Threaded rods vs headed bolts difference
Threaded rods vs headed bolts difference
(OP)
I recently encountered a girth gear in an old ball mill with fasteners (to hold the sections of the girth gear) with threaded rods and nuts on both sides. I do not believe this to be the original design. And it got me thinking about the difference of fastening the gear sections with a threaded rod vs a headed bolt.
I did a bit of research but other than the rod having a lesser tensile strength (with the same diameter), it does not seem to be a difference.
I believe is easier for the rod to get loosen with a rod with nuts on both sides.
What do you think?
I did a bit of research but other than the rod having a lesser tensile strength (with the same diameter), it does not seem to be a difference.
I believe is easier for the rod to get loosen with a rod with nuts on both sides.
What do you think?
JM





RE: Threaded rods vs headed bolts difference
John R. Baker, P.E. (ret)
EX-Product 'Evangelist'
Irvine, CA
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The secret of life is not finding someone to live with
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RE: Threaded rods vs headed bolts difference
Was this designed for a smooth shank to help carry load or hold alignment?
Often threaded rod is crap for tolerances and strength.
The original design may be studs with threads on both ends, it would pay to find out.
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P.E. Metallurgy, Plymouth Tube
RE: Threaded rods vs headed bolts difference
and that the joint (ie the pieces being held by this) couldn't be clamped up, but could be controlled to a precise (ish) gap.
another day in paradise, or is paradise one day closer ?
RE: Threaded rods vs headed bolts difference
thread725-355979: Studs vs. Bolts
RE: Threaded rods vs headed bolts difference
Dik
RE: Threaded rods vs headed bolts difference
Cheers
Greg Locock
New here? Try reading these, they might help FAQ731-376: Eng-Tips.com Forum Policies http://eng-tips.com/market.cfm?
RE: Threaded rods vs headed bolts difference
https://www.youtube.com/watch?v=dpt6RRiUccM
John R. Baker, P.E. (ret)
EX-Product 'Evangelist'
Irvine, CA
Siemens PLM:
UG/NX Museum:
The secret of life is not finding someone to live with
It's finding someone you can't live without
RE: Threaded rods vs headed bolts difference
Cheers
Greg Locock
New here? Try reading these, they might help FAQ731-376: Eng-Tips.com Forum Policies http://eng-tips.com/market.cfm?
RE: Threaded rods vs headed bolts difference
Sometimes these type of gears have 2 bolts for tightening (on each side, 4 total) and 2 to be used as guides (4 total), with a smaller diameter. In this case is an old mill, so who knows originally what was the case. But the 4 rods (on each side, 8 total) are the same diameter.
JM
RE: Threaded rods vs headed bolts difference
another day in paradise, or is paradise one day closer ?
RE: Threaded rods vs headed bolts difference
JM
RE: Threaded rods vs headed bolts difference
For regular strength, I usually us 18x dia and for high strength 24x dia.
Dik