Number of parts and fasteners
Another example: take a simple iron that stops working. You decide to try to repair it yourself. With most products nowadays you will be screwing, cutting and forcing it to come apart. You will end up with a lot of parts and often still not be able to locate the problem or replace that one bit that is broken. But imagine if this iron was made out of only 5 parts and there is no usage of fasteners such as glue or epoxy to keep everything together. It would make it much easier to replace a faulty piece without having to replace the whole product. It would also have a positive impact on the environment when consumers would stop replacing the whole product just because a small section is broken, and start repairing it instead.
Worldwide the guidelines have been set for DFD regarding fasteners, and these are easy to follow if you ask us. The first one is that you minimize the number of fasteners
. Nobody wants to have a tray full of screws after dismantling a small product; imagine losing one screw! The second one is that you should minimize the number of tools required
to disassemble. Your grandfather might have a shed full of tools, but not all households do. You don’t want to have to purchase an expensive toolset when it is cheaper and easier to just replace the product. So another important principle is that the fasteners should be easy to remove
, which saves time and effort during disassembly. This means that in production there is no use of glue or epoxy, so that makes it possible to take something apart. And last but not least the fastening points should be easy to access,
so you do not have to ask your small niece to reach for a screw simply because your hands would not fit.
Make sure to remember the DFD guidelines:
- Minimize the number of fasteners
- Minimize the number of tools required to remove fasteners
- Fasteners should be easy to remove
- Fastening points should be easy to access