Reply
 
Thread Tools Search this Thread
 
Old 11 February 2014, 15:34   #21
RIBnet supporter
 
mick's Avatar
 
Country: UK - England
Town: Wakefield
Boat name: Bouncer
Make: Redbay Stormforce
Length: 6m +
Engine: 2x Honda 90Hp
MMSI: 235025718
Join Date: Jun 2009
Posts: 3,984
Quote:
Originally Posted by Poly View Post
would vaseline or silicone grease be better than copper-slip? - in that cleaning copper-slip off the internal threads will be a PITA but you don't want to leave a smear on there to accelerate dissimilar metal corrosion when the final assembly is done?
Nah copper slip is the stuff for SS and plenty of it as well it picks up so easy
__________________
mick is offline   Reply With Quote
Old 11 February 2014, 17:00   #22
RIBnet supporter
 
Pikey Dave's Avatar
 
Country: UK - England
Town: South Yorks
Boat name: Black Pig
Make: Ribcraft
Length: 5m +
Engine: DF140a
MMSI: 235111389
Join Date: Feb 2008
Posts: 7,590
RIBase
Quote:
Originally Posted by Poly View Post
would vaseline or silicone grease be better than copper-slip? - in that cleaning copper-slip off the internal threads will be a PITA but you don't want to leave a smear on there to accelerate dissimilar metal corrosion when the final assembly is done?
Vaseline & Silicone won't stop the stainless from picking up, they don't have any EP properties. Plus you don't want silicone anywhere near resin. Dissimilar metal corrosion won't be an issue with the tiny amounts involved, no need to clean off the Copperslip after laminating, in fact, get some more in.
__________________
Rule#2: Never argue with an idiot. He'll drag you down to his level & then beat you with experience.
Rule#3: Tha' can't educate pork.
Rule#4: See rule#5
Pikey Dave is offline   Reply With Quote
Old 11 February 2014, 17:32   #23
Member
 
Country: Finland
Town: Helsinki
Boat name: SR 5.4
Make: Avon
Length: 4m +
Engine: Toh1 3,5 Yam 90/2S
Join Date: Oct 2009
Posts: 896
Think teflon tape, on the treads of the bolt(high enough )would do the trick?
__________________
fun on a boat is inversely proportional to size...sort of anyway
C-NUMB is offline   Reply With Quote
Old 12 February 2014, 04:33   #24
Member
 
Country: Ireland
Town: Castlebar
Boat name: Clewless
Make: Valiant DR 490
Length: 4m +
Engine: 60 hp ETEC
MMSI: Awaitng one
Join Date: Oct 2007
Posts: 1,239
RIBase
What is "Picking up"?
__________________
two stroke mick is offline   Reply With Quote
Old 12 February 2014, 05:52   #25
RIBnet supporter
 
Pikey Dave's Avatar
 
Country: UK - England
Town: South Yorks
Boat name: Black Pig
Make: Ribcraft
Length: 5m +
Engine: DF140a
MMSI: 235111389
Join Date: Feb 2008
Posts: 7,590
RIBase
Quote:
Originally Posted by two stroke mick View Post
What is "Picking up"?
Here you go
The problem is usually worse in tapped holes in fabrications, as the threaded holes tend to be hand cut. Captive welded nuts are even worse. If you do get a bolt picking up, you are in for some pain, prevention is MUCH better than the cure. Copperslip is the usual answer, but even then I've had fastners pick up, no fun when it's an M20 bolt Normally you would just cut it off & start again, in your case with a glassed in fab, you need to be careful.
When you come to start screwing fixings into the matrix, use lube, go slow & if it suddenly starts to get tight without bottoming out, leave it to cool & slowly unscrew it. Inspect the male thread & it will show signs of damage as if it's been put in cross threaded. Bin the male thread & run a 3rd tap into the hole to clean the female thread & start again.
Try to buy good quality fastners, not all stainless is born equal There is a lot of unbranded imported stuff around & it's sh1te, we've found that "Tigges" and "THE" brands have fewer problems, but even they pick up.
__________________
Rule#2: Never argue with an idiot. He'll drag you down to his level & then beat you with experience.
Rule#3: Tha' can't educate pork.
Rule#4: See rule#5
Pikey Dave is offline   Reply With Quote
Old 12 February 2014, 07:23   #26
Member
 
Country: Ireland
Town: Castlebar
Boat name: Clewless
Make: Valiant DR 490
Length: 4m +
Engine: 60 hp ETEC
MMSI: Awaitng one
Join Date: Oct 2007
Posts: 1,239
RIBase
Will I get copper slip at a motor factors or is this an internet type of purcahse?
__________________
two stroke mick is offline   Reply With Quote
Old 12 February 2014, 07:49   #27
SPR
Trade member
 
SPR's Avatar
 
Country: UK - Scotland
Town: Central Belt of Scotland
Boat name: Puddleduck III
Make: Bombard
Length: 5m +
Engine: 50 HP
Join Date: Mar 2009
Posts: 2,066
Quote:
Originally Posted by two stroke mick View Post
Will I get copper slip at a motor factors or is this an internet type of purcahse?
motor factors , used on brakes - do mean assembly of brakes not on discs!
__________________
SPRmarine / SPRtraining
RYA Training Courses & Safety Equipment Sales
SPR is offline   Reply With Quote
Old 12 February 2014, 07:51   #28
Member
 
hamster's Avatar
 
Country: UK - England
Length: 4m +
Join Date: Aug 2006
Posts: 196
Halfords and most other motor factors or chandlers will sell copper slop. Usually comes in a tube but they also do tubs of it depending how much you need.
__________________
Freelance skipper, RYA Powerboat Trainer and Advanced Examiner
hamster is offline   Reply With Quote
Old 26 February 2014, 04:53   #29
Member
 
Country: Ireland
Town: Castlebar
Boat name: Clewless
Make: Valiant DR 490
Length: 4m +
Engine: 60 hp ETEC
MMSI: Awaitng one
Join Date: Oct 2007
Posts: 1,239
RIBase
Glassed in the Deck Matrix

Last night I glassed in the deck matrix with 4 layers of 300 gsm CSM. I used less than 2.5: 1 resin to CSM so delamination should not be a problem and at the same time ensured that the CSm was fully wetted out.
Photo 1 shows the deck ready to be glassed. The treadthed bar is in place to tear through the CSM.
Photo 2 is just after the glassing
Photo 3 was taken this morning after the glass has gone off.
The resin was mixed at 1 % with the resin and the temp in the shed last light was 8-10 degrees C
TSM

Question do you think that 4 layers is sufficent of you would add another 2 layers of 300gsm CSM?
The materix has been screwed in along with Sikaflex bond
Attached Thumbnails
Click image for larger version

Name:	Matris ready for glassing in.jpg
Views:	93
Size:	114.4 KB
ID:	91531   Click image for larger version

Name:	Matrix just after 4 layers of 300gsm matting.jpg
Views:	101
Size:	136.1 KB
ID:	91532   Click image for larger version

Name:	Matrix after CSM has gone off.jpg
Views:	110
Size:	146.4 KB
ID:	91533  
__________________
two stroke mick is offline   Reply With Quote
Old 18 March 2014, 12:39   #30
Member
 
Country: Ireland
Town: Castlebar
Boat name: Clewless
Make: Valiant DR 490
Length: 4m +
Engine: 60 hp ETEC
MMSI: Awaitng one
Join Date: Oct 2007
Posts: 1,239
RIBase
I have managed to glass in the deck matrix and get it reasonably flat so the seat will not rock on it. I originally planned to use a jockey seat with an internal flange but then re-considered after reading about must ribs experiance. I have placed a timber (marine ply) base onto the base of the jockey seat. This was sikaflexed. I then glassed over the ply with 6 layers of 300 gsm CSM. This arrangement should re-distribuit the forces generated on the bolts and prevent pull through or the shearing of the flange on the seat. See base of jockey seat below. Plan to flow coat over the CSM to match the colour of the deck.
Attached Thumbnails
Click image for larger version

Name:	Single jockey seat glassed base.jpg
Views:	104
Size:	109.7 KB
ID:	92288  
__________________

__________________
two stroke mick is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off





Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 19:53.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.