I'm building a woodworking drum sander (ShopNotes Vol 15, Issue 86)
which calls for a 24" long 3/4" steel rod for the drum arbor. The rod
needs drilling and a flat for the pulley set screw. I looked at zinc
coated steel rod (about $6 per 3' ) and water quenched drill rod (about
$27 per 3' len) at OSH. There will not be significant weight applied,
just torsion stress from sanding across 16 inches surface. I suspect
the drill rod is overkill for this but would like to hear from you
experts. Also, will I have a much harder time cutting, drilling, and
grinding the drill rod? Would smaller diameter drill rod do the same
job as 3/4" mild steel? Thx.

wrote:
I'm building a woodworking drum sander (ShopNotes Vol 15, Issue 86)
which calls for a 24" long 3/4" steel rod for the drum arbor. The rod
needs drilling and a flat for the pulley set screw. I looked at zinc
coated steel rod (about $6 per 3' ) and water quenched drill rod
(about $27 per 3' len) at OSH. There will not be significant weight
applied, just torsion stress from sanding across 16 inches surface. I
suspect the drill rod is overkill for this but would like to hear
from you experts. Also, will I have a much harder time cutting,
drilling, and grinding the drill rod? Would smaller diameter drill
rod do the same job as 3/4" mild steel? Thx.


Drill rod would be overkill and unecessarily expensive.
Cold rolled steel would be the material of choice here.

Ken.

--
Volunteer your idle computer time for cancer research
http//www.grid.org/download/gold/download.htm
Return address courtesy of Spammotel http://www.spammotel.com/

Drill rod would be overkill and unecessarily expensive.
Cold rolled steel would be the material of choice here.

Ken.

Ken: I think you may have missed an important feature of the drill rod.
Cold rolled and plated steel has a pretty broad diameter tolerance and
may be very difficult to fit into bearings. The drill rod will be
tighter tolerance but probably .001-.002 oversize. What this fellow
needs is a short piece of C1065 TPG (turned, polished & ground)
available from many metal supply houses. Very stuff, very straight and
right on the correct diameter. Leigh @ MarMachine

The stiffness is about the same for the drill rod and any other steel.
Since the stiffness varies by the cube of the diameter ( IIRC ), don't
use smaller diameter rod of any sort.


Dan

wrote:
Would smaller diameter drill rod do the same
job as 3/4" mild steel? Thx.

Get a ground one http://www.cencogrinding.com/drillblanks.html They can and do it.

Martin

Martin Eastburn
@ home at Lions' Lair with our computer lionslair at consolidated dot net
NRA LOH & Endowment Member
NRA Second Amendment Task Force Charter Founder
IHMSA and NRA Metallic Silhouette maker & member


wrote:


Drill rod would be overkill and unecessarily expensive.
Cold rolled steel would be the material of choice here.

Ken.


Ken: I think you may have missed an important feature of the drill rod.
Cold rolled and plated steel has a pretty broad diameter tolerance and
may be very difficult to fit into bearings. The drill rod will be
tighter tolerance but probably .001-.002 oversize. What this fellow
needs is a short piece of C1065 TPG (turned, polished & ground)
available from many metal supply houses. Very stuff, very straight and
right on the correct diameter. Leigh @ MarMachine


----== Posted via Newsfeeds.Com - Unlimited-Unrestricted-Secure Usenet News==----
http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+ Newsgroups
----= East and West-Coast Server Farms - Total Privacy via Encryption =----

On 22 Apr 2006 16:28:46 -0700, wrote:





Drill rod would be overkill and unecessarily expensive.
Cold rolled steel would be the material of choice here.

Ken.

Ken: I think you may have missed an important feature of the drill rod.
Cold rolled and plated steel has a pretty broad diameter tolerance and
may be very difficult to fit into bearings. The drill rod will be
tighter tolerance but probably .001-.002 oversize. What this fellow
needs is a short piece of C1065 TPG (turned, polished & ground)
available from many metal supply houses. Very stuff, very straight and
right on the correct diameter. Leigh @ MarMachine

Listen to Leigh..he really really knows his ****.

Gunner

"I think this is because of your belief in biological Marxism.
As a genetic communist you feel that noticing behavioural
patterns relating to race would cause a conflict with your belief
in biological Marxism." Big Pete, famous Usenet Racist

Gunner wrote:
On 22 Apr 2006 16:28:46 -0700, wrote:





Drill rod would be overkill and unecessarily expensive.
Cold rolled steel would be the material of choice here.

Ken.

Ken: I think you may have missed an important feature of the drill
rod. Cold rolled and plated steel has a pretty broad diameter
tolerance and may be very difficult to fit into bearings. The drill
rod will be tighter tolerance but probably .001-.002 oversize. What
this fellow needs is a short piece of C1065 TPG (turned, polished &
ground) available from many metal supply houses. Very stuff, very
straight and right on the correct diameter. Leigh @ MarMachine

Listen to Leigh..he really really knows his ****.

Gunner

He sure does.
I tend to be cheap and cold rolled has been good to me even onto fitting
bearings - but ,to be sure, precision shafting would be the best choice.

Ken.
--
Volunteer your idle computer time for cancer research
http//www.grid.org/download/gold/download.htm
Return address courtesy of Spammotel http://www.spammotel.com/