Nightster
Well-Known Member
So the worry is thinning the outside of the bend ?
Cranbrook Springer Forked BTR YD100 Replica Build (without fabrication)
- Thread starter Nightster
- Start date
Oldbiscuit
Well-Known Member
A company I used to work for had a drawn over mandrel tubing bender that was completely covered up with junk an dirt/ grease. Nobody knew what it was or how to use it. It was a monster of a machine, but I got it cleaned up and put into service. I was the head of research and development and I was sending all kind of parts out to get bent before I discovered we had the bender. You could make really nice tight 90deg bends with no deformity. Company was split up years back and I’m assuming the bender was probably scrapped.
Nightster
Well-Known Member
Sand did not prevent creasing for me but I am a beginner so I probably did something wrong.
Nightster
Well-Known Member
No I was just experimenting, still learning and appreciate your interest in trying to help me
Nightster
Well-Known Member
That don’t help much with Concept since this pipe is much thicker, but I appreciate the concept. I get the same part, I just haven’t seen the advantage yet although I know it’s there. I still need more practice, lol. I’d rather have screw some stuff up and learn, then do it correctly. I’ve been spending more time on this site reading threads and I see there’s a lot of people here that know what they’re doing, I’m a beginner. So I’d very much appreciate any interest anybody is taking in my project.
Nightster
Well-Known Member
A true gentlemen thanks
Nightster
Well-Known Member
That’s a good idea, I’m willing to experiment for a good final product.
However my first attempt with sand still provided a crimp. That’s OK, still learning still experimenting I’ll get this
One warning I forgot to mention. You can heat tit up to help the bend but make sure the sand is dry. When I was in school a shop teacher showed us how to do this. In the late 1950's Go Karts were just starting and 1/4 Midget track cars were their predecessors.
He told us he had a student who was bending some pipe a couple of years before for a 1/4 Midget at home and he used sand that wasn't completely dry. To make things even better the young mechanic welded bolts into the ends of the pipe to hold the sand in leaving no place the resulting steam could escape from.
Fortunately his welding wasn't up to standards apparently and one bolt came off the end of the pipe, went through the side of the garage and embedded it's self in the wall of the house next door. He suggested a hole be drilled next to the end of the pipe if we were going to weld up the ends so any steam could escape. If the bolt hadn't come loose the pipe would have split open.
Steve.
He told us he had a student who was bending some pipe a couple of years before for a 1/4 Midget at home and he used sand that wasn't completely dry. To make things even better the young mechanic welded bolts into the ends of the pipe to hold the sand in leaving no place the resulting steam could escape from.
Fortunately his welding wasn't up to standards apparently and one bolt came off the end of the pipe, went through the side of the garage and embedded it's self in the wall of the house next door. He suggested a hole be drilled next to the end of the pipe if we were going to weld up the ends so any steam could escape. If the bolt hadn't come loose the pipe would have split open.
Steve.
Nightster
Well-Known Member
Nightster
Well-Known Member
Wasn’t*
Dry sand is best but it's a must when when heat is used. We had a long discussion about steam and it's power before we were shown how to bend pipe or tubing. Difference between the two is that pipe if measured on the inside and tubing is measured on the outside.
Steve.
Steve.
Nightster
Well-Known Member
Lol ok very primitive and I still got 2 small creases. Not sure whether to work with this piece or try to bend another. Have enough pipe for another try if I like.
