1. Nuts, bolts, pretty much everything: McMaster, Grainger, MSCDirect
2. Tooling & fixture components: Carr-Lane
3. Machine tools: Iscar, kennametal, see #1
4. Automation stuff: Misumi, see #1
5. Metal bar stock: onlinemetals.com, see #1

That's all I can think of for the moment, but there are a lot more that I go to for specific stuff.

 

Hi Kaar,
Let's have a look on online catalog page powered by Cadenas, you can find hundred of manufacturers

 

I also use Misumi for automation, press dies and plastic mold. Misumi provide CAD data so that it is more effective in design.
For the special part, I prefer to use ACME for precision part, THK for linear bushing, NSK for ball screw etc.
But for standard parts available in CAD programs (SolidWorks) such as gear, bearing, bolt, nut, etc., it's more effective if we use solidworks library.

 

hello kaar,Have you considered to make custom parts by overseas manufacturer?We are a professional CNC machine shop in China,we can make kinds of custom made parts according customers' drawings,our service includes:CNC machining,CNC milling,CNC turning,Swiss Screw machining,CNC rapid prototyping,wire cutting and engineering design.You can contact me [email protected] if you are interested.

Baron.G

 

McMaster also has a lot of 3-D models associated with their products that you can download for free

 

We tried to buy some screws from Mcmaster webiste, however they told us they will not sell to overseas directly.

 

Great info above! For quick release fasteners I would suggest Protex latches and Ojop latches: https://www.ojopsweden.com/toggle-latches/

 

You can find anything on google these days

 

There are some prototyping company can make custom parts for you. Just send them your design files and then they will make it for you. for example you can try our company's services. https://www.rpproto.com