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Thread: What are these bits?
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24th May 2020, 03:14 PM #1Senior Member
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What are these bits?
The ones with the four prongs appear to be for creating plugs, what are the ones with the rings, and how to use them?06A3D0CA-7B79-41F0-9AAF-312BBFFDF642.jpeg
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24th May 2020 03:14 PM # ADSGoogle Adsense Advertisement
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24th May 2020, 03:23 PM #2Taking a break
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I'm pretty sure they're all plug cutters, just 2 different styles
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24th May 2020, 03:37 PM #3
Agree with Elan. I find it far easier, and safer, to use them in a drill press.
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24th May 2020, 03:41 PM #4Taking a break
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Oh yeah, definitely in a drill press and on a fairly slow speed; they're only carbon steel so spinning too fast will burn up the cutting edge
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24th May 2020, 04:27 PM #5rrich Guest
Absolutely! Use in a drill press!
These bits produce tapered plugs. Don't try to drill all the way through a piece of 19mm timber. Just drill 12mm or so deep. After drilling all the plugs plus 6 or 8 extra, take a blade screw driver and a slight twist between plug and wall of the hole will pop the plug loose.
When you go to use the plugs, remember that the bottom of the plug is the widest part. Use glue sparingly to hold the plug in place. After the glue has cured, sand the plug flush. If you are using plugs made from the same timber as the project, try to align the grain as that will make the plug almost invisible.
I always preferred to make plugs from a contrasting bit of timber. Ebony in particular makes a very attractive contrasting plug.
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24th May 2020, 04:51 PM #6Senior Member
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I think I put the plug in upside down. No wonder it needed a hammer and still left a gap:/
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24th May 2020, 08:11 PM #7Senior Member
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Ah damn. Didn’t notice plug cutters imperial, holes metric. Drilled out to next larger size to make plug fit: 13mm > 1/2”. Still doesn’t fit, and hole is bigger. Fill and refinish time. Sod it.
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25th May 2020, 01:48 PM #8Senior Member
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Looks like the second type can cut longer plugs
Archer 8 Piece Plug cutter Set | Carbatec
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25th May 2020, 06:16 PM #9
They can, although I've found they're slower to cut. (Unless you force 'em, in which case you're just as likely to end up with short plugs anyway.)
The 4-prong type have a tendency to 'break off' plugs short as they're nearing their max depth, particularly if the cutter is a dirty inside or beginning to blunt. Charred tapers are a good sign it needs some attention.
I always slip the 'wrong' end of the drill bit into the 4-prong type to double-check for size before moving on. It should be a snug fit long before it reaches bottom. If I want a plug that's 7-10mm tall (my usual size) then the drill bit only needs to go into the plug cutter by 4-5mm before stopping.
- Andy Mc
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