Little Dorrit
Well-Known Member
I need to cut a 20cm diameter hole in a piece of 10mm ply. Any suggestions on how bet to do this? Jigsaw? If so how?
Cutting a hole
- Thread starter Little Dorrit
- Start date
Lon nan Gruagach
Well-Known Member
Mark out:
Pin and string
Print a circle and trace
Big dividers...
Drill a 10mm (or what ever you need to clear the jigsaw bit)hole near to but inside your circle.
Jigsaw spirally out to the hole
If you cannot get the finish you want then nibble away with the jigsaw till you are close as you feel comfortable.
Finish with half round rasp.
Pin and string
Print a circle and trace
Big dividers...
Drill a 10mm (or what ever you need to clear the jigsaw bit)hole near to but inside your circle.
Jigsaw spirally out to the hole
If you cannot get the finish you want then nibble away with the jigsaw till you are close as you feel comfortable.
Finish with half round rasp.
Hadenough
Well-Known Member
https://www.toolstation.com/shop/Po...lesaws/sd1530/Bosch+Progressor+Holesaw/p41835
But I have to say if you are asking the question you probably need someone else to do the job.
But I have to say if you are asking the question you probably need someone else to do the job.
Seashoreman
Well-Known Member
Draw your 20cm circle. Drill a hole just inside the circumference that is a little larger than jigsaw blade. Fire up jigsaw and carefully follow the circle.
Simple but effective?
RichardS
N/A
Little Dorrit
Well-Known Member
I have to say if you are posting this you probably need someone to read the post to you
Phill
Well-Known Member
Little Dorrit
Well-Known Member
Methinks your Jigsaw skills are better the mine
Blue Sunray
Well-Known Member
Little Dorrit
Well-Known Member
very interesting!
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knuterikt
Well-Known Member
Router with a circle jig
[video]https://m.youtube.com/watch?feature=youtu.be&v=gLpEuqNn07Q[/video]
[video]https://m.youtube.com/watch?feature=youtu.be&v=gLpEuqNn07Q[/video]
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Hadenough
Well-Known Member
Good point 
. So in that case it is jigsawable - if you know what you are doing :encouragement:
. So in that case it is jigsawable - if you know what you are doing :encouragement:
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waynes world
Well-Known Member
Oh you can get the hole saw needed
https://www.ebay.co.uk/itm/110-200m...hash=item568cce1b1c:m:mFkVO_vk6nQ7-eew17P9gGQ
but depends on the DIYer, if they have the gear to drill the hole. jig or drill. either way is easy.
if it is close to the edge enough then a coping saw will do, but can you use one ?
https://www.ebay.co.uk/itm/110-200m...hash=item568cce1b1c:m:mFkVO_vk6nQ7-eew17P9gGQ
but depends on the DIYer, if they have the gear to drill the hole. jig or drill. either way is easy.
if it is close to the edge enough then a coping saw will do, but can you use one ?
pvb
Well-Known Member
You could try an adjustable hole saw; it should cope OK with 10mm ply. Couple of examples...
https://www.toolstation.com/shop/Po...ill+Bits/sd1120/Adjustable+Hole+Cutter/p44999
https://www.screwfix.com/p/erbauer-adjustable-holesaw-with-cowl-9-piece-set/2571v
https://www.toolstation.com/shop/Po...ill+Bits/sd1120/Adjustable+Hole+Cutter/p44999
https://www.screwfix.com/p/erbauer-adjustable-holesaw-with-cowl-9-piece-set/2571v
VicS
Well-Known Member
Easy with a jig saw !
But cut with the front side down so that any splintering of the top layer of the ply is on the back and make sure the work is well clamped down. I'd clamp it across a couple of saw horses
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GrahamM376
Well-Known Member
The Silverline one from Toolstation works OK, I've been using one on mdf.
john_morris_uk
Well-Known Member
Or get a reverse cutting blade? I use them regularly and they are very good for keeping a clean edge on the 'top' side.
https://www.screwfix.com/p/bosch-t101br-wood-jigsaw-blades-bayonet-74mm-5-pack/15283
If you want a clean edge on both sides then you need a jig and a router. Or a suitable former and a pattern cutting router bit.
d4dunmor
Active Member
If you ever need a presice / precision job you can always use a router with a guide bush and a template takes longer but if it needs a precise hole this should give good results.
GrahamM376
Well-Known Member
The only problem with that is that you first have to cut a precision hole to be able to use the guide bush or a cutter with bearing.
nemodreams
Well-Known Member
By the time you have spent posting here you couuld have hand cut it with a padsaw !
You can do a hole with a jigsaw by mounting it on beam and then just spinning it - but 20cm is a little small for that really - and not worth the fuss to set up.
A router trimmer would eat it and be quick - but you still need some sort of circle cutting fitting.- but it would be vey sweet and clean.
You can be very accurate with a jigsaw - at that thickness. New blade fine cut.
Practice first !
You can do a hole with a jigsaw by mounting it on beam and then just spinning it - but 20cm is a little small for that really - and not worth the fuss to set up.
A router trimmer would eat it and be quick - but you still need some sort of circle cutting fitting.- but it would be vey sweet and clean.
You can be very accurate with a jigsaw - at that thickness. New blade fine cut.
Practice first !
