O&MM Fabricator - March/April 2017 - 23

creates enough friction to lock the swingarm, steel and arbor together, making them
one continuous unit. The steel and arbor
with this friction will rotate with the swingarm, pulling metal into the bend from the
back side of the bender.
Hand pressure is sufficient when tightening up the dog or pushing in a wedge. The use
of a hammer to tighten the dog or a wedge
is not necessary and will prematurely wear
out the arbor-hole drilled in the swing-arm.
Rotating the Arbor with
Mechanical Advantage
Sketches #12 and #13. Another way we
can make the arbor rotate, is by giving the
swing-arm a mechanical advantage over the
frame side of the bender. First, on the swingarm, put the dog (on top of the swing-arm)
or a bending-block (inside the swing-arm)
in the first ¾" hole from the arbor. Next, on
the frame-side, place a roller in the second
¾"hole from the arbor. We have now offset
the location of the fulcrum point in between
the tooling in the swing-arm and frame. The
dog no longer needs to press on the arbor,
because the new leverage differential will
rotate the arbor.
Sketch #12 is the same configuration as
Sketches #5 and #1. Sketch #13 is the same
as Sketches #6 and #2. Sketches #9, #10 and
#11 have their rollers set aback in the frame
also, so instead of just mechanical advantage
(which is sufficient to rotate the arbor) in
Sketches #9 -#11 mechanical advantage plus
pressure pulls metal into the bend.
The Tightest Bends?
Keeping the roller as close as possible to
the arbor (the first ¾" hole) and using pressure with a dog or wedge, produces a little
tighter bend than when the roller has been
moved back to hole #2.
Stopping the Arbor's Rotation
with a Mechanical Advantage
Sketches #14 and #15. If we reverse the
positioning of the fulcrum point as described
above, the new positioning will keep the arbor
from rotating. First, move the dog (on top of
the swing-arm) and/or a roller (inside the
swing-arm) back to the second ¾" hole from
the arbor. Keep the dog adjusted so it is as
far-away from the arbor as possible. Then,
move the bending block and/or a non-rotating
top-tool up to the first ¾" hole in the frame. For
the non-rotating top-tool, you can reverse the

When setting up the bender,
ask yourself:
1. Where should metal be fixed in the
bender? In the swing-arm or in the frame?
2. How should the metal be fixed? With a dog,
wedge or an offset the fulcrum point?
Hossfeld roller, so the non-rotating side is
closest to the arbor. The frame-side tools
(now closest to the arbor) and the arbor will
now have the majority of pressure against
them. With the majority of friction on the
arbor and frame-side tool, metal will not slide
(it will be very minimal) across the frameside and rotate the arbor. Instead, metal will
slide across the dog or roll on the roller in the
swing-arm, as the arm is being pulled.
Sketch #14 reproduces the action illustrated in Sketches #7 and #3. Sketch #15 is
the same as Sketches #8 and #4.
Controlling Rotation with a Cam-Die
Sketch #16. To control the arbor when
bending inside the Hossfeld, a cam-die can
be slipped over the arbor. The cam-die puts
friction against the arbor, which keeps the
arbor from turning. The arbor's rotation however, no longer matters because the metal
being bent is not touching it. The frame side
of the tear-drop shaped cam-die rests against
the metal to be bent, which keeps the camdie from rotating as metal is pushed around
it. With the cam-die installed, there is more
friction on the frame-side of the bend and
stationary cam-die than on the swing-arm
roller. Metal will stay as positioned (there
will be minimal slippage) on the frame-side
of the bender.
If you need a larger inside radius in the
metal being bent around a cam-die, bend
shims around the cam-die to increase
its size. Bending hot metal is one way to
eliminate spring-back when a shim is
being formed.
Rotating the Bending-Blocks
Sketch #17. If bending thin metal, you can
put both bending-blocks in the ¾" holes closest to the arbor. The mounting holes drilled
vertically in the bending-blocks are not centered. Install the block in the swing-arm, so

its thinnest side is facing the metal to be bent.
Next, install the bending-block in the frame, so
its thickest side is facing the stock to be bent.
You might have to turn one of these blocks
upside down to make the blocks fit.
The thick and thin sides of the blocks facing the metal are only being referenced to
explain easy indexing. What we are actually
after with the bending-blocks positioned and
indexed as described, is what is happening
on the sides of the blocks. The block sides
have now been shifted in the direction of the
swing-arm. This means, the fulcrum point has
been offset towards the frame-side block.
Metal will now stay where it is positioned
with minimal slippage on the frame-side block
(the block closest to the arbor) and the metal
will slide across the swing-arm block when
making the bend.
In my bender, which is a little sloppy from
wear, 1/8" thick metal is the thickest metal
that will fit in-between the frame side block
and arbor with the above configuration.
When Setting up the Bender, Ask Yourself:
1. Where should metal be fixed in the bender?
In the swing-arm or in the frame?
2. How should the metal be fixed? With a dog,
wedge or an offset the fulcrum point?
I am not going to conclude by saying
"Good Luck." Setting up a Hossfeld Bender
correctly is definitely not about luck.
Setting up a Hossfeld correctly is all about
understanding the Bender, plus owning a
set-up manual.
What I am going to conclude with, is one
more question.

Q

What is the Price of Versatility
When Owning a Hossfeld?
A. A steeper learning curve than what is
required for a simple bender.
Uncle Bob
March/April 2017 * O&MM Fabricator | 23



Table of Contents for the Digital Edition of O&MM Fabricator - March/April 2017

President’s Letter
NOMMA Network
Nomma Education Foundation
Dodge Planroom
The Hossfeld Bender
Common Challenges With Cable Railing Installations – and How to Overcome Them
2017 Top Job Winners Showcase
Skilled Employment Practices
Financing Acquisition Growth and Profits
Supplier Members
New Nomma Members & Iron Club Members
People
Products
Gargantuan, Pet-Inspired Fountain Center Stage in Canadian Park
Index of Advertisers
O&MM Fabricator - March/April 2017 - cover1
O&MM Fabricator - March/April 2017 - cover2
O&MM Fabricator - March/April 2017 - 3
O&MM Fabricator - March/April 2017 - 4
O&MM Fabricator - March/April 2017 - 5
O&MM Fabricator - March/April 2017 - 6
O&MM Fabricator - March/April 2017 - 7
O&MM Fabricator - March/April 2017 - 8
O&MM Fabricator - March/April 2017 - 9
O&MM Fabricator - March/April 2017 - President’s Letter
O&MM Fabricator - March/April 2017 - 11
O&MM Fabricator - March/April 2017 - 12
O&MM Fabricator - March/April 2017 - NOMMA Network
O&MM Fabricator - March/April 2017 - 14
O&MM Fabricator - March/April 2017 - Nomma Education Foundation
O&MM Fabricator - March/April 2017 - Dodge Planroom
O&MM Fabricator - March/April 2017 - 17
O&MM Fabricator - March/April 2017 - 18
O&MM Fabricator - March/April 2017 - 19
O&MM Fabricator - March/April 2017 - The Hossfeld Bender
O&MM Fabricator - March/April 2017 - 21
O&MM Fabricator - March/April 2017 - 22
O&MM Fabricator - March/April 2017 - 23
O&MM Fabricator - March/April 2017 - 24
O&MM Fabricator - March/April 2017 - Common Challenges With Cable Railing Installations – and How to Overcome Them
O&MM Fabricator - March/April 2017 - 26
O&MM Fabricator - March/April 2017 - 27
O&MM Fabricator - March/April 2017 - 2017 Top Job Winners Showcase
O&MM Fabricator - March/April 2017 - 29
O&MM Fabricator - March/April 2017 - 30
O&MM Fabricator - March/April 2017 - 31
O&MM Fabricator - March/April 2017 - Skilled Employment Practices
O&MM Fabricator - March/April 2017 - 33
O&MM Fabricator - March/April 2017 - 34
O&MM Fabricator - March/April 2017 - 35
O&MM Fabricator - March/April 2017 - Financing Acquisition Growth and Profits
O&MM Fabricator - March/April 2017 - 37
O&MM Fabricator - March/April 2017 - 38
O&MM Fabricator - March/April 2017 - 39
O&MM Fabricator - March/April 2017 - 40
O&MM Fabricator - March/April 2017 - Supplier Members
O&MM Fabricator - March/April 2017 - 42
O&MM Fabricator - March/April 2017 - New Nomma Members & Iron Club Members
O&MM Fabricator - March/April 2017 - People
O&MM Fabricator - March/April 2017 - 45
O&MM Fabricator - March/April 2017 - Products
O&MM Fabricator - March/April 2017 - 47
O&MM Fabricator - March/April 2017 - Gargantuan, Pet-Inspired Fountain Center Stage in Canadian Park
O&MM Fabricator - March/April 2017 - Index of Advertisers
O&MM Fabricator - March/April 2017 - 50
O&MM Fabricator - March/April 2017 - cover3
O&MM Fabricator - March/April 2017 - cover4
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