Dr.Al
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- Messages
- 2,215
- Location
- Gloucestershire, UK
Just some simple blocks for hand-sanding. I've got one I bought many years ago, but it's impossible to get the sandpaper under enough tension.
I saw this design on a video sometime a long, long time ago and making some has been on my list for ages. I was casting around for something to do and put my hands on a few blocks of plastic that came out of a skip a while ago, so I thought I'd just get on with it. Bars are 10 mm mild steel; o-ring grooves are 4 mm and the o-rings are a random size out of the selection pack that seemed to fit. All the blocks are a slightly different size to one another as each is the biggest I could get out of the chunks of plastic I had. From how easily it machined, I think it's probably acetal.
The two that aren't assembled in the picture aren't quite finished yet: I need to make the steel bars (basically cut them to length and stick a groove in them for the o-ring) and file the corners of the o-ring slots so the o-rings aren't going over any sharp corners.
I saw this design on a video sometime a long, long time ago and making some has been on my list for ages. I was casting around for something to do and put my hands on a few blocks of plastic that came out of a skip a while ago, so I thought I'd just get on with it. Bars are 10 mm mild steel; o-ring grooves are 4 mm and the o-rings are a random size out of the selection pack that seemed to fit. All the blocks are a slightly different size to one another as each is the biggest I could get out of the chunks of plastic I had. From how easily it machined, I think it's probably acetal.
The two that aren't assembled in the picture aren't quite finished yet: I need to make the steel bars (basically cut them to length and stick a groove in them for the o-ring) and file the corners of the o-ring slots so the o-rings aren't going over any sharp corners.