How to make a Portal Gun

Step 4 Building up

Now we're building up the profile of the model. This part was made from 18mm plywood shaped out with a router to get a 100mm disc. Drilled a hole in the centre of the disc and screwed a bolt to it so I could but the disc on the drill press, get it spinning and use a file to shape the radius on the disc. Then used the router again to cut out the centre and form a ring with an ID of 75mm (to slide over the barrel) and OD of 100mm all shaped nicely. If you have a big enough radius bit for the router, you can use that, or just painstakingly sand away the shape.

A ring is shaped out of foam from a kneeling garden mat which was thicker and stiffer than the exercise mat. Hot glue the two together and then hot glue the ring onto the barrel.

Comments

[cillen]

What does OD And ID stand for?

[t-ram]

outer diameter an inner diameter