Plastic vials on Parts List -- discrepancy

Plastic vials on Parts List -- discrepancy
Posted by Thomas Tosh at 2017-12-26 10:33:17

The part designation for the plastic vials to house the motors is "Film Canister - 35 mm or Plastic Vial - 50 ml" 

It is fair to caution builders that a 50ml vial is going to be significantly larger than the 35mm canisters that ship with the SeaPerch kits. In other words, the McMaster-Carr part number shown -- 4611T24 -- is NOT a good match. 

A 35mm film canister contains slighly more than 35 ml, so a 50 ml vial is going to be 40% larger. It would be extremely helpful if the Parts list was updated to identify what the Kit actually contains. (It has not been updated in nearly five years, and there are two more parts discrepancies that I know of.) 

Re: Plastic vials on Parts List -- discrepancy
Posted by Kevin Garner at 2018-01-17 16:58:43

Hi, Thomas!

I believe the "35mm" you speak of refers to the film size and not the actual size of the container.  It's a film canister for photographers, to store their 35mm camera film before and after use.

That being said, I'm interested in seeing the vial from McMaster-Carr.  I always just used the film canisters in the SeaPerch kits, but the vial might be a great alternative!

Thomas Tosh wrote on 2017-12-26 10:33:17:

The part designation for the plastic vials to house the motors is "Film Canister - 35 mm or Plastic Vial - 50 ml" 

It is fair to caution builders that a 50ml vial is going to be significantly larger than the 35mm canisters that ship with the SeaPerch kits. In other words, the McMaster-Carr part number shown -- 4611T24 -- is NOT a good match. 

A 35mm film canister contains slighly more than 35 ml, so a 50 ml vial is going to be 40% larger. It would be extremely helpful if the Parts list was updated to identify what the Kit actually contains. (It has not been updated in nearly five years, and there are two more parts discrepancies that I know of.) 



Re: Plastic vials on Parts List -- discrepancy
Posted by Thomas Tosh at 2018-01-18 14:42:48

Kevin: Believe it or not, I have used 35mm film in my life, but thank you.

Believe it or not, the actual volume of a 35mm film canister is very close to 35ml. No kidding. No more than 35ml plus or minus 1 for the average canister. 

In my opinion, the vial in the McMaster-Carr catalog has great potential to store hardware fasteners, or as a non-childproof container for pills, NOT as a SeaPerch thruster housing. Not only is it way too long, the plastic is very brittle and would easily crack if not drilled carefully. I don't like the cap either. I'm not surprised this is why they are not included in the kits.

I'm attaching a photo that compares them.   

Kevin Garner wrote on 2018-01-17 16:58:43:

Hi, Thomas!

I believe the "35mm" you speak of refers to the film size and not the actual size of the container.  It's a film canister for photographers, to store their 35mm camera film before and after use.

That being said, I'm interested in seeing the vial from McMaster-Carr.  I always just used the film canisters in the SeaPerch kits, but the vial might be a great alternative!

Thomas Tosh wrote on 2017-12-26 10:33:17:

The part designation for the plastic vials to house the motors is "Film Canister - 35 mm or Plastic Vial - 50 ml" 

It is fair to caution builders that a 50ml vial is going to be significantly larger than the 35mm canisters that ship with the SeaPerch kits. In other words, the McMaster-Carr part number shown -- 4611T24 -- is NOT a good match. 

A 35mm film canister contains slighly more than 35 ml, so a 50 ml vial is going to be 40% larger. It would be extremely helpful if the Parts list was updated to identify what the Kit actually contains. (It has not been updated in nearly five years, and there are two more parts discrepancies that I know of.) 





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Re: Plastic vials on Parts List -- discrepancy
Posted by Kevin Garner at 2018-01-21 22:31:45

Hey, Thomas!

Thanks for updating me.  It's getting rare to find someone who actually knows about and has used 35mm film!  haha!  I have literally had to explain what that was to several fellow SeaPerch-ers in my area.  I run with the assumption that most people don't know anymore!  

Thomas Tosh wrote on 2017-12-26 10:33:17:

The part designation for the plastic vials to house the motors is "Film Canister - 35 mm or Plastic Vial - 50 ml" 

It is fair to caution builders that a 50ml vial is going to be significantly larger than the 35mm canisters that ship with the SeaPerch kits. In other words, the McMaster-Carr part number shown -- 4611T24 -- is NOT a good match. 

A 35mm film canister contains slighly more than 35 ml, so a 50 ml vial is going to be 40% larger. It would be extremely helpful if the Parts list was updated to identify what the Kit actually contains. (It has not been updated in nearly five years, and there are two more parts discrepancies that I know of.) 



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