How are bolt hangers made?

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Messages 1 - 20 of total 21 in this topic << First  |  < Previous  |  Show All  |  Next >  |  Last >>
mountainlion

Trad climber
California
Topic Author's Original Post - Feb 15, 2013 - 03:31am PT
Does anyone know if bolt hangers are cut from solid stainless steel with the angle they have, or if they are made from flat stainless steel and then bent to the 90 degree angle, or if they are forged?

weezy

climber
Feb 15, 2013 - 03:37am PT
they are forged on the anvils of gods with flowing beards and hammers that no mortal could brandish without some sort of mechanical assistance.
mountainlion

Trad climber
California
Topic Author's Reply - Feb 15, 2013 - 04:09am PT
Good thing I'm descended from Vikings and my dad has had a beard ever since I can remember. I am now looking for my hammer and an anvil on ebay. What do you think the shipping will cost for the anvil?
JimT

climber
Munich
Feb 15, 2013 - 04:38am PT
Stamped from flat sheet and then bent.
kennyt

climber
Woodfords,California
Feb 15, 2013 - 10:14am PT
With a bolt hanger machine somewhere in China
Mungeclimber

Trad climber
the crowd MUST BE MOCKED...Mocked I tell you.
Feb 15, 2013 - 10:20am PT
Hatched by yaks at southern terminus of the Tuolumne River.
jaaan

Trad climber
Chamonix, France
Feb 15, 2013 - 10:23am PT
They are carved from the solid by Elves.
couchmaster

climber
pdx
Feb 15, 2013 - 11:36am PT
"Stamped from flat sheet and then bent."

Jim T has it. Possibly by the same big assed pressing machine in the same motion. Unless you are talking about yer buddies efforts. They just take 90 degree angle, cut and drill. Or drill and cut. You see lots of that out there in the wild, some of it pretty freaking strong. Guys at work building rail cars, pulls a piece of high alloy 90 degree out of the scrap pile after work and makes up a bunch of hangers. When newly painted they look great, but being high alloy the paint disappears and it starts to rust in record time. So you are clipping something that looks like dog sh#t, but which may test to well over 60kn if you could rig a fixture for it.

The part that always pisses me off on ho made hangers is that the dudes don't grind the top smooth. So a fall could theoretically gouge yer eye out on the sharp edge.


ARRRRGGGHHHH (pirate noise:-)
Mungeclimber

Trad climber
the crowd MUST BE MOCKED...Mocked I tell you.
Feb 15, 2013 - 11:52am PT
Pinnacles used to have a lot of that funky angle iron. Becoming more rare. yeah, the tops always seem to be square and not rounded.
JimT

climber
Munich
Feb 15, 2013 - 02:07pm PT
Iīve not seen them made in one pass though it might be feasible, usually itīs three operations;- stamp, mark and bend then whatever deburring they get which is normally barrel finishing (or not for the nastier ones).
Incidentally one reason they are more expensive than one would think is the tool wear which is fairly horrific as itīs stainless, the last set we got a quote for was about $80,000 for a guaranteed 200,000 units though thatīs German pricing perhaps. The cheapest quote was $20,000 but a life of 50-80,000 units. With 316 stainless the tool life is about 40% lower. And the scrap is about 35-40% of the sheet depending on the design which is discouraging to say the least! .
TwistedCrank

climber
Dingleberry Gulch, Ideeho
Feb 15, 2013 - 02:12pm PT
By elves.
mucci

Trad climber
The pitch of Bagalaar above you
Feb 15, 2013 - 02:20pm PT
I use hangers I make for 1/4" applications.

My good Bro has the Fabrication down, so we crank em out as needed.

Stamped some of em YGD, but don't tell that HOBO guy!

To answer the OP question....

With Beer and Braun.
locker

Social climber
FukUville
Feb 15, 2013 - 02:22pm PT



I guess not...
bhilden

Trad climber
Mountain View, CA
Feb 15, 2013 - 02:28pm PT
I am not a big fan of homemade hangers. For those who do make their own stuff besides the safety factor, one of the things that can happen to homemade steel hangers is that they leak rust all over the rock. Nothing like a trail of rust pointing to the next bolt. Yuch!
Jeremy Ross

Gym climber
Feb 15, 2013 - 03:05pm PT
Satan forges hangers from the wings of dead angels....


Stamped some of em YGD, but don't tell that HOBO guy!


^^^ lol yeah that guy seems pretty mad!


-JR
mountainlion

Trad climber
California
Topic Author's Reply - Feb 15, 2013 - 11:59pm PT
We don't have a hanger distributor here in the Philippines so I was thinking of having some friends send me some. I will take a sample to the machine shop that made my drill holder and see if they can make some out of stainless steel. I also have some 1/2 inch expansion bolts cragnshag sent in his box here that I figure they could make some beefy replicas of for the anchor/rap stations.
Scrubber

climber
Straight outta Squampton
Feb 16, 2013 - 12:46am PT
I think they may be heat treated after the bending step to relieve the stresses created.

K
Ghost

climber
A long way from where I started
Feb 16, 2013 - 12:54am PT
The part that always pisses me off on ho made hangers is that the dudes don't grind the top smooth. So a fall could theoretically gouge yer eye out on the sharp edge.

Don't know about gouging out an eye, but there's nothing theoretical about gouging a slice out of your butt.

There were a lot of home-made hangers at Squamish in the early days. A lot of thick aluminum things with sharp corners. A fall from above one of those did tear a chunk out of one climber's ass.
Ihateplastic

Trad climber
It ain't El Cap, Oregon
Feb 16, 2013 - 01:09am PT
The ones rom China are made from old chromed Chevy bumpers and then marked "Stainless Steal."
JimT

climber
Munich
Feb 16, 2013 - 03:21am PT
I think they may be heat treated after the bending step to relieve the stresses created.

Iīm not aware of anybody doing this, it is unescessary and mostly counterproductive since bending stainless steel makes it stronger if you are using annealed sheet to start with which is the standard condition it is delivered in. The bend radius is chosen (or should be) to avoid problems in this area.
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