Setting precision angles

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Blog series by Boatman53 updated 12-21-2012 05:05 AM 3 parts 29522 reads 42 comments total

Part 1: The bevel board

12-08-2012 10:17 PM by Boatman53 | 17 comments »

I often read posts from people having trouble setting angles on machines or wherever. So I thought I’d share what I’ve learned over the last thirty years, and I realized I’ve been using, thinking and in some cases obsessing about angles for a long time. My first career was a land surveyor, and obviously that was nothing if not angles and distances, down to degrees, minutes and seconds.┬áBut I moved on from surveying to wooden boat building in 1982 and have been doing that eve...

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Part 2: The Sine Bar

12-10-2012 02:50 AM by Boatman53 | 15 comments »

The sine bar The next leap for me in setting angles precisely was the rediscovery of the sine bar. My father was a tool and die maker and although I never worked in his shop I did become familiar with the tools of the trade. The only sine bar I had seen however was 3” long.Then Fine Woodworking ran an article in the July/August 1992 issue called Simple Instrument Sets Precise Angles by Tom Rose. In it he described how to make a 10” sine bar and use it to set a miter gauge. ...

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Part 3: The framing square

12-21-2012 05:05 AM by Boatman53 | 10 comments »

The framing square The bevel board and the sine bar, as good as they are, have one drawback, lack of portability. One was big and the other is a bit awkward to set a bevel gauge. Enter these little tools. I used them for many years they are good, two of them being Starretts,but they are too small to offer any real accuracy. The scale is only two inches from the pivot and the width of the index lines is almost equal to 1/4 degree. The late Dan Sutherland, a boatbuilder, produced a st...

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