1984 Grady 242 Caribbean Transom Repair (+ other stuff)

Questions about boat repairs with our resins and fiberglass: hull patches, transoms and stringers, foam, rot etc.
Fuzz
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Re: 1984 Grady 242 Caribbean Transom Repair (+ other stuff)

Post by Fuzz » Wed Jun 13, 2018 12:23 am

I use mine all the time. At this point trying to build without one would be about imposable.
I have the rockwell sonic crafters. I am on number 2. The first one was an original one with the hex head bolt to attach the blades with. I was glad when it died so I could get the latest and greatest model. It is an F-50. I think there is an F-70 out now. The newer one is a far better tool and easier to use in all ways.



fallguy1000
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Re: 1984 Grady 242 Caribbean Transom Repair (+ other stuff)

Post by fallguy1000 » Wed Jun 13, 2018 9:50 am

My current HF oscillates in multiple ways. The engine rpms are oscillating now.

:doh:
My boat build is here -------->

viewtopic.php?f=12&t=62495

DAYTRIP
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Re: 1984 Grady 242 Caribbean Transom Repair (+ other stuff)

Post by DAYTRIP » Wed Jun 13, 2018 8:49 pm

If you use a sharp chisel to get down to the last ply you can then use an 8” grinder with 24 grit disk to sand the rest away. Brute force!

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Re: 1984 Grady 242 Caribbean Transom Repair (+ other stuff)

Post by fallguy1000 » Wed Jun 13, 2018 10:25 pm

DAYTRIP wrote:
Wed Jun 13, 2018 8:49 pm
If you use a sharp chisel to get down to the last ply you can then use an 8” grinder with 24 grit disk to sand the rest away. Brute force!
Inplement of destruction, but might be needed here.
My boat build is here -------->

viewtopic.php?f=12&t=62495

DAYTRIP
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Re: 1984 Grady 242 Caribbean Transom Repair (+ other stuff)

Post by DAYTRIP » Thu Jun 14, 2018 11:01 am

Gliding the grinder is key. Digging it in ....not good

IpswichGrady
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Re: 1984 Grady 242 Caribbean Transom Repair (+ other stuff)

Post by IpswichGrady » Thu Jun 14, 2018 12:08 pm

Ok.... what’s the difference?

Fuzz
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Re: 1984 Grady 242 Caribbean Transom Repair (+ other stuff)

Post by Fuzz » Thu Jun 14, 2018 2:00 pm

Light touch, keep it close to flat, and move quickly. If you do not it will dig in before you know it.

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Re: 1984 Grady 242 Caribbean Transom Repair (+ other stuff)

Post by DAYTRIP » Thu Jun 14, 2018 2:33 pm

It will honestly make quick work out of it. You can see when you are getting to the glass. Honestly you can’t do anything catastrophic as you are redoing it anyway. I always use it on prep work like this. It will make mountains of dust!

When I say digging in I mean don’t put a lot of pressure on. Let the disk eat. Folks get impatient/tired of holding on to the tool and want instant progress. With a grinder that creates divits. Keep the tool moving and watch what is happening. Usually you can get the wood to a point that it is thin (1/32) and then simply run the chisel under it and off it comes. Explore a little.

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Re: 1984 Grady 242 Caribbean Transom Repair (+ other stuff)

Post by IpswichGrady » Fri Jun 15, 2018 8:19 am

I have taken the protection off of my 4" grinder and am using 40 grit disks. Can't find any coarser disks. Luckily my local tractor supply had a 5 pack of those 40grt DeWalt disks for $14.
DAYTRIP wrote:
Thu Jun 14, 2018 2:33 pm
When I say digging in I mean don’t put a lot of pressure on. Let the disk eat. Folks get impatient/tired of holding on to the tool and want instant progress. With a grinder that creates divits. Keep the tool moving and watch what is happening. Usually you can get the wood to a point that it is thin (1/32) and then simply run the chisel under it and off it comes. Explore a little.
I have managed to create my own technique. It's working... just dusty work

Im a week behind my week ago schedule. Hopefully I will be able to get a lot done this weekend. '

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Re: 1984 Grady 242 Caribbean Transom Repair (+ other stuff)

Post by IpswichGrady » Fri Jun 15, 2018 8:21 am

I have a resin question.... When putting down a layer of resin, if it cures 100% before the next layer is applied why do you need to sand it smooth? I mean, if it is in a area that is not seen does it really matter? or does it have something to do with bonding principles?

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