Josh,
I agree with your assessment of why they recommend against extensions.
I used to use a 4:1 multiplier to torque fuse bolts on bomb bodies (650
foot-lb). It is a true challenge to support the multiplier without an
extension. With an extension, I strongly agree with using a support.
The other challenge that was that the extension breaker bar was really
hard on the hands to hold. If you find the multiplier hard to resist,
putting the multiplier in the bilge might be easier. You might want to
be prepared for either option.
Neil Schiller
1983 C&C 35-3, #028
"Grace"
Yes, I was a Rocket Scientist
On 1/15/2018 9:51 AM, Josh Muckley via CnC-List wrote:
Dennis, I'm totally in agreement with your thinking and think you are
envisioning it correctly but I just wanted to check with the
collective wisdom. I wish the multiplier had expounded on their "do
not use extensions" warning.
Josh
On Jan 15, 2018 9:44 AM, "Dennis C. via CnC-List"
<[email protected] <mailto:[email protected]>> wrote:
Hopefully, I'm visualizing the situation correctly. The
configuration I see is the socket on the nut, an extension of X
inches held by a bushing several inches above the socket, then the
multiplier on top of the extension.
I just don't see a difference for the multiplier if the extension
is held firmly. What difference does it make if the multiplier is
1 inch, 12 inches or 24 inches from the socket if the extension is
held where it can't tilt or misalign? See what I'm thinking?
Dennis C.
On Sun, Jan 14, 2018 at 9:15 PM, Josh Muckley via CnC-List
<[email protected] <mailto:[email protected]>> wrote:
That's a pretty good idea Dennis. So I take it that you prefer
getting the multiplier out of the hole and using the handle?
Josh
On Jan 14, 2018 8:16 PM, "Dennis C. via CnC-List"
<[email protected] <mailto:[email protected]>> wrote:
Get some PVC pipe, PVC fittings or some wood pieces and
make a bushing for the hole in the sole to steady the top
of the extension and keep it aligned. Torque away!
Dennis C.
On Sun, Jan 14, 2018 at 6:09 PM, Josh Muckley via CnC-List
<[email protected] <mailto:[email protected]>> wrote:
So now I have a new problem. Keel bolt #4 is down a
deep hole and is constrained to a narrow channel. The
immediate thought is to simply use an extension.
Problem is that the torque multiplier specifically
states to not use an extension... I assume on the
output shaft. I also assume that the reason for this
is to ensure alignment stays perfect while applying
such extreme torque.
So, is it better to brace the handle-less multiplier
in the bottom of the hole while using an extension on
the 1/2" drive input shaft to apply the required
torque? Without a handle I'll shore up the edges of
the hull to attempt to prevent excessive point loads
and crushing.
Or is it better to use a 13" long, 3/4" drive,
extension between the socket and the multiplier to get
the multiplier above the hole? This would allow using
the handle on the multiplier.
Here are some pictures:
https://drive.google.com/folderview?id=1G3HVN_jj0PYa0e5Otk9nwdqVoR4CYTCy
<https://drive.google.com/folderview?id=1G3HVN_jj0PYa0e5Otk9nwdqVoR4CYTCy>
Thanks,
Josh Muckley
S/V Sea Hawk
1989 C&C 37+
Solomons, MD
On Jan 13, 2018 10:35 PM, [email protected]
<mailto:[email protected]> wrote:
It looks like I should have checked my standard
nut/bolt sizes. See the attached chart.
Josh
On Jan 13, 2018 7:54 PM, "Josh Muckley"
<[email protected] <mailto:[email protected]>>
wrote:
The only thing I had close to 1-13/16 was
1-7/8 which seemed to fit the #5 bolt and it
was only best measured as a 1-1/4" stud.
#1 and #7 match, measuring 1" and fit 1-1/2
socket.
Here's the latest chart (* denotes unchecked)
Keel bolts (fwd to aft):
Nut stud
1 - 1 1/2 (38mm) 1 (25mm)
2 - 2 3/16 (56mm) 1 1/2 (38mm)
*3 - 2 1/4 (57mm) 1 1/2 (38mm)
4 - 2 3/16 (56mm) 1 1/2 (38mm)
5 - 1 7/8 (47.5mm)1 1/4 (32mm)
*6 - 2 1/4 (57mm) 1 1/2 (38mm)
7 - 1 1/2 (38mm) 1 (25mm)
*8 - 3/4 (19.5mm) 1/2 (13mm)
Josh
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Each and every one is greatly appreciated. If you want to support
the list - use PayPal to send contribution --
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Thanks everyone for supporting this list with your contributions. Each and
every one is greatly appreciated. If you want to support the list - use PayPal
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every one is greatly appreciated. If you want to support the list - use PayPal
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