LumberJocks

Jigs... #2: Bandsaw circle cutting jig

  • Advertise with us
Blog entry by Hoakie posted 1630 days ago 5565 reads 12 times favorited 10 comments Add to Favorites Watch
« Part 1: Log Sled for Bandsaw Part 2 of Jigs... series no next part

Another staple jig for the bandsaw is the circle cutting Jig. I created this from ideas on the internet, can’t remember the exact site but if you do a search you’ll find it.

1) The center part slides out with a pin near the end to act as the pivot point

2) The radius of the circle is measured from the blade to the pivot point

3) Fence aligns the jig to table, the knob locks the pivot slide in place

4) penny is used to distribute pressure across slide which presses it against the top of the jig

5) The left side of the jig clamps down on the table to secure it in place. Front clamp:

Back clamp:

This jig can be theoretically be used to cut a circle with a diameter up to 72” by turning the slide around in the slot. However, I can’t image that that would be practical or fun to try.

Thanks for looking

-- John H. [To invent, you need a good imagination and a pile of junk. ~Edison]



10 comments so far

View a1Jim's profile

a1Jim

112000 posts in 2179 days


#1 posted 1630 days ago

Great job John

-- http://artisticwoodstudio.com Custom furniture

View OutPutter's profile

OutPutter

1194 posts in 2592 days


#2 posted 1629 days ago

John, good job on the jig and thanks for posting it. I’ve never understood how these things work. How do you get a piece of wood with a diameter of 10” on a pivot point 8” from the blade? Baffles me anyway.

Best,

-- Jim

View TopamaxSurvivor's profile

TopamaxSurvivor

14609 posts in 2278 days


#3 posted 1629 days ago

I like it :-)

-- "some old things are lovely, warm still with life ... of the forgotten men who made them." - D.H. Lawrence

View richgreer's profile

richgreer

4522 posts in 1676 days


#4 posted 1629 days ago

Thank you for posting. I need a circle jig for my bandsaw and this post gave me some very good ideas.

-- Rich, Cedar Rapids, IA - I'm a woodworker. I don't create beauty, I reveal it.

View Hoakie's profile

Hoakie

306 posts in 2638 days


#5 posted 1627 days ago

Outputter,

I usually start by drilling the the pivot hole so the distance from one side corresponds to the radius of the circle.

-- John H. [To invent, you need a good imagination and a pile of junk. ~Edison]

View OutPutter's profile

OutPutter

1194 posts in 2592 days


#6 posted 1626 days ago

I see, I think. So, you start with a square or rectangular piece of wood (that will become a circle) that has at least two sides that are twice the radius of the finished circle apart? That way you can just put the wood on the pivot point and snug it up against the blade along one of the sides of the square wood?

-- Jim

View Hoakie's profile

Hoakie

306 posts in 2638 days


#7 posted 1626 days ago

That is correct, I’ve also seen where people will notch the board to accept the blade. Here is a good video demonstrating the concept.

-- John H. [To invent, you need a good imagination and a pile of junk. ~Edison]

View Bill Hall's profile

Bill Hall

166 posts in 2468 days


#8 posted 833 days ago

Soooo, I built mine, but it didn’t work so well. I got part way into the circle and the blade started seizing. I suppose one needs to adjust for the blade drift? Any tips?

-- http://www.tenoclockwoodworks.com

View Hoakie's profile

Hoakie

306 posts in 2638 days


#9 posted 832 days ago

Sorry to hear that Bill, I have not had that issue, but here are a few quick thoughts for you to consider.

1) Is the blade width narrow enough to accommodate the radius of your circle?
2) Have you tried rounding over the back of your blade with a file?
3) Is the pivot pin aligned with the tips of the teeth on the blade?

-- John H. [To invent, you need a good imagination and a pile of junk. ~Edison]

View Bill Hall's profile

Bill Hall

166 posts in 2468 days


#10 posted 832 days ago

Thanks for the reply. I’m an idiot…I didn’t have the pivot point aligned with the blade. It was too far forward. All is well now. :)

-- http://www.tenoclockwoodworks.com

Have your say...

You must be signed in to post the comments.

DISCLAIMER: Any posts on LJ are posted by individuals acting in their own right and do not necessarily reflect the views of LJ. LJ will not be held liable for the actions of any user.

Latest Projects | Latest Blog Entries | Latest Forum Topics

HomeRefurbers.com

Latest Projects | Latest Blog Entries | Latest Forum Topics

GardenTenders.com :: gardening showcase