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9A headstock torque
- Thread starter animal12
- Start date
- Replies 10
- Views 1,728
johnoder
Diamond
- Joined
- Jul 16, 2004
- Location
- Houston, TX USA
I'll guess that SB owned no torque wrenches and few of its employees would know one if they saw it
SBLatheman
Titanium
- Joined
- Jul 7, 2008
- Location
- South Bend, In
That is a pretty bold and cold statement, John
SBL used a torque wrench on bolts when/where it was necessary.
Ted
johnoder
Diamond
- Joined
- Jul 16, 2004
- Location
- Houston, TX USA
That is a pretty bold and cold statement, John
SBL used a torque wrench on bolts when/where it was necessary.
Ted
Nothing at all derogatory there Ted, just the inertia of the times
I cite my Packard (the expensive car) tools catalog of about 1930 - showing fussy engine assembly, but zero torque wrenches
I cite the photo of Harry A. Miller in his shop during assembly of one of his Indy dominating straight eight racing engines about 1925 - no torque wrenches
On Edit - to further illustrate the lack of such tools in industry, I'll scan the Packard page in the AM and edit it in here - special t-handle wrenches sold by one of the premier American auto makers exclusively for head bolts and main bearing bolts - that are not torque wrenches
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10KPete
Hot Rolled
- Joined
- Dec 21, 2008
- Location
- Nordland, WA
Still, that was not a nice comment on the people at South Bend.
To answer your question: I've been wrenching for about 65 years and believe I'm qualified to say this; decently very snug. As long as they won't loosen up it's good. DO NOT wrench 'em up farmer tight. I dunno, maybe 15-20 lb ft??
Pete
To answer your question: I've been wrenching for about 65 years and believe I'm qualified to say this; decently very snug. As long as they won't loosen up it's good. DO NOT wrench 'em up farmer tight. I dunno, maybe 15-20 lb ft??
Pete
iwananew10K
Diamond
- Joined
- Sep 12, 2010
- Location
- moscow,ohio
when in doubt refer to MH. Or just look up recommended torque, assume grade 2
Bolt Depot - US Recommended Bolt Torque Table
One of the best mechanics I knew never had a torque wrench so it's not a derogatory comment....he was a funny guy, said torque wrenches were for people that didn't know how to tighten a bolt.
Bolt Depot - US Recommended Bolt Torque Table
One of the best mechanics I knew never had a torque wrench so it's not a derogatory comment....he was a funny guy, said torque wrenches were for people that didn't know how to tighten a bolt.
steve-l
Titanium
- Joined
- Mar 2, 2012
- Location
- Geilenkirchen, Germany
I have to agree with your comment. Point in fact is that torque wrenches are pretty inaccurate as they measure rotational resistance and cannot parse the source of the measured resistance not just fastener stretch.
Cole2534
Diamond
- Joined
- Sep 10, 2010
- Location
- Oklahoma City, OK
Torque wrenches are indeed a compromise, but to dismiss them with some version of a no true scotsman fallacy is... short sighted.
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johansen
Stainless
- Joined
- Aug 16, 2014
- Location
- silverdale wa
I had to shorten one of my headstock bolts to get it in there because i glued the headstock to the bed first.
Was the softest "steel" ive ever cut through. Grade 3 torque specs might be enough to yield?
Was the softest "steel" ive ever cut through. Grade 3 torque specs might be enough to yield?
In the early days of machinery, no one knew what a torque wrench was. In fact they didn't have standard fasteners. It was all custom-made for that application, basically made out of wrought-iron. Torque wrenches are a recent invention, And May for modern high tensile strength fasteners.
I have been a mechanic all my working life. And yes I do own torque wrenches, up to 500 foot-pounds. 90% of the work that I do I use What is referred to as the elbow click methods. Basically, you learn how to tighten something by the feel instead of using a torque wrench. In some cases not near as accurate. But in most cases it's good enough. As long as it doesn't come loose, or damage the threads, your good.
Stay safe and have fun.
Joe.
I have been a mechanic all my working life. And yes I do own torque wrenches, up to 500 foot-pounds. 90% of the work that I do I use What is referred to as the elbow click methods. Basically, you learn how to tighten something by the feel instead of using a torque wrench. In some cases not near as accurate. But in most cases it's good enough. As long as it doesn't come loose, or damage the threads, your good.
Stay safe and have fun.
Joe.
m-lud
Stainless
- Joined
- Sep 4, 2016
After you have twisted bolts for a while you will be within a couple pounds of thr recommended tourqe. Like you know when you are about to brake one off. Bolt size tourqe comes naturally.
I do check crankshaft bolts with a tourqe wrench after tightening and usually get a little movement and the wrench clicks. Not bragging. It just comes natural after a few hundred thousand bolts.
I do check crankshaft bolts with a tourqe wrench after tightening and usually get a little movement and the wrench clicks. Not bragging. It just comes natural after a few hundred thousand bolts.
