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Circle Cutting Jig ( for the bandsaw) #3: Recent modifications

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Blog entry by BritBoxmaker posted 1169 days ago 1666 reads 3 times favorited 5 comments Add to Favorites Watch
« Part 2: Of slidey things Part 3 of Circle Cutting Jig ( for the bandsaw) series no next part

One obvious failing on the jig was pointed out by Trevor (tdv) in that with the sliding table away from the right hand side of the blade the workpiece is unsupported on this side and could suffer chipout. Good point so

Version 2.1 -TDV modification
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A small piece of beech is fixed to the jaw of the left fixed table to act as a sacrificial zero clearance jaw. The corresponding cutout is made in the sliding table jaw to accommodate this and allow the jaw to still close up.
As its screwed into place this is replaceable when worn.

Version 2.2 – N6DSW modification

Also from Dave (N6DSW) comes the idea for an index marker for the guide pin.
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I use this against a hand held ruler but you could also attach a scale to the fixed runner opposite this. I need time to find a suitably stout scale and route it in.

Any more suggestions are warmly welcomed and yes you will get a mention, as above

As I mentioned in the comments section of the last part of the blog Please DO clamp the jig down tho the bandsaw table for safety reasons! (my mitre slot rail is just so tight I’ve not done this yet, naughty me).

Be seeing you.

-- Martyn -- Boxologist, Pattern Juggler and Candyman of the visually challenging. http://www.theartofboxes.com



5 comments so far

View TopamaxSurvivor's profile

TopamaxSurvivor

14409 posts in 2178 days


#1 posted 1169 days ago

Good ideas, thx

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

View lilredweldingrod's profile

lilredweldingrod

2492 posts in 1609 days


#2 posted 1169 days ago

Hey Martyn, I’m switching my shop over to metrics. Do you want an Imperial yard stick? lol I’m sorry, I just could not resist. This is a beautiful jig. and the tutorial is awesome. Thank you for taking the time and effort to show this to us. Rand

View BertFlores58's profile (online now)

BertFlores58

1635 posts in 1425 days


#3 posted 1168 days ago

Hi Martyn,
Suggest that on the center pin, bearing or bush should be fitted. The wear in tear will be present and it will create much error. I used the EBONY bush or the MOLAVE (not common in your place) as they have oil in them. The best wooden bush is Lignum vitae..

I am eager and wants to design circular pattern this time. I will make one of this for my portable router. Thanks for the blog.

-- Bert

View SPalm's profile

SPalm

4619 posts in 2384 days


#4 posted 1168 days ago

I like the zero clearance modification. I was wondering about that. I was envisioning a sliding one underneath the sliding table. Yours seems much simpler. Nice mod.

Steve

-- -- I'm no rocket surgeon

View mafe's profile

mafe

9242 posts in 1592 days


#5 posted 1168 days ago

Really a wonderful jig, a well done blog and some cool details.
Thank you Martyn for taking your time to share this,
Best thoughts,
Mads

-- Mad F, the fanatical rhykenologist and vintage architect. Democraticwoodworking.

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