CUT STEEL WITH ANY MITER SAW - MODIFIED SPEED CONTROL SAW

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I been wanting a steel chop saw or band saw for my garage, but didn't want to pay the full price for one. I have used abrasive chop saws before but was not impressed on the accuracy of the cuts especially when doing angles. And bands saws go for about $300 and above. So I decide to modify a Ryobi 7 1/4 in miter saw since I occasionally do metal work as a DIYer and wanted to keep it wallet friendly. The total cost for this was approximately $100, $50 for the Ryobi miter saw, which I bought used on Facebook Marketplace, but didn't realize it was missing the clamping mechanism. I took the speed controller from my old broken random orbital sander for this project. I also tested the speed controller, on my Rigid 12in miter saw originally and it worked perfectly fine.
Speed Controller Makita model:BO5041 Controller: part number 631955-4 Price $19.14 www.ereplaceme...
Steel used for this project:
1.5in x 1.5in x 1/8in thick angle iron
1.5in x 2in x 1/8in thick rectangle stock
Ryobi Miter saw TS1143L 5800 r/min (RPM) 7 1/4 saw(184mm) Purchased used on Facebook marketplace for $50
Diablo 7-1/4 in. x 48-TPI Cermet Steel Demon Ferrous Metal Cutting Saw Blade Max RPM 5800
amzn.to/3qhlKsj
Diablo D1260CF 12-inch Steel Demon 60T
amzn.to/2LKZE28
Freud-Diablo 6 in CARB TIP Metal RECIP 3 PK
amzn.to/3pgbP4R

Опубликовано:

3 окт 2024

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Комментарии : 69

@tiredoldman5329 Год назад

I have to say, you are awesome. I bought the switch you mentioned. Did the same thing to my old craftsman miter saw. I attached mine to the outside of the case. I'm lazy. Spins at 2400 rpm. Perfect for the 10 inch harbor freight blade. I'm cheap too. Lol. Now I'm going to steal your clamp idea. Kudos bro! Thought about the 850 dollar saw, forget it's name. You saved me a ton of cash!

@linh-gineering7774 Год назад

Nice 👍

@boxer71c55 Год назад

Without a doubt the best vid on YT showing how to accomplish this!! This alone is worth a sub!

@eddkennedy6458 2 года назад

Very clever bit of work there, you have given me the incentive to carry out this modification on my mitre saw , thank you.

@jessezepeda3990 3 года назад

Love the creativity and reengineering bro!

@linh-gineering7774 3 года назад

Thank you

@johnpoole4561 Год назад

Nice work! I am going to do that to my saw. Wishing I hadn't thrown out my old broken sander now. But when I was watching the clamp making portion, I had an idea. What about just cutting the screw assembly end of a big C-Clamp off, and making a way to mount it to the saw. Might make it easier, and give you a rotating and conforming head to engage the stock with. Haven't fully thought it out yet, but I thought I would throw it out there in the brainstorming bucket. Thanks for the video.

@jimmywest1 2 года назад

This is exactly what I was looking for. Thank you.

@erikandersen4811 2 года назад

I love how you did these different mods. I’m thinking about doing something similar to a larger saw so it can swap between abrasive blades at high speed or cold cut blades that need to move slowly. Also really like the clamp you added. Probably going to do that and add magnets so I can swap different size V blocks to the clamp.

@MrTimdtoolman1 Год назад

Nice work, I like the way you repurposed the speed controller.

@mikeyd717 Год назад

I've used pressure sensitive triggers off drills and sawzalls for diff applications. The best is for the oscillatingulti tools. It's nice to be able to start slow and ease into those plunge cuts with those things. Had a bosch that even with it's diff speed settings you ld have trouble starting and maki clean cuts with it because it would want to jump and dance around.

@joeramirez9787 10 месяцев назад

Think that will work with a double bevel slinging compound saw I saw the evolution miter saw is 1450 rpm and the 12 inch dewalt miter sliding saw is 3900 rpm what you think

@jameshisself9324 Год назад

The problem is that speed reduction done this way cuts the motor torque significantly. To maintain the torque you either have to use a gear reduction or change the motor for one designed for full torque at the lower RPM.

@ddwieland Год назад

I thought that might be the case, but the video shows a strong cut at lower speed. If the torque is reduced, it sure isn't by much.

@edelveraprbassplayer Год назад

It is easiest to put the Outside Tool Switch on the Positive Wire before going into the Tool. There is no need to break the tool and only the cut is made in the cable by adding the switch.

@iman80skid91 Год назад

Good idea... But just buy a inline variable speed controller from fleebay that plugs straight in... Also can be used for other machines

@zukjeff Год назад

use or make inline speed controller. No need to modify saw. Also professional metal cut off saws has different motor air vents and bearings to save metallic dust and chips damaging the saw.

@terryatpi Год назад

What I said 👍

@Dahna_ Год назад

now will it have a lower torque at slower speeds or will the torque be the same?

@ricardofredeluces1187 Год назад

What did you install to control the RPM and how did you connect it to the system.. can you give me the intruction on how to do it.. thank you very much…

@alanviner3711 3 года назад

nice fix, looks good

@GS-kb1vy 9 месяцев назад

How do you know the selected speed (rpm) ?

@terryatpi Год назад

Can’t I just splice the speed controller into the main line from the wall to the saw ?

@peterb1607 Год назад

Why did you not just by a speed control unit?

@jarredsegal6842 6 месяцев назад

Only problem I see with this is it will burn out the motor pre maturely as all your doing is essentially wiring in a dimmer switch like they sell for routers and all that does is starve the motor of power rather than using a variac controller which alters syne wave of the current Which will slow the motor while keeping most of the power

@johnnyteague3407 3 года назад

Did the saw and the donor sander have close to the same amp rating and wattage rating.....i cant see this working if the sander was 3.5 amp and 750 Watts and the speed control working on a saw rated at 10 amps and 2000 Watts

@ryancappo Год назад

The motor might want 10A, but a good speed controller for a 3.5A device might limit the top amount of Amps available to the motor to 3.5A

@tisprintcraftstv 2 года назад

Great video please where can I get the speed controller to buy?

@GS-kb1vy 9 месяцев назад

eBay look for fan speed controller

@grantadan Год назад

Where did you get the rpm controller I just bought a 10 inch and I can't use the Diablo blade due to max RPM is 3000 and machine is 4800

@linh-gineering7774 Год назад

www.ereplacementparts.com/controller-p-672594.html

@brianwood876 2 года назад

Going to try this this weekend.... You posted this a year ago, how has it held up?

@linh-gineering7774 2 года назад

It's still working very well, I've only had to replace the blade this year do to heavy use of cutting thicker pieces steel.

@brianwood876 2 года назад

@@linh-gineering7774 thanks for the update... I'm going to give it a shot with a spare 10" saw I have.

@Digital_Dairy Год назад

The steel demon blades are rated for the speed the saw already cut at. Curious why go though the effort of using the speed control.

@lintrobb4628 8 месяцев назад

That is incorrect, do read the safe Max operating speeds for the various-sized Diablo Steel Demon blades. The larger the blade diameter, the lower the MSO speed.

@Digital_Dairy 8 месяцев назад

@@lintrobb4628 the 7-1/4" steel demon has a max rpm of 5800. All the Ryobi 7-1/4" miter saws I found spin at 5350.

@JeffCanyon 3 года назад

Did you slow the saw down to around 1600 RPM's? Didn't you lose a lot of torque when you slowed the saw down? Nice work..

@linh-gineering7774 3 года назад

I have slowed it down to the lowest setting and had no issues cutting or loss of torque. I find it cuts better with very minimal spark when cutting at slower speeds.

@jvaldes15 2 года назад

Do you think the speed control will work on a Dewalt DW715? 4000rpm to 3000rpm?

@linh-gineering7774 2 года назад

I tested it out on my 12in Rigid mitersaw and was able to lower the RPMs.

@shawnsrepairs9514 2 года назад

The saw you are modifying is 5800 rpm (I believe) and the blade is rated for 5800 also. Would it have worked if you just put the blade on and that's it?

@allenpiper1935 2 года назад

I don't think it's correct that the Diablo blade in the video is rated at 5,800 RPM. That speed wouldn't align with pretty much any metal cutting saw. RPM is a key difference between types of chopsaws. Toothed blades on metal chopsaws such as the Evolution and Dewalt are rated at 1,400 RPM. Abrasive blades will usually go with a chopsaw rated around 3,700 RPM, and general construction chopsaws for wood and such will be 5,000 to 6,000 RPM like this Ryobi in the video. Cutting metal in general usually needs to be down at slower speeds, there is a whole science of feed rate and tooth speed for milling since faster speeds are prone to excessive heat and/or damage to the cutting teeth as well as the material. Bottom line: you could just put the metal blade on the saw at 5,800 RPM, but it will likely not go well.

@user-ug7pm4ln3f Год назад

Yes. It would cut fine. But the blade would not last very long. I get about 40 cuts on 14 gauge 1 inch square tubing using a harbor freight metal blade.

@kneecut1038 Год назад

I was also thinking the same, since they are using Steel Demon on 7 1/4 circular saws without modifying the motor. Rpm is fine i think, but i want to hear others too

@tiredoldman5329 Год назад

Probably 1400 rpms.

@frankhouck4446 Год назад

@@allenpiper1935 not quite. The evolution 14” blades are rated at 1600rpm and the saws run at about 1450rpm. The 7 1/4” Evo mild steel blades are rated at 3900rpm and the matching saws run about the same. It’s about blade tooth speed (linear speed), not RPM. A 14” blade tuning at 1450rpm has about the same tooth speed as a 7 1/4” running at 3900rpm (radians/min x Radius gives you tangential velocity of blade). My old Dewalt runs at 4000rpm. I am looking for cheap way to reduce speed to 1450rpm so I can run a 14” Evolution 66 tooth blade. I’ll adcd a clamp like he did in video.

@dc5duben96 11 месяцев назад

nice mod👍🏼

@brianfong3954 2 года назад

Is there any other option to the speed controller to buy ?

@kripanandsewpersaud1677 2 года назад

What is the rpm in lowest setting

@tiredoldman5329 Год назад

Mines goes down to 2400 rpms on my craftsman. With this switch.

@buckray9011 3 года назад

Great video but I'm not too educated on electronics and stuff but wouldn't the saw have cut steel just the same with that blade. To my knowledge that blade is the reason for being able to cut steel easily. Either easy you're very intelligent obviously with knowing how these types if things actually work. Great video

@linh-gineering7774 3 года назад

Yes you can cut the metal at higher speeds or the max rated 5800 rpms which this saw recommends, but it does create a good amount of sparks and wears down the blade faster. Most metal chop saws I've seen on the market operate at about 1800 rpms or less. The benefits of cutting at slower speeds with this type of blade is that it doesn't produce much heat and has minimal sparks, producing a smooth, burr-free, instantly workable finish that can be handled immediately after being cut. I do like the angles cuts that this miter saw is capable of doing compared to the traditional metal abrasive chop saws. I was just curious to see if it was possible to accurately cut steel with a cheap miter saw and still make budget friendly compared to ones that go for $300 to $400 dollars. Total I spent on this was about $90 dollars. I do not recommend to try this if you have no experience with working with electrical.

@buckray9011 3 года назад

@@linh-gineering7774 I'm not messing with any electrical components due to lack of knowledge. But thank you very much for ur information. I've done alot of research since watching ur video and understand the reasoning for doing this and that these blades are cold cut blades designed for operating at lower rpms. Thank you for ur video it was educational amd just fukn cool lol. Have you got any experience with thermite lance cutting? It is amazing for huge steel

@francesb656 3 года назад

I wish I had seen this before. I feel really miserable. I ruined a Diablo blade, the most expensive, because I am an ignorant

@linh-gineering7774 3 года назад

I wouldn't feel bad, I constantly break things from trial and error. I broke a tooth of the blade the first cut when I didn't have the clamping mechanism on it. Pretty terrifying when the saw jumps. Anyways I just wanted to put this video out there, that there is always another way to do things when you think outside the box.

@mikeyd717 Год назад

You ruined a diablo blade. Sir you might as well killed a unicorn. I would tell noone of this. Hopefully someday long from now. You will ba able to forgive yourself. It'll take a lot of counseling. But you can do it. I believe in you.

@bobd.fletcherjr4912 2 года назад

🇺🇸👍👍👍👍👍👍👍👍👍

@danielcastaneda5249 3 года назад

Do you think the speed control will work on a regular metal abrasives chop saw?

@linh-gineering7774 3 года назад

The controller will slow it down, but I don't exactly know the rpms it will spins at. If you do attempt to try it, I would recommend buying a handheld digital tachometer which you can buy on Amazon for about $20.

@johnnyteague3407 3 года назад

I am going to give it a try. I have and old broken Bosch 4x28 belt sander . it is rated at 6.5 amp. I have a Hitachi 6 amp abrasive chop saw in the storage shed. It uses a 10 inch blade.

@obserwer Год назад

@@johnnyteague3407 and, how did it end?

@officialWWM Год назад

You don’t need to mess around with all that speed control nonsense. Just buy a blade that’s rated to the speed of your saw 🙄

@Dahna_ Год назад

but the point is to be able to cut metal without over heating and too many sparks. if you just buy a blade that is the same high speed rating as the saw its too fast to cut metal nicely and it won't last more than a few cuts.

@tiredoldman5329 Год назад

They don't make one.

@officialWWM Год назад

@Tired Old Man how fast is your saw? Mine is 3200 rpm and I have a blade for it!

@tiredoldman5329 Год назад

@@officialWWM Around 4800. Which blade do you have? Everyone I've seen is low rpm.