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Post by Deleted on Mar 1, 2007 10:39:46 GMT
Hi John [Baggo] Keep them in the freezer (hide in the out of date frozen peas at the back  until ready for use). How long do we need to defrost them before use?, and is it Ok to refreeze any we don't use??  |
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Post by steammadman on Mar 3, 2007 23:49:13 GMT
yeh, but if you do re-freeze don't eat em
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Post by aardvark on Mar 7, 2007 13:34:28 GMT
Hello everyone, yes I'm a newcomer to this absorbing hobby too. Enjoying spending my lunch hours reading about people's experiences. So here's my trivial question, associated with rivetting. I'm sure I've read somewhere (but can't remember where), that the countersink should be drilled with an oversize drill, not a standard countersink bit. Something to do with giving a cleaner finish. With the prospect of intending to fit some 5" gauge hornblocks to 3mm plate with 3/32" steel rivets (yes I can work in both systems), any advice please from the experts, what size drill to use to effect the countersink, and what depth to go or even diameter to drill?
I think it's small details like this, that make this site so fascinating.
Regards.
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Post by ron on Mar 7, 2007 16:39:20 GMT
Hi, welcome to the forum, whilst not claiming to be an expert at anything other than beer drinking, I've just finished rivetting 6 bornblocks on with 3/32" rivets. I used a 45deg milling cutter for the countersinks and took them out to about 3/16" as the rivets I had filled the countersinks nicely at that size with the minimum of filing. I think the 45deg cutter gives a better countersink than a bigger drill for rivetting, others may disagree.
Ron
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Post by Peter W. on Mar 7, 2007 20:31:44 GMT
I think the 45deg cutter gives a better countersink than a bigger drill for rivetting, others may disagree. Ron Well, I'm open to correction, but thought the bigger drill gives 90 degrees at the surface, so (a) Less likely for the hole to show (b) More secure I think that LBSC said that the wider drill needn't be very deep. 20 thou maybe for 'our' sizes ? |
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Post by ron on Mar 7, 2007 23:21:38 GMT
Hi Peter, could you explain the 90degs to the surface bit please?
Ron
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Post by Shawki Shlemon on Mar 8, 2007 6:23:16 GMT
I am an ex aircraft engineer ,to be technically right there is a countersink bit with a guide so that the countersink is concentric and will not grab specially in soft metals . But for what we are doing all of you are correct and will do the job .  |
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Post by Peter W. on Mar 9, 2007 20:10:45 GMT
Hi Peter, could you explain the 90degs to the surface bit please? Oh, sorry Ron -- I just meant that the wider drill will go straight into the metal, rather than the 45 degree angle of a countersink. i.e. _ _ instead of _ _ | | \ / P.S. The wider drill -- about 20% bigger. What do others use ? |
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until ready for use).
