Making A Callibration Machine

[luuc]

Today I've only tested a 7" 5/16 HRS, just to try the machine.

http://i36.tinypic.com/wurs6t.jpg

IM Red Nail in a shaped piece of metal (1/2" * 1"), a 30mm axle (a bit modified) pressing on the middle.

I put as much weight on it till the nail is completely on the metal (40 degrees).

http://i33.tinypic.com/289ihw2.jpg

To easily be able to change the amount of weight, I made a leverage machine, the joint between the 'pressing' axle and the lever is easily to unhook.

I'll make some pictures tomorrow, that 'll be a little more clear I hope.

If anyone wants me to test pieces of steel they have (if you think my machine is reliable enough).. It's possible.

(Although I hope I don't mess up anyone elses 'trade', if I do please say it)

(Please don't mind the spelling mistakes, I'm a little excited right now )

Edited August 12, 2008 by luuc

[Paul Knight]

You are a genius! that looks like it would work very well! the only suggestion I would like to make: don't bend the bars to 40 degrees because then your results will vary from everyone else calibrating the steel - everyone takes the bars to 30, plus if you let the bar hit the bottom of the apperatus, then who knows if it might have bent further? Freakin awesome idea! Major thumbs up!

[wscorpion]

Nice work Luuc!!!

What does the rednail rate?

it should be around 180kg

[luuc]

You are a genius! that looks like it would work very well! the only suggestion I would like to make: don't bend the bars to 40 degrees because then your results will vary from everyone else calibrating the steel - everyone takes the bars to 30, plus if you let the bar hit the bottom of the apperatus, then who knows if it might have bent further? Freakin awesome idea! Major thumbs up!

Thanks Paul!!

When I use the machine I'm able to look how far it bend, so If the bar kinks to ±20 degrees, I'll add another 5kg's (or 2,5 or 1) until it touches.

Thanks, I'll bend the bar back to 30 degrees.

Nice work Luuc!!!

What does the rednail rate?

it should be around 180kg

Thanks Mark!!

I'm going to test it and as much other pieces as possible today, also the 3/8 CRS.

[honk]

Very nice!

[luuc]

First results: (all were 6,5" long)

9mm (almost 3/8") C37 CRS: 240kg

5/16" round C45 CRS: 210kg

hex shaped 5/16" C37 CRS: 205kg

5/16" Stainless: 185kg

Red Nail: 180kg (Which is about C37 steel)

10mm threaded bar: 170kg

5/16" square HRS: 140

5/16" round HRS: 100

Mark, you said the Red Nail would be 180kg, at 7" probably, I put 150 at the start, and kept adding 5kg's, so I think my Red's are slightly easier.

As you can see there is a difference in C37 and C45 CRS, there is also 52-steel, but I haven't been able to find it.

FBBC has C37 CRS, or something close to it.

I'm going to do more callibrations, but this is nice for now.

Edited August 13, 2008 by luuc

[luuc]

Also tried a G5 @ 5" (can't find longer ones here), but when nothing happened after putting 280kg's on it I just stopped. :P

[carlsipes]

Very cool!!! I can't wait to see more calibrations.

[Booyah!!!]

Very Nice set up!!!!! Looks like your figures vary a bit from Erics, are you taking into account he takes the measurement 3/4 inch from each side? If the ends of the nail contacts your device, it seems like you would be able to cut 1.5 inches from the bar and maybe that would put you in the same park as Erics cals Very Nice!!! Good luck Man!!!!

[luuc]

Thanks for the information Booyah!!!, that's helpfull!!

I'll have another try this week, today was more like a test to see how much weight was needed, I've got to work a bit more on the machine itself too, adding weight is not the easiest thing to do.

I'm going to retest every piece again, and some other lengths/steel types as well.

I've ordered some FBBC stuff as well, I hope it'll come in in a few weeks, hopefully they will be able to tell me if the machine is equal to the callibration machines Eric uses.

[wscorpion]

Luuc, could you give 10mm x 7" HRS a try?

I was planning on sending a piece to Eric for calibration, but this is even better

[luuc]

Will do! (I guess all HRS in Holland is the same..)

I suppose I have to cut a piece of 5,5" right? To recreate Eric's machine.

I'm changing my 'design' by the way, the way I had to add weight was too difficult since I had to ballance the whole pile of weight when adding weight.

http://i37.tinypic.com/15x5wd2.jpg

I think this will be better.

[wscorpion]

Will do! (I guess all HRS in Holland is the same..)

I suppose I have to cut a piece of 5,5" right? To recreate Eric's machine.

I'm changing my 'design' by the way, the way I had to add weight was too difficult since I had to ballance the whole pile of weight when adding weight.

http://i37.tinypic.com/15x5wd2.jpg

I think this will be better.

Looks great Luuc!!!

Guess HRS here doesn't really differ that much

I guess 5.5" would be similar to Eric's result.....

[luuc]

Results of the new callibration: (from easy to hard)

7mm C-37 CRS: 120kg

8mm HRS: 120kg

8mm Rebar: 160kg

8mm square HRS: 165kg

IM Red Nail (±C-37 CRS): 195kg

10mm threaded steel bar: 200kg

8mm stainless steel: 200kg

8mm hex shaped C-37 CRS: 225

8mm C-45 CRS: 230kg

10mm HRS: 230kg

9mm C-37 CRS: 245kg.

This is all callibrated for a length of 7".

(For me it's unbelievable that a type of metal with a diameter of 8mm has the same strength as 10mm)

8mm = 5/16"

10mm = bit over 3/8"

[wscorpion]

Results of the new callibration: (from easy to hard)

7mm C-37 CRS: 120kg

8mm HRS: 120kg

8mm Rebar: 160kg

8mm square HRS: 165kg

IM Red Nail (±C-37 CRS): 195kg

10mm threaded steel bar: 200kg

8mm stainless steel: 200kg

8mm hex shaped C-37 CRS: 225

8mm C-45 CRS: 230kg

10mm HRS: 230kg

9mm C-37 CRS: 245kg.

This is all callibrated for a length of 7".

(For me it's unbelievable that a type of metal with a diameter of 8mm has the same strength as 10mm)

8mm = 5/16"

10mm = bit over 3/8"

This is 7" you say? so that would be ~8.5" on Erics scale?

hmm....

Well, it's not that weird that the 10MM HRS doesn't rate that high. Try a shorter piece, I'm pretty sure you'll see that on a 6" or 5.5" length that the HRS is harder then the CRS beause of the wider bend

I want to give that 9mm stuff a try though, where did you get it? It's harder then the 10mm HRS so that should be a nice challenge

[luuc]

No, I meant I did take a 5,5" piece, but in Eric's machine it would be a 7" piece.

Sorry for that Mark.

To 30 degrees the bend is not a lot wider than the 9mm CRS.

I think the crush down will show that the 10mm HRS is way stronger than the 9mm CRS, but on the kink the CRS wins.

I'll just send you some pieces tomorrow (or monday) to try it.

I can get any diameter of HRS and CRS, so if you need anything, just say it.

(The stores are Beuken and Kint, in Bergen op Zoom (Beuken) and Tholen (Kint).)

[wscorpion]

No, I meant I did take a 5,5" piece, but in Eric's machine it would be a 7" piece.

Sorry for that Mark.

To 30 degrees the bend is not a lot wider than the 9mm CRS.

I think the crush down will show that the 10mm HRS is way stronger than the 9mm CRS, but on the kink the CRS wins.

I'll just send you some pieces tomorrow (or monday) to try it.

I can get any diameter of HRS and CRS, so if you need anything, just say it.

(The stores are Beuken and Kint, in Bergen op Zoom (Beuken) and Tholen (Kint).)

Hmmm, well I still think 9mm CRS is going to be hard, but ok, we'll see, it would be great if you could send me a few pieces.

Have you given the 9mm a try already? how did it go?

I'll give those stores a visit once I start focusing on braced bending again, would be nice to target some 14mm and 16mm stuff

[luuc]

Tried pre kinked 7" lengths but they didn't move at all..

My hand injury is pretty much over, so soon I'll start bending again, hopefully I can get that 8mm C-45 CRS after a bit of training!

[luuc]

3 new callibrations;

1/4" G8: 155kg

shiny bastard: 225kg

5/16" G5: 240kg

I'm so dumb... I tested the G8 for a length of 7", but ofcourse they're only 6"long...

Edited August 18, 2008 by luuc

[luuc]

Bastard: 180kg