Whistles are a vital tool for dealing with ICE agents, and groups are printing them by the bucket. I am helping with those groups, but I wanted to make a change by adding a handcuff key to the design. I measured a spare key, modeled it in OpenSCAD, and added it to an existing whistle model.
The first iteration was no good, and I discovered that the key I measured would not fit into any cuffs I owned. For the second attempt, I measured the lock. The second print fit, but when I turned it, the plastic cracked. The final test was with a filament printer, and the resolution was noticeably worse. I could not fit the key into the lock because the printer had to make the wall thicker than would fit into the cuffs. I cannot think of a way to make this design work with the material.
The rest of the posts for this project have been arranged by date.
First time here?
Completed projects from year 1
Completed projects from year 2
Completed projects from year 3
Completed projects from year 4
Completed projects from year 5
Completed projects from year 6
Completed projects from year 7
Completed projects from year 8
Completed projects from year 9
Completed projects from year 10
Completed projects from year 11
Completed projects from year 12
Disclaimer for http://24hourengineer.blogspot.com and 24HourEngineer.com
This disclaimer must be intact and whole. This disclaimer must be included if a project is distributed.
All information on this blog, or linked by this blog, is not to be taken as advice or solicitation. Anyone attempting to replicate, in whole or in part, is responsible for the outcome and procedure. Any loss of functionality, money, property, or similar, is the responsibility of those involved in the replication.
All digital communication regarding the email address 24hourengineer@gmail.com becomes the intellectual property of Brian McEvoy. Any information contained within these messages may be distributed or retained at the discretion of Brian McEvoy. Any email sent to this address, or any email account owned by Brian McEvoy, cannot be used to claim property or assets.
Comments to the blog may be utilized or erased at the discretion of the owner. No one posting may claim property or assets based on their post.
This blog, including pictures and text, is copyright to Brian McEvoy.
2026-01-25
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| Handcuff key shaft and flag |
The first iteration was no good, and I discovered that the key I measured would not fit into any cuffs I owned. For the second attempt, I measured the lock. The second print fit, but when I turned it, the plastic cracked. The final test was with a filament printer, and the resolution was noticeably worse. I could not fit the key into the lock because the printer had to make the wall thicker than would fit into the cuffs. I cannot think of a way to make this design work with the material.
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| Three REVs and no luck |
The rest of the posts for this project have been arranged by date.
First time here?
Completed projects from year 1
Completed projects from year 2
Completed projects from year 3
Completed projects from year 4
Completed projects from year 5
Completed projects from year 6
Completed projects from year 7
Completed projects from year 8
Completed projects from year 9
Completed projects from year 10
Completed projects from year 11
Completed projects from year 12
Disclaimer for http://24hourengineer.blogspot.com and 24HourEngineer.com
This disclaimer must be intact and whole. This disclaimer must be included if a project is distributed.
All information on this blog, or linked by this blog, is not to be taken as advice or solicitation. Anyone attempting to replicate, in whole or in part, is responsible for the outcome and procedure. Any loss of functionality, money, property, or similar, is the responsibility of those involved in the replication.
All digital communication regarding the email address 24hourengineer@gmail.com becomes the intellectual property of Brian McEvoy. Any information contained within these messages may be distributed or retained at the discretion of Brian McEvoy. Any email sent to this address, or any email account owned by Brian McEvoy, cannot be used to claim property or assets.
Comments to the blog may be utilized or erased at the discretion of the owner. No one posting may claim property or assets based on their post.
This blog, including pictures and text, is copyright to Brian McEvoy.
2026-01-25
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