ToughButterCup Posted January 17, 2023 Share Posted January 17, 2023 (edited) Is there such a thing? Edited January 17, 2023 by ToughButterCup Link to comment Share on other sites More sharing options...
markc Posted January 17, 2023 Share Posted January 17, 2023 Can you explain more? Why do you need to cut from inside? I have seen a rod with a blade set into it that expands as you rotate to cut from the inside, needs to be bore specific tho Link to comment Share on other sites More sharing options...
MikeGrahamT21 Posted January 17, 2023 Share Posted January 17, 2023 (edited) https://www.amazon.co.uk/Superior-Tool-37516-Internal-Cutter-One/dp/B004Q05TTC ?? Or with a guide to help guage depth: https://www.reedmfgco.com/en/products/plastic-pipe-tools/internal-pipe-cutters/ Edited January 17, 2023 by MikeGrahamT21 Link to comment Share on other sites More sharing options...
twice round the block Posted January 17, 2023 Share Posted January 17, 2023 A honing tool, which is lots of cutting balls attached to spring steel. Available in different sizes, but only good for removing small amounts of material. https://www.amazon.co.uk/BGS-1265-Honing-Tool-flexible/dp/B07XZRGNGJ/ref=asc_df_B07XZRGNGJ/?tag=googshopuk-21&linkCode=df0&hvadid=443259906233&hvpos=&hvnetw=g&hvrand=1315534557284720573&hvpone=&hvptwo=&hvqmt=&hvdev=m&hvdvcmdl=&hvlocint=&hvlocphy=1006490&hvtargid=pla-891460498067&psc=1&tag=&ref=&adgrpid=103776439380&hvpone=&hvptwo=&hvadid=443259906233&hvpos=&hvnetw=g&hvrand=1315534557284720573&hvqmt=&hvdev=m&hvdvcmdl=&hvlocint=&hvlocphy=1006490&hvtargid=pla-891460498067 Link to comment Share on other sites More sharing options...
ProDave Posted January 17, 2023 Share Posted January 17, 2023 Perhaps Ian could describe what he wants to cut and where? 1 Link to comment Share on other sites More sharing options...
ToughButterCup Posted January 17, 2023 Author Share Posted January 17, 2023 I need to trim this MVHR Inlet back by about 15mm. Currently, I'm (was) thinking that I need(ed) to fit a 'stop' of some sort inside the outlet, and then trim tight-up against that - .... unless there's such a thing a self-centring cutting thingamajig ..... meanwhile The BH Collective comes up trumps. Thats what I need @MikeGrahamT21, a depth stop attached to a cutter shaft (with a cutting blade on it) . Self-centring is a distraction . A problem shared is halved innit. Yer a star Mr Graham. Thanks. Thanks @twice round the block good idea, BUT ; we'd better keep @pocster away from one of those hadn't we..... 2 Link to comment Share on other sites More sharing options...
Conor Posted January 17, 2023 Share Posted January 17, 2023 I had a couple of those. Just used the 5" grinder with a fine blade and went round it. I'll have to touch up the paint on the ceiling tho! Link to comment Share on other sites More sharing options...
ProDave Posted January 17, 2023 Share Posted January 17, 2023 9 minutes ago, ToughButterCup said: Thats what I need @MikeGrahamT21, a depth stop attached to a cutter shaft (with a cutting blade on it) . Self-centring is a distraction . Just be carefull that looks like it has potential to remove a finger if you don't treat it with respect. Link to comment Share on other sites More sharing options...
Pocster Posted January 17, 2023 Share Posted January 17, 2023 Just multi tool the thing - easy ! Link to comment Share on other sites More sharing options...
jack Posted January 17, 2023 Share Posted January 17, 2023 46 minutes ago, pocster said: Just multi tool the thing - easy ! I did exactly that when faced with this problem. Took no more than a minute or two per inlet/outlet. In my case, the vent completely covered the slightly ragged edge that was left. @ToughButterCup, is that door going to clear the outlet/inlet once it's installed? Link to comment Share on other sites More sharing options...
ToughButterCup Posted January 17, 2023 Author Share Posted January 17, 2023 1 hour ago, jack said: .... @ToughButterCup, is that door going to clear the outlet/inlet once it's installed? The end in mind is to 'countersink' the outlet such that the vent assembly sits sufficiently far above the finished ceiling to be clear of the opening door. To do that, I need to cut inside the outlet. Since I can't simply remove it, trim and replace it, I need to cut up inside' the outlet by about 12 mm. And then re-fit the vent. Making sure that cut is clean and level was exercising what's left of my brain. 1 Link to comment Share on other sites More sharing options...
Pocster Posted January 17, 2023 Share Posted January 17, 2023 34 minutes ago, ToughButterCup said: The end in mind is to 'countersink' the outlet such that the vent assembly sits sufficiently far above the finished ceiling to be clear of the opening door. To do that, I need to cut inside the outlet. Since I can't simply remove it, trim and replace it, I need to cut up inside' the outlet by about 12 mm. And then re-fit the vent. Making sure that cut is clean and level was exercising what's left of my brain. Can’t you just get a nice round plastic disc with a grill and use that as an outlet ? A flat ‘vent’ effectively Link to comment Share on other sites More sharing options...
ToughButterCup Posted January 18, 2023 Author Share Posted January 18, 2023 18 hours ago, pocster said: Can’t you just get a nice round plastic disc with a grill and use that as an outlet ? A flat ‘vent’ effectively Yes. But I need to be able to 'tune' the inlet. So I need a proper inlet fitting. It's the one nearest the MVHR unit, (2m away) so I suspect I will need to throttle that particular inlet back a good bit. Link to comment Share on other sites More sharing options...
Pocster Posted January 18, 2023 Share Posted January 18, 2023 7 minutes ago, ToughButterCup said: Yes. But I need to be able to 'tune' the inlet. So I need a proper inlet fitting. It's the one nearest the MVHR unit, (2m away) so I suspect I will need to throttle that particular inlet back a good bit. Fill it with expanding foam . Then once cured poke holes in it to get required flow 👍 Link to comment Share on other sites More sharing options...
markc Posted January 18, 2023 Share Posted January 18, 2023 16 minutes ago, pocster said: Fill it with expanding foam . Then once cured poke holes in it to get required flow 👍 Could be a home remedy for a few medical conditions 😉 1 Link to comment Share on other sites More sharing options...
Pocster Posted January 18, 2023 Share Posted January 18, 2023 1 minute ago, markc said: Could be a home remedy for a few medical conditions 😉 Expanding foam has just so many uses … Link to comment Share on other sites More sharing options...
ToughButterCup Posted January 18, 2023 Author Share Posted January 18, 2023 Builder's foam p!$$es me off big-time. Have a read - at my expense. 1 Link to comment Share on other sites More sharing options...
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