DorsetStrider
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| posted on 8/5/10 at 08:34 PM |
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Fishmouths
Hiya guys.
Just wanted some opinions on the best way to cut fish mouths? Any bright sparks dreampt up and easy way?
Who the f**K tightened this up!
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scutter
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| posted on 8/5/10 at 08:37 PM |
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Try TUBEMITER. Works perfectly.
ATB Dan.
The less I worked, the more i liked it.
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JoelP
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| posted on 8/5/10 at 08:39 PM |
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i tried a holesaw in a pillar drill and its hard work even if doing 90 degs. Never used the tubemitre prog but people do say it works well. Definately
an effective cheap solution.
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RichardK
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| posted on 8/5/10 at 08:54 PM |
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2nd for tubemitre, superb bit of software.
Cheers
Rich
Gallery updated 11/01/2011
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Badger_McLetcher
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| posted on 8/5/10 at 08:57 PM |
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One way of doing it, though a bit more labour intensive!
Basically get an old bog roll and cut up one edge. Then wrap it around the piece of steel you want to fishmouth and gaffer/masking tape it so
it's the right diameter.
Then you hold it against where the component has to fit and using a pair of scissors hack away until you have the right profile.
This is then slipped over the tube to be cut, the profile transferred with a marker pen and the tube attacked with an angle grinder!
Probably not as pretty as the other options but it works 
If disfunction is a function, then I must be some kind of genius.
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mangogrooveworkshop
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| posted on 8/5/10 at 09:07 PM |
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Holesaw is the easy way.
http://www.mechwerks.com/Coping.htm
[Edited on 8-5-10 by mangogrooveworkshop]
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handyandy
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| posted on 8/5/10 at 09:24 PM |
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holesaw is good if you have a regular fishmouth to cut but i use a flap disc to extend the mouth if i need a "long" angled fishmouth, it
takes a little practice but i do all the wishbone cross braces that i make this way, ( and i,ve made a few )
basically I use a jig , cut the tube over long & keep "fettling" until the tube fits perfectly in the wishbone jig.
cheers
andy
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zilspeed
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| posted on 8/5/10 at 09:51 PM |
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The last fishmouths I did were the ones between the main roll hoop and the front facing braces on a mid engined chassis.
Dissimilar tube sizes, compound mitre angle.
I'm afraid it was a case of edging up to a good fit via a marker pen and an angle grinder.
Hole saw works well for single angles or 90 degree cuts though.
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liam.mccaffrey
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| posted on 8/5/10 at 09:51 PM |
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I have a medford tools notcher which is great.
http://www.youtube.com/watch?v=QnubbAFVObQ
For complicated or difficult stuff I jig and fettle
Build Blog
Build Photo Album
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Steve Hignett
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| posted on 8/5/10 at 11:06 PM |
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I will have a tube notcher for sale very soon... (if you're interested!)
I can tell you how many times it's been used if you need to know!!! (OR YOU CAN
COUNT YOURSELF! )
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