Machining Metal - Pirate4x4.Com : 4x4 and Off-Road Forum

aloharover · 02-02-2010, 07:51 PM

OK, I need to make a part out of 1.75" diameter steel.

going to be turning on the lath. need to center drill a 7/16 hole, bore a recess for the bolt head, then drill and tap some 10-32 holes around this center.

I will need to weld a piece of steel onto this after.
it doesn't need to be hardened or anything like that. just machineable. Will bead blast, park when done.

does it matter if I use 8620, 4130, 1018, or...

Aron82 · 02-02-2010, 08:13 PM

i would just use mild steel. Stay away from anything high carbon and let it cool slowly after welding it.

maxyedor · 02-02-2010, 08:29 PM

Only reason to use something besides 1018 is that you need a particular property that it lacks, hardness, flexibility, etc.

If you can, pre-heat the machined part to 500ish before welding, it will give you better penetration and be less prone to cracking. That is, unless both pars are extremely thick and you're just going to turn the welder up to 11 and blast away. Either way let it cool slowly, burring it in dray sand works great.

Gozuki · 02-02-2010, 08:43 PM

8620 is typically a gear type steel. Higher carbon and heat treatable. Way overkill. The 4130 would no be a good choice due to the welding portion. 1018 will be fine, only real downfall is difficulty obtaining a good finish, and hitting a dimension.

aloharover · 02-03-2010, 09:08 AM

thanks.
Dims are not crittical. Hell +/- .05 will be more then good enough.
Bead blast finish and then end up getting duracoated.

Thanks

Toyoda · 02-03-2010, 09:56 AM

no 6011 root with 7018 over it?

aloharover · 02-03-2010, 10:22 AM

This is it. Pretty simple.
This is the side view.

1.75 dia steel.
2.5" long
Bore completely through 7/16". This is for a 1" long 7/16 course thread bolt
Do approx a 3/4" dia recessed bored. Basically just large enough so a socket can fit over the bolt.
Outside dia on the left hand side is reduced to about 1.6"
After all the turning is done, the two red lines represent cuts. basically angle the back face, and then the bottom.
Blue piece is 3/8" thick and welded to the bottom.
The piece on the back is .25" disc (actually an oval) and retained to the machined round with a number of 10-32s.
It is also drilled and tapped for four 10-32s, in a square, for an item that will be attached to this.

Anyone able to guess what this is?

87manche · 02-03-2010, 02:28 PM

a nifty contraption to bolt an AR-15 lower to your workbench?

aloharover · 02-03-2010, 02:48 PM

nope

4runner · 02-03-2010, 03:01 PM

some sort of swivel head mount?

NEWMANS OWN · 02-03-2010, 03:08 PM

SOme sort of stock adapter. No idea of application

Citzen_Hawk · 02-03-2010, 03:21 PM

remember its round...

so guessing sterling/greese gun stock adapter

aloharover · 02-03-2010, 03:22 PM

Quote:

Originally Posted by NEWMANS OWN

SOme sort of stock adapter. No idea of application

on the right path

aloharover · 02-03-2010, 03:22 PM

Quote:

Originally Posted by Citzen_Hawk

remember its round...

so guessing sterling/greese gun stock adapter

nope

aloharover · 02-03-2010, 04:17 PM

Enfield, viewed from the other side. But hopefully the mind can picture it.

The blue part that gets welded on, for an AR/AK grip.
Will use an ACE folder for the actual stock

4runner · 02-04-2010, 06:53 PM

hope it folds LEFT to stay away from teh bolt handle...

aloharover · 02-05-2010, 02:59 PM

Yes. ACE folding mech can be installed left or right.

02-02-2010, 07:51 PM	#1 (permalink)
aloharover lets go Squatchen Join Date: Oct 2002 Member # 14561 Posts: 15,861	Machining Metal OK, I need to make a part out of 1.75" diameter steel. going to be turning on the lath. need to center drill a 7/16 hole, bore a recess for the bolt head, then drill and tap some 10-32 holes around this center. I will need to weld a piece of steel onto this after. it doesn't need to be hardened or anything like that. just machineable. Will bead blast, park when done. does it matter if I use 8620, 4130, 1018, or... __________________ Want to know how I lost 25lbs in 9 weeks? Try INSANITY®. www.beachbodycoach.com/petermhope I love it when a plan comes together Colorado Springs, CO Based FFL-07/SOT

02-03-2010, 09:08 AM	#5 (permalink)
aloharover lets go Squatchen Join Date: Oct 2002 Member # 14561 Posts: 15,861	thanks. Dims are not crittical. Hell +/- .05 will be more then good enough. Bead blast finish and then end up getting duracoated. Thanks __________________ Want to know how I lost 25lbs in 9 weeks? Try INSANITY®. www.beachbodycoach.com/petermhope I love it when a plan comes together Colorado Springs, CO Based FFL-07/SOT

02-03-2010, 10:22 AM	#7 (permalink)
aloharover lets go Squatchen Join Date: Oct 2002 Member # 14561 Posts: 15,861	This is it. Pretty simple. This is the side view. 1.75 dia steel. 2.5" long Bore completely through 7/16". This is for a 1" long 7/16 course thread bolt Do approx a 3/4" dia recessed bored. Basically just large enough so a socket can fit over the bolt. Outside dia on the left hand side is reduced to about 1.6" After all the turning is done, the two red lines represent cuts. basically angle the back face, and then the bottom. Blue piece is 3/8" thick and welded to the bottom. The piece on the back is .25" disc (actually an oval) and retained to the machined round with a number of 10-32s. It is also drilled and tapped for four 10-32s, in a square, for an item that will be attached to this. Anyone able to guess what this is? Attached Images __________________ Want to know how I lost 25lbs in 9 weeks? Try INSANITY®. www.beachbodycoach.com/petermhope I love it when a plan comes together Colorado Springs, CO Based FFL-07/SOT

02-03-2010, 02:48 PM	#9 (permalink)
aloharover lets go Squatchen Join Date: Oct 2002 Member # 14561 Posts: 15,861	nope __________________ Want to know how I lost 25lbs in 9 weeks? Try INSANITY®. www.beachbodycoach.com/petermhope I love it when a plan comes together Colorado Springs, CO Based FFL-07/SOT

02-03-2010, 03:01 PM	#10 (permalink)
4runner please fix my runner Join Date: May 2000 Member # 946 Location: WTF TX USA Posts: 6,560	some sort of swivel head mount? __________________ 4.3runner ---A golf course is a pointless exploitation of a perfectly good rifle range--- buy my ultra rare Omega III presentation rifle special price $42500.00

02-02-2010, 08:13 PM	#2 (permalink)
Aron82 Registered User Join Date: Jan 2001 Member # 3000 Location: Seeley Lake, Montana, United States Posts: 441	i would just use mild steel. Stay away from anything high carbon and let it cool slowly after welding it.

02-02-2010, 08:29 PM	#3 (permalink)
maxyedor Registered User Join Date: Feb 2007 Member # 87150 Location: 1000 Oaks Posts: 2,440	Only reason to use something besides 1018 is that you need a particular property that it lacks, hardness, flexibility, etc. If you can, pre-heat the machined part to 500ish before welding, it will give you better penetration and be less prone to cracking. That is, unless both pars are extremely thick and you're just going to turn the welder up to 11 and blast away. Either way let it cool slowly, burring it in dray sand works great.

02-03-2010, 09:56 AM	#6 (permalink)
Toyoda Rock God Join Date: Sep 2002 Member # 13707 Location: California Posts: 1,922	no 6011 root with 7018 over it?

02-03-2010, 02:28 PM	#8 (permalink)
87manche Registered User Join Date: Feb 2007 Member # 86724 Posts: 4,647	a nifty contraption to bolt an AR-15 lower to your workbench?

02-03-2010, 03:08 PM	#11 (permalink)
NEWMANS OWN Rock God Join Date: Nov 2003 Member # 24650 Posts: 1,168	SOme sort of stock adapter. No idea of application

02-03-2010, 03:21 PM	#12 (permalink)
Citzen_Hawk Registered User Join Date: Mar 2009 Member # 132925 Location: North of Dallas Posts: 810	remember its round... so guessing sterling/greese gun stock adapter

02-03-2010, 04:17 PM	#15 (permalink)
aloharover lets go Squatchen Join Date: Oct 2002 Member # 14561 Posts: 15,861	Enfield, viewed from the other side. But hopefully the mind can picture it. The blue part that gets welded on, for an AR/AK grip. Will use an ACE folder for the actual stock Attached Images __________________ Want to know how I lost 25lbs in 9 weeks? Try INSANITY®. www.beachbodycoach.com/petermhope I love it when a plan comes together Colorado Springs, CO Based FFL-07/SOT

02-04-2010, 06:53 PM	#16 (permalink)
4runner please fix my runner Join Date: May 2000 Member # 946 Location: WTF TX USA Posts: 6,560	hope it folds LEFT to stay away from teh bolt handle... __________________ 4.3runner ---A golf course is a pointless exploitation of a perfectly good rifle range--- buy my ultra rare Omega III presentation rifle special price $42500.00

02-05-2010, 02:59 PM	#17 (permalink)
aloharover lets go Squatchen Join Date: Oct 2002 Member # 14561 Posts: 15,861	Yes. ACE folding mech can be installed left or right. __________________ Want to know how I lost 25lbs in 9 weeks? Try INSANITY®. www.beachbodycoach.com/petermhope I love it when a plan comes together Colorado Springs, CO Based FFL-07/SOT

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