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Thread: Trimming corner keys
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31st August 2018, 02:37 PM #1GOLD MEMBER
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Trimming corner keys
Found this picture on FBook. Who trims their corner keys with a bandsaw? I would imagine it to be a bit risky
cutting keys.jpgregards,
Dengy
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31st August 2018, 05:35 PM #2GOLD MEMBER
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Joe, not me. I use tape, a Japanese flush saw and a sanding block.
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31st August 2018, 05:41 PM #3
I agree with Fumbler...Japanese flush cut Saw and sanding block...works for me. Always tape the corners before cutting the slots.
And my head I'd be a scratchin'
While my thoughts were busy hatchin'
If I only had a brain.
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31st August 2018, 06:32 PM #4
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31st August 2018, 10:00 PM #5
My guess is a school workshop with nobody to warn of the possible consequences!!!
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31st August 2018, 11:18 PM #6GOLD MEMBER
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Hi Dengue,
i don’t use slipfeathers very often, but I have trimmed them with a bandsaw. Not as shown in your pic, though!! I can’t immediately lay my hands on a photo of the jig, but it is similar in concept to this one:
96F832DC-5679-4341-BE3A-0AED4E7A36D6.jpeg
The bandsaw blade is ‘buried’ in a ply or mdf fence so the blade is a fraction inboard of the edge. Running a box along this fence keeps the sides of the box a fraction away from the blade whilst trimming off the slipfeathers. It still requires some final touching up with a block plane or sander, but it is pretty reliable.
Happy slicing!
Brian
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1st September 2018, 12:20 AM #7
Homeys' post #6 is spot on.
This simple offset jig is a miracle and I use it often. I make 30 boxes at a time (they aren't fancy) and every edge and corner needs a trim. This jig is one I use all the time.
It needn't be a small notch, it can be quite wide (as in left/right) but is only the length of the blade to fit within it. The width of the offcut can simply be adjusted, but for this job you'd make it within a millimetre.... let me find some pictures....
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1st September 2018, 08:18 AM #8
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1st September 2018, 08:45 AM #9GOLD MEMBER
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The photo in the original post shows someone freehand cutting. Note the box is not running along a fence - it’s about 50mm away. The risk is to the box. One small shake of the hand and you’ve cut into the box. Much better to use a jig which prevents damaging all your hard work.
Brian
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1st September 2018, 08:59 AM #10
Ahhhh... risk to the box? That's something I hadn't considered. But I'll admit I assumed the fence was being used and the gap was there because the photo was staged. I made this assumption based on the observation that there wasn't enough blade showing for the box to fit through.
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1st September 2018, 03:39 PM #11
I've found I can shave an edge to a whisker amount by passing the workpiece back to front. The workpiece rides on the flat part of the blade, and only the blade's set does the final cutting. Works on both wood and aluminum.
Cheers,
JoeOf course truth is stranger than fiction.
Fiction has to make sense. - Mark Twain
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1st September 2018, 05:02 PM #12GOLD MEMBER
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Thanks everyone for these comments and contributions. In the past I have tried a router in a jig that sits on each surface, with the router bit just above the surface. Too easy to dig into the box sides.
Now I use the flush saw, remove the blue masking tape, then use a flat wide and very sharp chisel to finish it off. No need to sand it.
Will give homey's offset jig a go, looks good.regards,
Dengy
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1st September 2018, 06:11 PM #13GOLD MEMBER
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Hi Dengue,
I first saw this jig in Andrew C’s workshop in the UK, so all credit to him.
Brian
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1st September 2018, 07:59 PM #14GOLD MEMBER
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That band saw technique looks like an accident waiting to happen if you ask me. If you are making just one box then you could have them removed with a hand saw quicker than it would take to set up the band saw.
I'm all about being proficient at hand tools so for me no matter if it's 1 or 10 boxes i would do it by hand.
Still practicing.
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2nd September 2018, 03:58 PM #15
Would be a high risk operation damage wise to the box and the slips & it would need to be a fine tpi blade as well.
Reminds me of David Pye's writing,
"One of Pye's best known concepts is "the workmanship of risk", by which he means "workmanship using any kind of technique or apparatus, in which the quality of the result is not predetermined, but depends on the judgment, dexterity and care which the maker exercises as he works (The Nature and Art of Workmanship, p. 20)."Mobyturns
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