andyfish Posted August 25, 2009 Share Posted August 25, 2009 How do,after buying a bow roller the other week i intend to fit it myself and was wondering what type of drill bit to use on the grp as iam worried about causing cracks Andy Quote Link to comment Share on other sites More sharing options...
Happy Days Posted August 25, 2009 Share Posted August 25, 2009 I Have been thinking of fitting a bow roller also where did you purchase yours from? Afraid I don't know what drill bits to use but would have though normal metal drill bits would be ok. Regards Bob Quote Link to comment Share on other sites More sharing options...
andyfish Posted August 25, 2009 Author Share Posted August 25, 2009 bought it from jeckells at oulton broad Bob Andy Quote Link to comment Share on other sites More sharing options...
Antares_9 Posted August 25, 2009 Share Posted August 25, 2009 Good sharp HSS bit is fine Andy, drill the holes a couple of sizes up from the bolts and countersink slightly the holes to allow the sealant to fill the gap and seal the bolt holes better. Whilst you're at it countersink the underside of the roller holes slightly, make sure you put a good backing plate on the underside too. If you find the deck is "cored" when you drill then open the outer part with a good hole saw (one or tiles is best on Gelcoat) and fill with epoxy then after it has cured re drill. BTW you can be sure of a chip free perfect hole using a diamond powder tipped drill but you need to ask if it’s worth it as you are going to cover it in Sikaflex and a bow roller. Quote Link to comment Share on other sites More sharing options...
andyfish Posted August 25, 2009 Author Share Posted August 25, 2009 Thanks Antares,what do you mean by cored? Andy Quote Link to comment Share on other sites More sharing options...
Antares_9 Posted August 25, 2009 Share Posted August 25, 2009 Some Decks (in fact some hulls) are constructed as a sandwich of GRP and another material which can be foam, balsa, ply etc. these are strong enough and reduce weight. Strong enough except in one area, compression, (ply aside) this means that putting bolts through and winding them up can crush it and cause cracking, a large surface area inside and outside can help in this respect as can filling the core with epoxy resin using the method I described. IF it is foam the job can be enhanced further by raking some of the foam out. Quote Link to comment Share on other sites More sharing options...
andyfish Posted August 25, 2009 Author Share Posted August 25, 2009 From what ive seen of the underside of where iam drilling looks like its not cored as there are other bolts coming through so should be ok,but thanks for your good advice as usual ! Andy Quote Link to comment Share on other sites More sharing options...
Boaters Posted August 25, 2009 Share Posted August 25, 2009 Hi Andy ,Just fitted a bow roller on our Bounty 28 which we got from Norfolk Marine .Its about 5-6 inches in length and was about £26 .Follow all the previous advice and you wont go far wrong. Quote Link to comment Share on other sites More sharing options...
andyfish Posted August 25, 2009 Author Share Posted August 25, 2009 Sounds good to me Andy Quote Link to comment Share on other sites More sharing options...
RedRover Posted August 25, 2009 Share Posted August 25, 2009 Hi Andy ,Just fitted a bow roller on our Bounty 28 which we got from Norfolk Marine .Its about 5-6 inches in length and was about £26 .Follow all the previous advice and you wont go far wrong. Roy,You have finally fitted it. Quote Link to comment Share on other sites More sharing options...
senator Posted August 25, 2009 Share Posted August 25, 2009 Andy, Is that an Alpha 32 dual steer I see there? they were always our favourite boat when we hired, loads of roon, handle great and look and feel like a real boat. You will probably find that your layup is either solid or thick ply so hopefully there will be no need for backfilling. Good luck. Ian Quote Link to comment Share on other sites More sharing options...
Boaters Posted August 25, 2009 Share Posted August 25, 2009 Yes Barry at last got round to it.Always jobs to do !!!!!!!!! Quote Link to comment Share on other sites More sharing options...
andyfish Posted August 25, 2009 Author Share Posted August 25, 2009 Andy, Is that an Alpha 32 dual steer I see there? they were always our favourite boat when we hired, loads of roon, handle great and look and feel like a real boat. You will probably find that your layup is either solid or thick ply so hopefully there will be no need for backfilling. Good luck. Ian I wish it was,no its a ocean 30 Ian Andy Quote Link to comment Share on other sites More sharing options...
C.Ricko Posted August 25, 2009 Share Posted August 25, 2009 From what ive seen of the underside of where iam drilling looks like its not cored as there are other bolts coming through so should be ok,but thanks for your good advice as usual ! Andy If there is a plywood pad to spread weight it may be worth doing the same, the easy way to see if it is cored is by how far the drill bit has to travel. Quote Link to comment Share on other sites More sharing options...
senator Posted August 25, 2009 Share Posted August 25, 2009 Lovely boats as well, first boat we looked at when we were thinking of buying and if the one we were veiwing had not been a total shed I am certain we wold have bought it. Ian Quote Link to comment Share on other sites More sharing options...
andyfish Posted August 25, 2009 Author Share Posted August 25, 2009 Have got a piece of wood for my spreader Clive,more bothered about chipping the new paint! Andy Quote Link to comment Share on other sites More sharing options...
C.Ricko Posted August 25, 2009 Share Posted August 25, 2009 Have got a piece of wood for my spreader Clive,more bothered about chipping the new paint! Andy Well just use a fast drill and dont press too hard Quote Link to comment Share on other sites More sharing options...
andyfish Posted September 6, 2009 Author Share Posted September 6, 2009 Fitted the bow roller last weekend (bank holiday weekend) easy peasy only took me an the lad 1 hour to do sorry to all those moored at fleet dyke last saturday as there was a fair bit of huffing and chuffing when i got my head stuck in forrard locker underneath the bow area where we fitted the bow roller Andy Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.