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Author Topic: JD Squared bender  (Read 14039 times)

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Online fabr

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Re: JD Squared bender
« Reply #15 on: June 19, 2011, 07:45:51 PM »
still lost
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Offline Carlriddle

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Re: JD Squared bender
« Reply #16 on: June 20, 2011, 06:38:17 AM »
Kinda like a cordless caulk gun, when you stop it backs up a bit to keep it from dripping. 
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Online fabr

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Re: JD Squared bender
« Reply #17 on: June 20, 2011, 06:59:59 AM »
Ya I know but what can a slot do? I'm sure that I'll say" OH ,NOW I see" if you can describe what a slot can do that releasing the ram pressure won't. I'm sure I'm missing something but WTH is it? Explain this to me."I plan to make the part that enguages the pin on the moving arm a little slot. "
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"There can be no divided allegiance here.  Any man who says he is an American,
but something else also, isn't an American at all.  We have room for but one
flag, the American flag... We have room for but one language here, and that is
the English language... and we have room for but one sole loyalty and that is a
loyalty to the American people."
Theodore Roosevelt 1907

-----------------------------------------------------------
 " You have all the right in the world to believe any damn thing you'd like, but you don't have the right to demand that I agree with your fantasy"

LiveWire

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Re: JD Squared bender
« Reply #18 on: June 20, 2011, 07:50:33 AM »
If the ram is hard attached to the arm, then when you pull the ram back, the arm pulls back. With a slot, you can pull the ram back the length of the slot and the arm will settle somewhere in the middle.
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Online fabr

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Re: JD Squared bender
« Reply #19 on: June 20, 2011, 08:09:53 AM »
AHA!!!!! NOW I see.
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"There can be no divided allegiance here.  Any man who says he is an American,
but something else also, isn't an American at all.  We have room for but one
flag, the American flag... We have room for but one language here, and that is
the English language... and we have room for but one sole loyalty and that is a
loyalty to the American people."
Theodore Roosevelt 1907

-----------------------------------------------------------
 " You have all the right in the world to believe any damn thing you'd like, but you don't have the right to demand that I agree with your fantasy"

Online fabr

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Re: JD Squared bender
« Reply #20 on: June 20, 2011, 08:21:00 AM »
Gonna be a long slot for that tho now that I think about it. At least for 4130 there is a LOT of springback.
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"There can be no divided allegiance here.  Any man who says he is an American,
but something else also, isn't an American at all.  We have room for but one
flag, the American flag... We have room for but one language here, and that is
the English language... and we have room for but one sole loyalty and that is a
loyalty to the American people."
Theodore Roosevelt 1907

-----------------------------------------------------------
 " You have all the right in the world to believe any damn thing you'd like, but you don't have the right to demand that I agree with your fantasy"

LiveWire

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Re: JD Squared bender
« Reply #21 on: June 20, 2011, 08:45:10 AM »
The slot does not need to be long enough to accommodate all the spring back, just long enough for the ram to stop after you let off the button, valve, etc. You hit retract, as soon as the ram pulls away from the one side of the slot, you let off.
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Online fabr

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Re: JD Squared bender
« Reply #22 on: June 20, 2011, 09:41:34 AM »
Springback on 1.25x.090 4130 is about 1.5 inches arm travel per pull on a PT105. I'd need about a 1.5 inch long slot in the ram to do it. I have an idea of how to do it without losing ram travel tho. Need to get the ram and mount here .
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"There can be no divided allegiance here.  Any man who says he is an American,
but something else also, isn't an American at all.  We have room for but one
flag, the American flag... We have room for but one language here, and that is
the English language... and we have room for but one sole loyalty and that is a
loyalty to the American people."
Theodore Roosevelt 1907

-----------------------------------------------------------
 " You have all the right in the world to believe any damn thing you'd like, but you don't have the right to demand that I agree with your fantasy"

LiveWire

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Re: JD Squared bender
« Reply #23 on: June 20, 2011, 10:13:56 AM »
If you had a 1" slot and you move the ram back 2", the pin would be in the middle of the slot. All that matters is that the pin is not touching either end of the slot. If it is, then the angle reading is not accurate.
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Online fabr

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Re: JD Squared bender
« Reply #24 on: June 20, 2011, 11:19:40 AM »
???
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"There can be no divided allegiance here.  Any man who says he is an American,
but something else also, isn't an American at all.  We have room for but one
flag, the American flag... We have room for but one language here, and that is
the English language... and we have room for but one sole loyalty and that is a
loyalty to the American people."
Theodore Roosevelt 1907

-----------------------------------------------------------
 " You have all the right in the world to believe any damn thing you'd like, but you don't have the right to demand that I agree with your fantasy"

Offline Hammerworks

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Re: JD Squared bender
« Reply #25 on: June 20, 2011, 01:06:49 PM »
For those going with the HF ram this looks pretty cool and simple.

http://www.swagoffroad.com/Tubing_Bender_Air_Hydraulic_Mount.html
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Online fabr

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Re: JD Squared bender
« Reply #26 on: June 20, 2011, 01:21:45 PM »
I'd  seen that before but have concerns about clamping to the thin outer tube of the jack.
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"There can be no divided allegiance here.  Any man who says he is an American,
but something else also, isn't an American at all.  We have room for but one
flag, the American flag... We have room for but one language here, and that is
the English language... and we have room for but one sole loyalty and that is a
loyalty to the American people."
Theodore Roosevelt 1907

-----------------------------------------------------------
 " You have all the right in the world to believe any damn thing you'd like, but you don't have the right to demand that I agree with your fantasy"

LiveWire

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Re: JD Squared bender
« Reply #27 on: June 20, 2011, 01:36:09 PM »
Quote from: masterfabr on June 20, 2011, 01:21:45 PM
I'd  seen that before but have concerns about clamping to the thin outer tube of the jack.

I would agree with that, especially the way that clamp works. It is basically a giant muffler clamp pressing in a narrow area.
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Offline Nutz4sand

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Re: JD Squared bender
« Reply #28 on: June 20, 2011, 04:18:20 PM »
Quote from: Punkur67 on June 19, 2011, 07:37:51 PM
Sounds like he wants to make a slot in the ram atachment so he can back the ram pressure off and the tube can settle to give an acurate reading.

Ding ding ding! We have a winnah!   Sorry was not able to get to a simple sktch. Been running ragged these last few weeks.
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Online fabr

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Re: JD Squared bender
« Reply #29 on: June 20, 2011, 04:45:38 PM »
We had that all figured out a while back.Just discussing how much slot is needed.
Logged
"There can be no divided allegiance here.  Any man who says he is an American,
but something else also, isn't an American at all.  We have room for but one
flag, the American flag... We have room for but one language here, and that is
the English language... and we have room for but one sole loyalty and that is a
loyalty to the American people."
Theodore Roosevelt 1907

-----------------------------------------------------------
 " You have all the right in the world to believe any damn thing you'd like, but you don't have the right to demand that I agree with your fantasy"
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