Hmn,
I had the recommendations of a machinist as to RPM and lubricant. And as
to drill type and diameter. I researched the thing. I still messed
up. I went to a pro.
It's done, now five years done, and as far as I'm concerned well done.
I've had no problems.
Good luck on finding an actual machinist who is willing to work on
deep, thick lead that may have some sort of stone ( say concrete ) fill
in it. And who is willing to take his machines to your marina.
My man knew what he was doing: I saw the bit shavings, and they were
long, clean, and bright. There were a hell of a lot of them.
Rudy B.
Philip J Agur wrote:
Drilling lead takes a different chip breaker angle on the bit and
lubrication. Otherwise is going the lead is going to gall up on the
cutting edges seize. A hammer drill is a pretty hack way of breaking
up the chip. It would be better to find an actual machinist. Since
lead is not the most common thing to machine expect he'll need to
research how the drill is sharpened in the machinist handbook. You
should also ask for RPM and cutting fluid recommendations.
Phil Agur s/v Wing Tip
<http://www.catalina27.org/public_pages/profile270.htm>
Secretary, Call Sign WCW3485
IC27/270A MMSI 366901790
www.catalina27.org <http://www.catalina27.org> Vessel Doc# 1039809
-----Original Message-----
From: [email protected]
[mailto:[EMAIL PROTECTED] On Behalf Of Rudolph S. Behar
Sent: Monday, June 23, 2008 3:04 PM
To: [email protected]
Subject: Re: catalina27-talk: Keel bolts
I tried to do it myself and ended by breaking two new and strong steel
bits. Local yardman did the work for me. Siad it took him 7 hours.
I know him and believe him. HE used a 3/4th hammer drill. And it
cost. No problems since.
If I had to do it over again I'd not partner the old bolts, but set
the new ones (six of them) in a fresh pattern at some remove from the
originals. I've had no problems, but it seems good sense not to be
too close to the originals. The old bolts seemed to be ferrous. I
put in stainless for the new ones.
Rudy B.
Phoenix, #2237
Pasadena
James Calleran wrote:
Listees,
After a, ahem, hard grounding, my Catalina smile has reappeared
(last seen 6-7 years ago) -- not badly, but a thin line at the keel
joint is visible on one side. The boatyard service manager has
recommended re-torque-ing the keel bolts. Naturally, the yard will do
the job for a fee, though I don't have a quote. I'm concerned about
these 30 yr-old bolts breaking off under 60+ ft-lbs of torque.
Any of you who have done this yourselves:
1. How did you clean off the accumulated rust (They were rusty, right)?
2. Were you able to budge the nuts?
3. Did you remove them --one at a time, of course -- and clean the
threads?
4. Did you replace with stainless nuts?
5. What torque?
For those who have installed SS Lag Bolts in your keel.
1. Did you buy the $279.95 kit from Catalina Direct? (5 bolts, 1
drill bit, washers)
2. What size is the drill bit?
3. Did drilling require a rotary hammer type drill, or just a powerful
standard drill?
I have source of SS 1/2" x 8" SS lag bolts @ 14.95 each. Specs
say 18-8 stainless; no mention of 316. Thoughts on using these?
Thanks for comments on your experience.
Fair Winds,
Jim Calleran, C27 #2784, Trad, OB
Mathews Yacht Club, VA
37°27.8'N/76°18.6'W
