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Best way to cut stock to size

Best way to cut stock to size

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Men Ifr19/12/2016 10:53:47
119 forum posts
10 photos
Say I have some angle iron I want to cut and it's 3 to 4 mm thick by 40mm and 2m long.

I need to cut 200mm off then cut along one side (200mm cut)

I'm getting a bit fed up of doing this with a hacksaw I don't do loads but it's hard going..

I'm wondering if I should invest in a chop saw I can get one from screwfix for £80 or £90? Though that seems to use an abrasive blade.. Or would the money be better spent (and save precious garage space) getting a cutting arbour? But that can't cut the length.

I could mill a slot the whole way through the 200mm length but expect that will be a slow process if I'm using a small cutter and.
Ian Parkin19/12/2016 11:09:44
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1174 forum posts
303 photos

Cheap way is a 4.5 inch angle grinder with a 1mm blade in ...will slice through in no time

The cheap chinese 4x6 bandsaws will also do it easily

Brian G19/12/2016 11:53:46
912 forum posts
40 photos

My son has one of the cheap "Evolution" chop saws from Screwfix (very cheap - 110V in their sale was half price) with a TCT blade that will cut timber as well as metal (although remember to remove any sawdust from the bag before cutting steel). Works OK although the clamping seems to have been designed for partitioning etc. so it doesn't hold smaller materials or round bar that well - making a vice for it is on the "to do" list.

Frances IoM19/12/2016 12:07:31
1395 forum posts
30 photos
put the money towards a small bandsaw eg the cheapie from Chester tools saves hours - however a small angle grinder in a fixed stand (Aldi do a very cheap stand + small grinder at times = no doubt others do as well) use the very thin cut off blades - gets thru upto about 25mm stainless which would gag the bandsaw + cut off saw
Nigel McBurney 119/12/2016 14:18:25
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1101 forum posts
3 photos

Angle grinder,with a 1mm disc, it also has lots of other uses e.g. wire brush,grinding discs,sanding discs etc, apart from cutting the angle iron all the burrs and sharp edges can be removed with a heavy grit sanding disc,or rust removed with a wire wheel, I have half a dozen angle grinders it saves time by not having to change the discs,wire brushes. etcI have a power hacksaw,large industrial bandsaw ,mill etc ,but it is surprising how often I use an angle grinder,buying cheapie saws is not recommended they are really not up to the job.

Russ B19/12/2016 14:27:53
635 forum posts
34 photos

I have a blackgates power hacksaw but a 1mm cutting disk in the angle grinder is my weapon of choice for steel - it will melt through 3-4mm thick angle like butter, gentle pressure only.

The hacksaw is great, fits on my bench top and stowes out of the way, but its a steady job - 10 minutes for your average cut through a solid bar or angle. just about the right amount of time to go and do something else. The longest and biggest cut I've ever done, was a 60mm solid round EN16 shaft (times 10!) each cut was around 50 minutes with gentle pressure (weights on the handle) - I wouldn't image a single 1mm cutting disk would get through that

Circlip19/12/2016 14:37:19
1723 forum posts

Would have thought it would have been more economical on material and effort to buy Flat of 4mm thickness by whatever width.

Regards Ian.

MW19/12/2016 14:39:36
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2052 forum posts
56 photos
Posted by Ian Parkin on 19/12/2016 11:09:44:

The cheap chinese 4x6 bandsaws will also do it easily

Agreed, a slitting saw also does a quick accurate job when you need it that good, but the bandsaw is the chopmaster, it is quite roomy though in the spatial department.

Michael W

not done it yet19/12/2016 15:03:54
7517 forum posts
20 photos

Circlip may be right but it might help if the poster indicated how much needs to be cut off (or left on).

JasonB19/12/2016 16:20:27
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25215 forum posts
3105 photos
1 articles

Hacksaw to length and slitting saw for the long cuts.

Alternative is to buy a Femi 780XL or 782XL bandsaw which will cut to length and the accesory table so you can use it as a vertical bandsaw to make the 200mm long cuts.

Edited By JasonB on 19/12/2016 16:21:15

mechman4819/12/2016 22:50:48
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2947 forum posts
468 photos
Posted by Ian Parkin on 19/12/2016 11:09:44:

Cheap way is a 4.5 inch angle grinder with a 1mm blade in ...will slice through in no time

The cheap chinese 4x6 bandsaws will also do it easily


​... Have one of ea. but my preference would be the angle grinder with 1mm cutting disc, plus many other uses as described.

​George.

Bikepete19/12/2016 23:48:01
250 forum posts
34 photos

"angle grinder with 1mm cutting disc"

Handy indeed but throws nasty gritty sparks everywhere and is noisy. In a small workshop may be less practical. Also, angle grinders (especially with thin blades) are potentially 'scary' if you're not confident and firm of hand and arm. Any sort of saw is a lot quieter, cleaner and more controlled, if slower...

Edited By Bikepete on 19/12/2016 23:49:28

Matthew Reed20/12/2016 07:58:18
41 forum posts

Plus one for an angle grinder and the Aldi stand. The later is really neat, and ridiculously cheap, but could treated as a casting to make something very flash from. Then disks are also cheap enough at the moment.

Slightly alarmed at the thought of anyone using this inside their workshop. Sparks really fly, so it's strictly an outside job in my book.

Men Ifr20/12/2016 08:07:00
119 forum posts
10 photos
Thanks for the replied. I made the long cut with the angle grinder and 1mm disk it took 5min and was not a nice job. I.e. can't see the cutting line for the sparks flying in your facevetc. I did have the shield on and moved to catch as many sparks as possible but plenty still escape. Does the grinder stand stop sparks flying at you?
Carl Wilson 420/12/2016 08:30:01
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670 forum posts
53 photos

Grinder in a little workshop is a recipe for disaster. The sparks embed themselves in things really easily, like the bed of your lathe and the table of your mill. They are maybe ok in a rough as arseholes fabrication shop where that type of thing is of little consequence. Even then, maybe not. Definitely not for a precision tooling environment in my opinion.

I used to have a 12" De Walt "abrasive chop saw"; basically a big grinder on a stand. It used to scare the living shit out of me. I used to use it while wondering what would happen if the disc burst. So I sold it to a guy at a local small fabrication firm and I put the money towards getting a Taiwan I think made horizontal bandsaw. It does a great job, it's quiet and no sparks!

Paul Lousick20/12/2016 08:30:05
2276 forum posts
801 photos

An angle grinder stand only holds the grinder so it is square to the job. Sparks still fly. I use a couple of sheets of plywood to surround the area where I am grinding to restrict the area of flying particles. Still a messy process.

A chop saw or small band saw (unless you can use it in vertical mode) will have problems making long cuts along the length of the angle.

Making long straight cuts by hand takes a bit of skill keeping the grinder on line.  I have clamped a piece of flat bar to the plate being cut as a guide for the grinder wheel. (like you draw a straight line with a pencil and rule).  A light cut along the guide first (not all of the way thru) followed by deeper cuts.

Paul.

Edited By Paul Lousick on 20/12/2016 08:45:00

JasonB20/12/2016 13:10:46
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25215 forum posts
3105 photos
1 articles

You should be able to see your line when grinding, start the cut on the end of the line nearest to you and work along the cut away from you, most sparks will go down through the work this way and behind the remaining line.

Should be able to keep within a Sharpie line like that. Both these cuts were started from the edge and worked towards where they join. One hand holding grinder other to steady work.

Nicholas Farr20/12/2016 18:32:45
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3988 forum posts
1799 photos

Hi, wonderful thing is the 4 1/2" angle grinder and thin cutting discs. I cannot see what's scary about them, but I have used them for many years and have probably used well over a thousand or two thin discs. Couple of photos of some profiles that I cut at work today, using 75mm x 6mm flat steel bar.

2016-12-20 08.24.53.jpg

2016-12-20 12.12.04.jpg

On the first photo the R/H cut along its length had to be plunge cut to start the cutting process, but the one on the left was started from the L/H edge and the short cut on the R/H side was cut from the R/H edge after I repositioned the G clamp. The cut in the second photo also had to be plunge cut to start with. All these cuts were done totally freehand and just following a scribed line. A quick tickle with a flap disc, soon dressed them up nicely.

The important thing about using cutting discs, is to allow the disc to do the work. You will need a little pressure applied to the disc, but not so much to significantly slow the speed of the grinder down. Putting to much pressure on the disc causes it to wear away much faster and generate heat and the actual cutting process becomes slower. All the cutting on both of these pieces was done with just one disc with a still usable diameter left on the disc.

Regards Nick.

Dave Halford20/12/2016 20:48:03
2536 forum posts
24 photos

As to spark damage, never ever point the spray of sparks at any glass, they will melt in even if not still glowing.

Muzzer20/12/2016 20:51:53
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2904 forum posts
448 photos

Chopsaws and angle grinders make the most godawful noise and you get abrasive dust everywhere. And cheap and nasty examples make an even godawfuller noise. I bought a giant Xmas cracker quality chopsaw a few years back and got rid of it in a garage sale after only using it a couple of times and almost crapping myself.

I have a 4x6 bandsaw myself and would recommend them. If you could get one new for under £200 or used for £100 or so, it's not a big investment.

Like Brian_G, I've heard good things about the Evolution Rage thingies. They are only(?) £100 and seem to be pretty effective. I'd consider one of them if I didn't have a band saw, particularly if I also played with The Brown Stuff.

Murray

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