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MACHINING GENERAL

Anonymous Tue 20 Oct 2015 12:30:50 No.890891 View Reply Report Delete

Quoted By: >>890923 >>891034 >>891048 >>891631 >>893829

SO, I happen to have a JET J-720R.
>http://www.jettools.com/us/en/p/j-720r-3-arm-radial-drill-press-230-460v/320033

I'm an idiot though so I have no idea what sort of vice will fit the damn thing.
it sits very sexily and glares at me for using 2"X4"s and clamps in lieu of a proper vice.
what reasonably priced vice can I get for it?

also
MACHINING GENERAL, WHAT ARE YOU GUYS MAKING?
>LET THE CHIPS FLY!

Anonymous

Anonymous Tue 20 Oct 2015 13:21:20 No.890907 Report Delete

Quoted By: >>890932

currently using this at school

http://en.dmgmori.com/products/milling-machines/universal-milling-machines/dmu/dmu-50

id's breddy cool, although the heidenhein control makes me rage sometimes

Anonymous

View Same Google ImgOps iqdb SauceNAO pol.jpg, 11KiB, 720x406

Anonymous Tue 20 Oct 2015 13:50:46 No.890919 Report Delete

Quoted By:

http://www.use-enco.com/CGI/INSRIT?PARTPG=INLMKD&PMPXNO=3463215&PMAKA=890-8817

Anonymous

Anonymous Tue 20 Oct 2015 14:01:56 No.890923 Report Delete

Quoted By: >>890925 >>890928 >>890936

>>890891
You can use any sort of machinist vise. I'd get a 6-inch angle-lock Kurt style. Also you could just use a hold-down kit.
That thing isn't really for machining though.

Anonymous

Anonymous Tue 20 Oct 2015 14:06:40 No.890925 Report Delete

Quoted By: >>890936

>>890923
so there's no weird table specifications that I need to worry about?(yeah, told you I was an idiot...)

great...

Anonymous

Anonymous Tue 20 Oct 2015 14:11:25 No.890928 Report Delete

Quoted By: >>890942 >>890948

>>890923
>Kurt style.
http://www.kurtworkholding.com/manual-vise-opening-p-1205-l-en.html
$600 for a vice?
is this a normal price?

Anonymous

Anonymous Tue 20 Oct 2015 14:21:41 No.890932 Report Delete

Quoted By: >>890938

>>890907
confirmed german or dutch

Anonymous

Anonymous Tue 20 Oct 2015 14:29:48 No.890936 Report Delete

Quoted By:

>>890923
Drilling is machining.

>>890925
Just get T-slot nuts and bolts that fit the T-slot and it's all good. Vises themselves are universal assuming it fits on the table.

Anonymous

Anonymous Tue 20 Oct 2015 14:36:14 No.890938 Report Delete

Quoted By: >>890948

>>890932

confirmed failure, finnish actually

Anonymous

Anonymous Tue 20 Oct 2015 14:44:23 No.890942 Report Delete

Quoted By:

>>890928
$600 is normal for a 6" Kurt vise.
There is other ones that are decent for around $400 for a 6" vise. Enco has a TECO for that much.
Kurt isn't the absolute best either--but significantly better ones cost a lot more.

The cheaper ones tend to lift, due to poor casting and finishing.
Sometimes you can cure the poor casting issue (the surfaces of the hold-down wedge) but they still lack stiffness in the vise base. And they aren't milled as flat/straight as the good brands either.

If that matters or not, is up to you.
If you regularly work in sub-.001" precision, then it will probably matter. (generally you don't do that on any drill press...)
If you don't, get a bigger cheap one and don't tighten it real hard. (...I am not a professional machinist, but online I've seen people with some seriously-tired mills who went and dropped $600 for a Kurt, thinking it would do something magical...)

Anonymous

Anonymous Tue 20 Oct 2015 14:49:19 No.890948 Report Delete

Quoted By: >>890957

>>890928
thats a price for a milling vice, still rather cheap. The hydraulic vices go for 2k+
these clamp with a high repeateability.
depending on what you want to drill, get a vice accordingly
https://www.machinemart.co.uk/shop/search/filter/drill-press-vices/type/any/module/shopcategory/page/1

>>890938
fugg, my old school in holland had a deckel with heidenhain aswell. i found workshop programming kinda tricky at start, but its really easy and fun after a while. also good choice on your study, machinist life best life

Anonymous

Anonymous Tue 20 Oct 2015 15:24:16 No.890957 Report Delete

Quoted By:

>>890948

yeah programming with heidenhain is really simple and fast once you get hang of it, but the thing that makes me rage sometimes is that the control has been translated quite poorly to finnish, propably by someone who doesn't know anything about machining related stuff

Anonymous

Anonymous Tue 20 Oct 2015 18:26:58 No.891034 Report Delete

Quoted By: >>891263

>>890891
What type of work do you plan on using it for? Work size? Work shape? Accuracy wanting to be achieved. That would help on any advice on what kind of work holding solutions you may want to look into.

But to answer your question any vice made for a bench press or milling machine will work. You just have to figure out how to do it. I would suggest to look for vises that can accept at least 5/8 diameter bolt because your table has 3/4 t-nut slots. And I think 3/4 t-nuts come standard in 5/8-11. I usually make my own as needed and use whatever specs suit my needs.

>>890891
>it sits very sexily and glares at me for using 2"X4"s and clamps in lieu of a proper vice

I'm guessing these camps are C-clamps? A good toe clamping set may suit all your needs. Also you will need one with 3/4 t-nuts

Anonymous

View Same Google ImgOps iqdb SauceNAO clamp kit.jpg, 169KiB, 1200x1200

Anonymous Tue 20 Oct 2015 18:46:02 No.891048 Report Delete

Quoted By:

>>890891
http://www.use-enco.com/CGI/INSRIT?PMAKA=425-7261&PMPXNO=952374&PARTPG=INLMK32

and a clamp kit

Anonymous

View Same Google ImgOps iqdb SauceNAO 20151020_155022.jpg, 1MiB, 3264x1836

Anonymous Wed 21 Oct 2015 00:43:00 No.891166 Report Delete

Quoted By: >>891263 >>891739

just breaking shit

Anonymous

View Same Google ImgOps iqdb SauceNAO 19572-american-wooden-clamps-1.jpg, 8KiB, 300x216

Anonymous Wed 21 Oct 2015 09:26:25 No.891263 Report Delete

Quoted By: >>891272 >>891433

>>891034
>What type of work do you plan on using it for?
drilling holes in things and enlarging holes in other things.

>Work size?
2"X4"X8' steel bars/tubing

>Accuracy wanting to be achieved.
not very much, a dozen thousandths either way is technically acceptable.

>your table has 3/4 t-nut slots
THANK YOU
finally a lead on the information I was actually looking for. like I said, I know basically nothing of machining except the people capable of it are predominantly awesome.

it's going in a shop where we'll have to mount and dismount the vice on a regular basis to stop the welders from drilling straight through work-pieces and into the vice/table are t-nuts easy to change/remove?

>I'm guessing these camps are C-clamps?
nope
adjustable length screw-clamps
>pic related

>>891166
what were you cutting?

Anonymous

View Same Google ImgOps iqdb SauceNAO work holding.jpg, 82KiB, 800x600

Anonymous Wed 21 Oct 2015 10:11:14 No.891272 Report Delete

Quoted By: >>892092

>>891263
>are t-nuts easy to change/remove?
yes, they simply slide into the tee-slots in the table, the tee nuts move freely in the slots.

then you use a clamping kit to clamp materiel to the table.

Anonymous

View Same Google ImgOps iqdb SauceNAO e1e610f1368b3edcc9318230cdb07b4d.jpg, 32KiB, 600x315

Anonymous Wed 21 Oct 2015 14:38:38 No.891369 Report Delete

Quoted By: >>891480 >>891631 >>893963

Recently seen the Jet brand, kinda intrested about their lathes,anyone got some experience working them?
I do like their colour palette, but function over asthetics anyday

Anonymous

Anonymous Wed 21 Oct 2015 16:33:43 No.891433 Report Delete

Quoted By:

>>891263
>what were you cutting?
Heat treated 95510 bronze.

Anonymous

Anonymous Wed 21 Oct 2015 18:49:38 No.891480 Report Delete

Quoted By:

>>891369
ive used a couple smaller jet lathes in shops that i worked in. one was old green, about 16" swing. and the other was a newer white one about 12". i have no complaints about either. they were accurate enough for the job shops i was working in. nothing fancy or special. also i own a small jet mill, the power switch broke on that after 8 years, took ages to get a replacement. had it rigged with 2 hd wall switches in the mean time. no other problems.

Anonymous

Anonymous Thu 22 Oct 2015 02:44:47 No.891631 Report Delete

Quoted By: >>891722 >>891737

>>890891
so tell us,,,, how the fuck did you end up owning a monstrous $12K drill press?

>>891369
>Recently seen the Jet brand, kinda intrested about their lathes,anyone got some experience working them?
Jet is said by many to be the best of the Taiwan brands for small/medium manual machinery. If you compare a Jet item with a similar size machine from Grizzly or anywhere else, the Jet will cost more but is finished nicer and may have a few more features.

If you are concerned about parts breaking, among the cheaper import machines Grizzly is said to have the best support.

Anonymous

Anonymous Thu 22 Oct 2015 04:32:23 No.891649 Report Delete

Quoted By: >>891722

Exactly the thread I was searching for.

JET lathes are shit, compared to other heavy metal brands. I have one that is ~5 years old, I completely rebuilt and restored it, and let me tell you, the build quality is questionable. Tonight the gearbox jammed up too, and god knows I'll have to take it apart to find out why. 3/10, wouldn't buy again, but if you can get one used and working and for a low price, good place to start.

If you want a MINI lathe, I myself am looking at Sherline. Recommended by both hobbyists and a professional (my boss, been in the game for a fair while) You can get a look at it in the videos on the youtube page Clickspring, if you're okay watching all that footage for the few small shots it appears in....

OP, anything that holds the work down without it moving is good enough. If its not good enough, cut slower. If you want your part to not move much (another anon called it repeatability) when you clamp, figure out how to use a dial indicator to properly index your part. since you index after you clamp, movement caused by claiming method is irrelevant.

Anonymous

Anonymous Thu 22 Oct 2015 09:23:58 No.891722 Report Delete

Quoted By: >>891737

>>891631
>so tell us,,,, how the fuck did you end up owning a monstrous $12K drill press?
craigslist...also I think you added a zero...

>>891649
>If you want a MINI lathe,
as in a desk-top one? yes, I would like one of those.

>OP, anything that holds the work down without it moving is good enough.
yes, but nothing really does. at least, nothing that isn't immediately destroyed by a welder.

Anonymous

View Same Google ImgOps iqdb SauceNAO bigdrillz_njknjkjnknj.jpg, 178KiB, 984x964

Anonymous Thu 22 Oct 2015 10:18:18 No.891737 Report Delete

Quoted By: >>891741

>>891722
>>>891631 (You)
>>so tell us,,,, how the fuck did you end up owning a monstrous $12K drill press?
>craigslist...also I think you added a zero...
I clicked the (#2) Amazon link on the 'online retailers' page and it showed that a new one costs $12K

and now I clicked the first link (Southern Tool) and they list it for $12K also. So for a new one, it would cost a lot of money.

Even used--even most machinist guys would tell you that radial drills are not exactly normal home-level equipment...
Some people unfamiliar may not get the size scale from OP's picture----but this model is 7 feet tall, rated for drilling holes up to 1.5" in mild steel, and it weighs 2700 lbs

pic related: here is some stubby 1.5" drills at MSC, costing between $100 and $200 *each*... most places that make drill bits this big don't even give prices online, because it's industrial-sized stuff and you order them through sales reps that come visit you

Anonymous

Anonymous Thu 22 Oct 2015 10:26:44 No.891739 Report Delete

Quoted By:

>>891166

Are we related?

Anonymous

Anonymous Thu 22 Oct 2015 10:30:57 No.891741 Report Delete

Quoted By:

>>891737
>not exactly normal home-level equipment...
small business shop.

and it really only cost us $1200 plus shipping (Oklahoma to South Texas)

>big drills
part of why I want a vice. I snapped a 1-3/16" bit in half when my work-piece moved.

and the welders just clamp it down real tight with whatever they have at hand and set the auto-feed to MAXIMUM DRILL SPEED when they need to cut a hole and everything works out just fine.

it pisses me off something fierce..

Anonymous

Anonymous Thu 22 Oct 2015 11:39:33 No.891755 Report Delete

Quoted By: >>891757 >>894541 >>895308

Thinking of taking a CNC machinist course at local college should i do it?

Anonymous

Anonymous Thu 22 Oct 2015 11:41:41 No.891757 Report Delete

Quoted By:

>>891755
yes

Anonymous

Anonymous Fri 23 Oct 2015 10:23:07 No.892092 Report Delete

Quoted By:

>>891272
dont know why but this is sexy..

Anonymous

View Same Google ImgOps iqdb SauceNAO Picture or Video 111.jpg, 2MiB, 2448x3264

Anonymous Fri 23 Oct 2015 11:52:21 No.892115 Report Delete

Quoted By: >>892211 >>893369

still clipping along on these 30 year old monsters
>tfw maybe one day the shop will upgrade to something from this decade

Anonymous

Anonymous Fri 23 Oct 2015 15:35:12 No.892211 Report Delete

Quoted By: >>892253

>>892115
buying a machine costs money, using the old one makes money.
although, if i were you i would accidentally crash it. g0 into the chuck at max rpm

Anonymous

Anonymous Fri 23 Oct 2015 17:20:50 No.892253 Report Delete

Quoted By: >>893570

>>892211
It wouldn't be so bad if they held tolerance
>go from 2" OD to 4" OD you'll get sizes jumping .010 in either direction
As far as crashing them, they are lathes from the 50s retrofitted with consoles and slides from the 80s so even when we do crash them they are just fine

Anonymous

Anonymous Mon 26 Oct 2015 07:17:10 No.893369 Report Delete

Quoted By: >>894066

>>892115
Maybe one of the cleanest machine shop floors I have seen. And cleanest lathe I have seen. I looks like you are machining cast or a ductile type of material ( presume this by how the chips look). If so I know it really isn't that clean. Machining ductile is comparable working in a coal mine..... you have a fine layer of dust everywhere.

Anonymous

Anonymous Mon 26 Oct 2015 15:14:10 No.893570 Report Delete

Quoted By:

>>892253
back when they made shit to last.
used USSR made drills from an unsorted box last summer. better than most other drills i've used, they dug into it like i was drilling chocolate.

Anonymous

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Anonymous Tue 27 Oct 2015 00:33:16 No.893829 Report Delete

Quoted By: >>894109 >>894539

>>890891
Is thing worth $1200? I see it having a very high potential for being useful, but I kind of want an opinion from a community of people who are more familiar with this than myself.

Anonymous

Anonymous Tue 27 Oct 2015 08:19:18 No.893963 Report Delete

Quoted By:

>>891369

That looks like it might be identical to the old colchester lathe I use at work. The control layout and everything look identical.

If it is, and it;s been made to a decent quality, it's a very good lathe.

Anonymous

Anonymous Tue 27 Oct 2015 12:50:12 No.894066 Report Delete

Quoted By:

>>893369
It's preform tungesten carbide.. It's pretty dirty but we try and keep our shit tidy

Anonymous

Anonymous Tue 27 Oct 2015 13:55:42 No.894109 Report Delete

Quoted By: >>894449 >>894543

>>893829
Its worth it if you need $1200 worth of holes drilled more accurately than you could do by hand or is out of reach of a standard drill press.

Protip: Look up annular cutters, they are god's drill bits.

Anonymous

Anonymous Wed 28 Oct 2015 01:27:55 No.894449 Report Delete

Quoted By: >>894539 >>894768 >>895347

>>894109
One thing I did see it being useful for, even though I'm not really into guns all that much is that I could buy the other parts separate use it for grinding/drilling the lower receiver then sell tagless weapons to authorized brokers or shops (who would then tag them for legal reasons) for dirt cheap but still make maintain a small profit margin. I need to do more research but I'm pretty sure by buying parts individually and assembling them myself I end up paying quite a bit less money than if I purchase a fully assembled gun.

Anonymous

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Anonymous Wed 28 Oct 2015 02:10:53 No.894464 Report Delete

Quoted By:

Anonymous

Anonymous Wed 28 Oct 2015 08:18:22 No.894539 Report Delete

Quoted By:

>>893829
>>894449
Sort of related question:

What's the ruling on 80% lowers, are they simply not considered weapon parts or is there a special exception; seems like there could be money to make in making the lowers themselves.

I ask because in bongistan, anything that could be considered part of an ar15 is not going to be easily exportable

Anonymous

Anonymous Wed 28 Oct 2015 08:23:42 No.894541 Report Delete

Quoted By:

>>891755
YES! Take CAD first so you think in CAD. I took CNC first and would have benefited greatly from learning CAD beforehand. Most college machining courses have manual machining integrated with CNC courses for reasons you will see and appreciate.

It is all huge fun.

Anonymous

Anonymous Wed 28 Oct 2015 08:25:44 No.894543 Report Delete

Quoted By:

>>894109
>Protip: Look up annular cutters, they are god's drill bits.

Yes they are, and you can buy or easily modify an existing arbor to run them.

Anonymous

Anonymous Wed 28 Oct 2015 19:12:19 No.894768 Report Delete

Quoted By: >>895348

>>894449
If you create finished receivers you get to comply with ATF laws or go to the graybar hotel. Every yokel and his yokel brother wants to mill "paperweights" into receivers. No margin left except custom work in that game.

Anonymous

Anonymous Thu 29 Oct 2015 19:30:09 No.895308 Report Delete

Quoted By:

>>891755
Take a manual machining course first if you have no experience. You will learn great skills especially in a college level. Then after that you can learn some g-code and get into cnc or continue into more schooling...

My college degree consisted mostly half and half of manual and CNC. The CNC was stricly writing g-code from scratch and to do that to need to know what to tell the machine to do logically. Never got into cad as my first job was as a manual machinist and just fell into it. Bosses bring you problems to solve.... mostly from the cnc dept. you are an asset if you can do it well. If you just want to just learn as a hobby fine, but I have a degree but I learned more in my first 6 months on the job.

You do not want to be a button pusher

Anonymous

Anonymous Thu 29 Oct 2015 20:22:01 No.895347 Report Delete

Quoted By:

>>894449
You can buy a complete ar for $500

Anonymous

Anonymous Thu 29 Oct 2015 20:23:21 No.895348 Report Delete

Quoted By:

>>894768
You can finish receivers for your own use but you cant construct them to sell them.

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