006
From: West Midlands United Kingdom
Registered: Aug 2011

posted August 17, 2018 02:31 PM

Do you have access to thread gauges, this may confirm your info. We normally check with a overhead projector with the a pitch gauge drawing magnified with the correct profile, this would be placed in the light path to accurately check. It does not need to be out by much to strip the thread in either if forced......

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Rich Malmsten
Film Handler

Posts: 41
From: White Bear Lake, MN, USA
Registered: Feb 2017

posted August 21, 2018 09:47 AM

The Fastenal clerk and I did check my Elmo screw’s size in his set of standard metric threads and it fit. I will be getting a couple of these screws. If they don’t fit in my projector, I’ll let everyone know.

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Rich Malmsten
Film Handler

Posts: 41
From: White Bear Lake, MN, USA
Registered: Feb 2017

posted August 27, 2018 08:27 AM

I purchased these screws at Home Depot (2 for $0.39) and it fits. These are 6mm long instead of the original 5mm length, but M3-0.50 is definitely the correct specification.

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