Pass Along HSM
November 08

A Quick and Easy Compass
by by H. D. Candland

I thought you might be interested in this….

While working on a project, I needed to draw a fairly large circle (approximately 8-10 inches in diameter) on aluminum plate. Due to the size of the circle, I did not have anything in my toolbox that would allow me to draw this circle. I do have a machinist's compass from many years ago, but could not reach this dimension. The gimmick shown in the drawing was my answer to this problem.

Someone wishing to make this compass just needs two small scrap blocks. I used aluminum for mine but just about anything would work. After drilling the 3/8"-diameter holes, I drilled the marker hole to .413" to fit the Helix marker that I used. Four 10-24 screws, 1/2" long, were used to clamp the blocks to the steel rod and also clamp the marker and pivot in place. I hope this helps someone out.

Thanks H.D.! Your subscription has been extended by an issue.

Get Involved!
Do you enjoy our e-mail tips? Has one of them ever "knocked something loose" in your head? Would you like to have your magazine subscription extended? Your tip could be a future email blast from your favorite magazine. Just send your tips to gbulliss@villagepress.com. Thank you for your consideration!

Please do us a tremendous favor and forward this e-mail on to your machining friends!

Are you not a subscriber to THE HOME SHOP MACHINIST? Visit us at www.homeshopmachinist.net and request a no-obligation issue, or call and request it at 1-800-447-7367. Tell them you received an e-mail from a friend!

Your friend thinks you’ll enjoy HSM, or you wouldn’t have this e-mail!


We hope you enjoyed this e-mail tip, brought to you by your friends at The Home Shop Machinist , dedicated to precision metalworking.

To unsubscribe to these pass along tips just send this email message.

Go to the Pass Along Archive