As Jim Tolpin’s article on sectors from the June 2011 issue is getting into the hands of readers, we have had a few questions about the tool.
One question is, of course: “Where can I buy one?”
I don’t recommend you try to purchase a real sector. They are small affairs that were intended more for calculations on the drafting board – not in the shop. You can easily make your own from two sticks and a hinge, which is what I did last week here on the blog.
Or you can put one of the millions of substandard folding rules back into service as a sector.
This morning I took a modern folding rule that had assorted problems (warpage, poor wood selection, coarse markings) and turned it into a sector that folds up and stores compactly.
You can find plenty of folding rules in poor shape at flea markets and on eBay. I see them go for as little as 50 cents. Then it takes about 15 minutes of sanding and knife work to create a simple sector.
— Christopher Schwarz
You can read the full article in the June 2011 issue of Popular Woodworking Magazine.