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Author Topic: Ratchet rake.  (Read 9748 times)

Offline BeeMaster2

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Re: Ratchet rake.
« Reply #20 on: November 14, 2017, 10:20:24 pm »
It does not look like it is torch cut.
220,
What did you use to cut it? Bandsaw maybe.
Jim
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Offline 220

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Re: Ratchet rake.
« Reply #21 on: November 15, 2017, 03:23:59 am »
Torch cut, it is surprising how clean you can cut using a set of wheels. Take the wobble out with a set of wheels or a guide and you will notice a real improvement in the cut finish.
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Offline BeeMaster2

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Re: Ratchet rake.
« Reply #22 on: November 15, 2017, 06:35:44 am »
I just started using my cutting torch this pars week. Lines are jagged as can be. I would love to be able to cut like that. What is the name of those wheels? Do you have a picture of it?
Jim
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Offline Acebird

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Re: Ratchet rake.
« Reply #23 on: November 15, 2017, 08:54:23 am »
If you are doing a number of the same cuts you make a template out of sheet metal smaller then the actual piece you want.  Then put a bearing on the torch.  Ride the bearing against the template.  This will make them all the same.  Now if you are a production shop (old days) you put the torch on a pantograph that is driven by an adjustable speed motor.  With the speed controlled and following a template parts come out like you sawed them.  Today it is all computerized but that takes bucks.
I would assume the wheels control the height of the torch from the work piece.  Is that correct?
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Offline 220

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Re: Ratchet rake.
« Reply #24 on: November 15, 2017, 02:50:41 pm »
Wheels I use are just like this
https://www.boc.com.au/shop/en/au/boc-torch-cutting-roller-guide

You set your height but it is the elimination of the side to side wobble that really improves the quality of the cut.
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Offline Acebird

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Re: Ratchet rake.
« Reply #25 on: November 15, 2017, 05:09:19 pm »
Only problem I see with that is it makes it tough to follow and irregular shaped guide.  Great for straight cuts though.  looking at the wheels again you could use just one wheel and then you could run the torch up to a guide for contoured cuts.
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Brian Cardinal
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Offline 220

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Re: Ratchet rake.
« Reply #26 on: November 15, 2017, 07:12:21 pm »
Like you said Acebird great for straight cuts, you can also get a radius guide, replaces one wheel with a rod that has a pin on the other end. Centre pop you material place the pin in the centre pop hole set your radius and you are cutting a perfect circles or radius.
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Offline Acebird

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Re: Ratchet rake.
« Reply #27 on: November 16, 2017, 08:52:08 am »
Yes, I can see that working very nicely.  Personal preference ... do you push or Pull the torch?  I prefer pulling.
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Brian Cardinal
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Offline BeeMaster2

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Re: Ratchet rake.
« Reply #28 on: November 16, 2017, 01:35:19 pm »
Brian,
I was told, this past week to angle it towards the direction of the cut. Does anyone do the reverse?
Looks like you could also use this tool to follow a pattern/template or a strait edge.
Jim
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Offline Acebird

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Re: Ratchet rake.
« Reply #29 on: November 16, 2017, 02:01:01 pm »
Quote from: sawdstmakr on November 16, 2017, 01:35:19 pm
Brian,
I was told, this past week to angle it towards the direction of the cut.
Maybe there is some sense to that but I don't know what it is.  It could not be done when you are doing radii or contours on thick material.  Any automatic rig I have seen has the torch perpendicular to the surface.  What I have been told in order of importance is adjust the flame, set the height and control the speed.  I would think that rate of speed would be dependent on thickness and flame.  The faster you go the cleaner the cut but by hand any little wiggle and you lose the burn so basically you have to go slower so you don't lose the burn.
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Brian Cardinal
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Offline 220

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Re: Ratchet rake.
« Reply #30 on: November 16, 2017, 02:36:17 pm »
I prefer to pull and prefer cutting left to right going freehand.
I think your order of importance is correct, In my experience a bigger tip and flame than needed usually gives a poorer finish as you only need to reach the ignition temp to cut not the melting point.
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Offline BeeMaster2

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Re: Ratchet rake.
« Reply #31 on: November 16, 2017, 08:27:25 pm »
I used my cutting torch and stick welder today, just practicing. I cut the acetylene pressure back to 4 psi and it cut beautifully. I ran several lines till they looked correct and then welded up some scrap 1/4" plate steal. By the time I got to the the last piece it was looking pretty good.
I spent a lot of time last night watching utube welding and cutting videos.
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Democracy is 2 wolves and a lamb voting on what to have for lunch. Liberty is a well armed lamb contesting the vote.
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Offline Acebird

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Re: Ratchet rake.
« Reply #32 on: November 16, 2017, 09:13:36 pm »
Nothing beats practice and experience Jim.

Oh, My old tractor is sick.  Steering shaft is all buggered up and no one has parts.  Time for some Afro engineering if I am allowed to say that.
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Brian Cardinal
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Offline 220

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Re: Ratchet rake.
« Reply #33 on: November 17, 2017, 03:49:05 am »
Quote from: Acebird on November 16, 2017, 09:13:36 pm
Nothing beats practice and experience Jim.

Yep best way to improve is practice.
I spent most of the day cutting welding and grinding on the firebox for my offset build.
I'll put a few photos up in the thread I started on it.
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Offline BeeMaster2

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Re: Ratchet rake.
« Reply #34 on: November 17, 2017, 10:02:20 am »
Thanks,  I plan to use some scrap steel to practice cutting and welding until I can get it every time. I have a bush hog that needs some welding. I plan to practice and then weld it up. I will have to cut out the crappy welds that I did the first time.
Jim
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Democracy is 2 wolves and a lamb voting on what to have for lunch. Liberty is a well armed lamb contesting the vote.
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Offline Acebird

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Re: Ratchet rake.
« Reply #35 on: November 17, 2017, 10:28:53 am »
Quote from: sawdstmakr on November 17, 2017, 10:02:20 am
I plan to practice and then weld it up. I will have to cut out the crappy welds that I did the first time.
Jim

Not doing it for a living I am a hack but I found some stick is a lot easier to use than others.  I think what I am using is in the 70 series that I get at Tractor supply.  I can get that number for you if you want it Jim.
The stick I am using is 7014 and 7018.
« Last Edit: November 17, 2017, 11:30:50 am by Acebird »
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Brian Cardinal
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Offline BeeMaster2

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Re: Ratchet rake.
« Reply #36 on: November 17, 2017, 02:36:46 pm »
Brian,
I mostly using 7018. I also have 6011 and 6013 in 1/8 and 1/16.
Jim
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Offline 220

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Re: Ratchet rake.
« Reply #37 on: November 17, 2017, 02:37:41 pm »
I use what we call 12P and 16TC for just about everything around the farm, equivalent with your numbering system would be 6013 & 7016.
The other one I find very handy is 309 it is designed for welding 309 class stainless but can also be used for welding SS to mild steel.

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Offline BeeMaster2

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Re: Ratchet rake.
« Reply #38 on: November 17, 2017, 02:43:40 pm »
Thanks 220. I need to get some 309 as well as more 7018. I have a lot of scrap SS laying around so I want the 309 on hand. I did see some at the Tractor Supply Store yesterday. Now that I know what I can use it for I will get it.
Jim
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Offline 220

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Re: Ratchet rake.
« Reply #39 on: November 17, 2017, 02:58:45 pm »
With SS you can just about halve the amps you use.
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