Reply With QuotePersonally I'd use the second one, maybe drill a pilot hole first
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I’m doing some garden work and need to drill a fairly large hole in a fence post - 28mm diameter. My question for the TZ faithful who are good with woodworking is this.....
Which of these is the correct drillbit - do they do the same thing or if not what’s the difference?
Personally I'd use the second one, maybe drill a pilot hole first
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Depending on how thick the post is the spade bit should suffice.
Take care when drilling through the other side. You might want to clamp another bit of wood to the post where you’ll come through so as to limit any splintering.
B
The first one is a hole saw rather than a drill bit. It is meant for cutting all the way through a relatively thin object. If the object is thicker than the depth of the saw part then it simply won’t go through (and you fence post will be much much thicker!)
Use the second one. Or even better, try and get an auger drill bit
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Auger would be best or a Forster bit
Spade bits ( second photo) ok but as soon as the point protrudes, stop and come at it from the other side to avoid unsightly “break out”
Ok sounds good. I think my main concern will be whether the bit is long enough - time will tellOriginally Posted by GOAT
Holesaws can be used for thicker wood. When you reach the depth limit: remove the saw, break out the plug with a chisel & drill again.The first one is a hole saw rather than a drill bit. It is meant for cutting all the way through a relatively thin object. If the object is thicker than the depth of the saw part then it simply won’t go through (and you fence post will be much much thicker!)
Use the second one. Or even better, try and get an auger drill bit
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(Woohoo, look at me everyone, I've got an iphone. Ner ner nah ner nerrrr.)
I find it easier to drill a straight hole with a holesaw than with a spade bit.
Most spade bits will burn out unless its a good quality. As mentiond Augar bit will do.
If you use the spade bit don't drill a pilot hole.
Started out with nothing. Still have most of it left.
Auger drill bit like this set:
https://www.screwfix.com/p/erbauer-a...et-6-pcs/9296v
Auger bit is the bit of choice when I'm handing garden gates etc
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Yup just ordered one.
You don’t won’t to drill a pilot with the second one!
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You don’t want to drill a hole with the second!
Defo want an auger. Much easier to use than a spade bit if it’s a thick bit of wood. You don’t even need to push.
I use the spade drills (because I have quite a few)when they are held in my milling machine chuck and the wood is clamped down and they do a decent job but when used in a hand held drill I find they can produce a really rough arsed job especially when they break out, as above the Auger drills are the way to go.
Great advice guys thanks. It’s for a rope to go through
Not for spying on the neighbour's daughter, then ?Great advice guys thanks. It’s for a rope to go through
#disappointed
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Neighbours daughter is 58. That ship has sailed my friend
Maybe the great grand-daughter then...Neighbours daughter is 58. That ship has sailed my friend
Spade drill.
Drill about 10-20 mm at a time.
Clear out the hole as you go.....wait for the drill bit to cool down before you go again.
Get someone to keep an eye out for the drill breaking through the reverse side, then stop, and finish the hole from the reverse.
IMO for what is worth go with an auger especially given the diameter of the hole a spade drill would do it but can be difficult to control
I FEEL LIKE I'M DIAGONALLY PARKED IN A PARALLEL UNIVERSE
If you go down the route then clamp another peice of wood to the back, will avoid breakout
Decided to go augur - thanks to all.
Or mark the depth with a bit of tape or use the depth stop on the drill ? Just had to step some holes in a bit of 4x2 and marked the depth on the drill bit with tape - worked well.
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