Looking for 7" dia thick wall steel tube for bearing housing

Overland · Friday at 8:32 AM

I've been asked to make some bearing hubs 6.75" OD, 4.50" bore, 6" long. (finished dims, 4 of them).
Solid bar easy to find; anybody know if there is a hollow bar available, and where, please ?
Thanks
Bob

hvnlymachining · Friday at 8:39 AM

Team tube has it in HFS according to their website.

(HFS= Hot Finished Seamless)

Garwood · Friday at 8:52 AM

Usually significantly cheaper to use solid bar.

EmanuelGoldstein · Friday at 9:01 AM

Garwood said:
Usually significantly cheaper to use solid bar.

For two whole feet ? You ain't kiddin.

Plus tubing is frequently really nasty to work with.

michiganbuck · Friday at 9:20 AM

You might find something in Oil well pipe. (comes in SS and other steel.)
://www.wellscreenpipe.com/sale-12507451-od-325mm-6-inch-well-casing-tube-high-performance-water-well-casing-pipe.html

Would/mighty be a sideline for a Roustabout/Roughneck to sell drops.

Overland · Friday at 10:19 AM

Thanks Hvn and others.
Solid 7" bar from local guys $600 - $700.
Team tube $720 delivered from CA.
My customer pointed me to Industrialtube.com, Cincinnati, $379 for 4 pieces, 6.75 OD, 1.25" wall, 5.5" long, delivered. (A519-1026).
That's a huge deal !
Hope you guys can give them some business.
Bob

Garwood · Friday at 11:11 AM

Those prices are insane. You need better suppliers!

Overland · Friday at 11:37 AM

Garwood said:
Those prices are insane. You need better suppliers!

You think I can get a piece of 7" dia solid bar, 24" long delivered for less than $379 ?
Tell me where from, please ? (you said earlier solid cheaper than tube).

Milland · Friday at 11:42 AM

Whatever you use, if these need to be precise you may want to add the cost/time for stress relief after roughing. If just crude stuff for taper rollers, probably not needed.

Garwood · Friday at 11:54 AM

Overland said:
You think I can get a piece of 7" dia solid bar, 24" long delivered for less than $379 ?
Tell me where from, please ? (you said earlier solid cheaper than tube).

7" x 24" 1018 is about $250 picked up from my local supplier. 1045 would be a tiny bit more.

For four parts if you aren't setup to drill that material out you will do fine with the tubing and save some aggravation. Just keep in mind that tubing will be gummy and crummy to work with. Run it 10,000 SFM on the finish passes and it'll be fine.

hanermo · Friday at 12:18 PM

What ?
6" long, 175 mm D ...
It´s 6 inches long per Original post, or 6 feet, ??

Solids should cost about 60-100$ each, 6" long.
For bearing pockets, large bearings, aka major machinery, I would much prefer solids.
I would much prefer "better" grades of steel.

The customer will be much happier with better steel made from homogenous billets. Imo.
At maybe 500$ each piece incremental delivered cost.
Aka it´s 500$ more expensive done this way, you charge 500$ more per piece.
For an assy roller probably worth 100k each, 300k$ delivered, with 4M$ plus ancillary value.

I think it´s madness to try and save 50$ in material on an assy costing 100k$ to make, with 4M$ worth of product, and many multiples of worth.
Explaining this to the customer is Your job.

hvnlymachining · Friday at 12:59 PM

I see a lot of " should cost" written in here, please provide such a suppliers name if it's true, they're going to get very busy real soon!

It helps everyone here if you can post a current or " my last piece cost" price instead of a should be price. Everyone knows it "should be" much cheaper too, but that's useless here.

snowman · Friday at 1:04 PM

Call Duffey

Edward W. Duffy & Co. | Mechanical Tubing & Pipe

A distributor of mechanical tubing and pipe serving Metro Detroit in southeast Michigan. Offers carbon steel, aluminum, stainless, and alloy tubing in a range of sizes at competitive pricing.

www.edwardwduffy.com

Overland · Friday at 1:45 PM

snowman said:
Call Duffey

Edward W. Duffy & Co. | Mechanical Tubing & Pipe

A distributor of mechanical tubing and pipe serving Metro Detroit in southeast Michigan. Offers carbon steel, aluminum, stainless, and alloy tubing in a range of sizes at competitive pricing.

www.edwardwduffy.com

Thanks !

Garwood · Friday at 1:46 PM

hvnlymachining said:
I see a lot of " should cost" written in here, please provide such a suppliers name if it's true, they're going to get very busy real soon!

It helps everyone here if you can post a current or " my last piece cost" price instead of a should be price. Everyone knows it "should be" much cheaper too, but that's useless here.

I buy 1" to 14" rounds continually. 1018, 1045, 8620 and 4140 as I'd imagine most other shops do as well. You don't know off the top of your head what this stuff costs per pound this week from your favorite local supplier? I would think most small machine shops would have the material on the shelf to make the OP's parts. I have most sizes in most materials to 10". I have atleast a few feet of 7" 1045.

Pacific Machinery and Toolsteel

Sunbelt-Turret

Overland · Friday at 4:10 PM

Duffy quoted $139 ea, + $30 ea UPS shipping, total $680.
Makes Industrial tube look even better.
Thanks to all.
Bob

Peter S · Saturday at 6:08 AM

We use hollow bar a lot, it is very nice to machine. Surely any steel supplier would offer it?

For example, for Overland's job, 180 x 105mm hollow bar would be perfect. About 10mm to remove from both OD and ID. Machines like a dream.

Pages from a supplier at the bottom of the world:

Overland · Saturday at 7:43 AM

The grade I've got from Industrial Tube is 1026.
Seems to be easily machined grade.
10,000 sfm on a 6" dia part is 6,000 rpm. My 1972 21x80 Colchester can't quite get there.....
But thanks,
Bob

Finegrain · Saturday at 8:02 AM

Garwood said:
Run it 10,000 SFM on the finish passes and it'll be fine.

Seriously?

kb0thn · Saturday at 8:18 AM

I've been buying material for (short) production runs of some things that could come from solid or tube. Historically it has been cheaper and/or easier to source for me to make from solids. Price per pound on weird tubes being 2x or 3x the price per pound for solid. And with carbide insert drills able to punch nice size hole in solid quickly, it is just another operation in the CNC lathe and probably a bit more time boring.

Recently it appears that tube and solid stainless are similar in price. I just switched a part over to tube. We'll see how much I hate myself when I see how out-of-round the tube is.

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