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Post by aas on May 16, 2021 1:40:25 GMT -5
I have a fair amount of Fermacell to cut (not sure what's called elsewhere - Hardie board, gypsum fibre board etc.)
After having a look at the blade offerings from Mafell (ouch!) and Festool (expensive but not quite as painful) - I settled on a 160mm from Bosch, found it on promo for 36€. Cuts very well and the Starmix is dealing with the dust.
I've read that gypsum dust kills tools - so I guess the MT55 will need a proper clean out after this, but with the dust extraction and cutting on to a work table hardly and airborne dust - half mask on just in case!
Makita autofeed doesn't have the torque for sinking the heads - I've got the correct screws - but the tool runs at 4000 revs and stalls out when the head hits the board. I also have the DFS452 autostart cordless drywall tool and the autofeed attachment - this is also 4000 revs/min but has enough torque for sinking the heads - it's hard work though!
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Post by alvychippy on May 16, 2021 10:27:04 GMT -5
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Post by aas on May 16, 2021 14:10:55 GMT -5
First one is the DFR550 - classic autofeed gun but in 18v cordless - high speed but no torque Second one is DFS452 drywall screwdriver with separate autofeed attachment - is brushless, has a bit more torque
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Post by alvychippy on May 16, 2021 15:27:38 GMT -5
Normally hardyback gets either nailed or predrilled and screwed, as if you use ordinary "drywall" screws they'll keep on snapping, if you try to drive them the same way as plasterboard. I've seen decking screws in strips (softer, less breakable) slow thread and they have edges on sharper coned heads - might work better? Like
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Post by kraftt on May 16, 2021 18:10:46 GMT -5
Whenever I’ve cut hardie siding (full sheets) or drywall I make sure to bring my tapered 50mm to 38mm hose - wanting max extraction. If it’s not a lot of material I’ll skip the cyclone/separator to go straight to a fleece bag.
I think Eoj has mentioned a preference for using his KSS400 with a 4 tooth blade for cement board. Makita makes a 100mm dia 20mm arbor 16 tooth blade they say is designed for fiber cement = A-90439. But there must be a 4 tooth out there. Probably CMT.
btw - is it their flooring or siding you are installing?
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Post by aas on May 17, 2021 10:10:55 GMT -5
I'm using the proper screws... the heads countersink themselves, double thread, in to metal studwork - the boards jack up if there is not enough pressure on the screw gun
It's for interior walls
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Post by alvychippy on May 17, 2021 13:30:39 GMT -5
I'm using the proper screws... the heads countersink themselves, double thread, in to metal studwork - the boards jack up if there is not enough pressure on the screw gun It's for interior walls Hilti then, it is! , bin mukhyta...
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Post by aas on May 17, 2021 14:15:40 GMT -5
I like the look of the Hilti drywall gear, plus the SDS. I don't about elsewhere, but in France Hilti is prohibitively expensive... I'm saying that as an owner of quite a selection of Mafell and Festool...
I had the Festool drywall screwdriver with autofeed - sold it for two reasons - one I was fed up of the Festool 18v platform, two the autofeed kept jamming, and giving it a small shake used to release it so I could carry on working - either that or the whole autofeed attachment would come off and go flying across the room!.. the only tool left on Festool was the HKC55 which was a great tool. Interestingly, the Festool drywall screwdriver also comes in a high torque / low speed 2500 rev/min version - probably would be ideal for Fermacell.
I ended up going back to Makita as I'd had 3 and they weren't 'that' bad, and they're cheap. I do a little mod on the nose that stops jamming - first thing when I get one - out comes the grinder and turn the hole in the nose into an upside down 'U'.
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