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Picture of Design and Build an English Wheel
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An english wheel is a classic hand-powered shop tool for making two-dimensional curves in sheet metal.  Its used for making aircraft skins, car body parts, suits of armor and other applications where a smooth surface on the sheet is desired, something extremely difficult to achieve with a hammer.  It is also very useful for planishing; smoothing dimpled or bumpy sheet metal after hammering.

An english wheel seemed like an excellent tool to build.  I read up on the theory of operation to get an idea of how it worked, looked at some pictures of wheels on the internet, and I set forth to design and build it.  The whole process only took two weeks, start to finish.

It works by stretching the small strip of material that comes in contact with both wheels as it is passed repeatedly between them.  This stretching results in the material developing a curvature after many repeated passes.  Rolling in different directions and angled results in different effects.  You can see the results of my first test sheet, and all I had to go by was what I picked up from a couple of videos I saw on Youtube.

This instructable will be a rough-over of how to do most of the work, highlighting some insights I picked up along the way.  You can scale the design ideas to make a benchtop model or a larger floorstanding version.  The only thing that changes is the size of the "C" shape body, and the length of the adjustment screw, to accommodate larger work pieces.


 
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Step 1: Design

The design is quite simple.  The two wheels run against each other and the material is worked between them, with weight from the top one pressing down and pressure applied by the screw mechanism pressing the bottom one up, the sheet metal between is slowly thinned and curved. 

I've made drawings of all the complex parts for the project.  The ones not shown are just simple cut lengths of a standard size material (square tube, rod, etc) so a 2D drawing wouldn't be of any more help than just a written length.  The PDF attached to this step is the design for the overall machine, showing the main lengths and their arrangement.  I uploaded it as a PDF because the numbers and details are invisible as an image.  The screw in red is just to show how it passes up through the bottom to allow adjustment.

I didn't have the material or lathe capability to make a 8" diameter disk for use as the top anvil, so I recommend purchasing one online or at Harbor Freight.  A gigantic bearing would suffice, if you can find/get one.  The bottom anvil is a curved bearing from a pillow block, these are perfect for this application because they are hardened and also run perfectly smooth and straight even if they are mounted off-center.

A bit about tools: Without welding, a mill or lathe, this project will be every difficult.  Keep in mind that is project is designed for someone with access to machine tools.   They don't need to be fancy, but they are virtually required to complete this project.

The following list correlates to the drawings below, and the quantities of each part you will need to make, and what material to make them out of.
  •  Guide rings (2)  - 3/4" steel plate
  • Pipe end cap (2) - 1/8" steel plate
  • Lower anvil holder base (1) - 1/4" steel plate
  • Gusset (4) - 1/8" steel plate
  • Clamp/mounting bracket (4) - 3/16" steel angle
  • Top anvil mounts (1) - 1/8" steel plate
  • Threaded rod guide (1) - 3/4" steel plate
  • Lower anvil holder side (2) - 1/4" steel plate
  • Guide rod plate (1) - 1/4" steel plate
  • Lower anvil pin (1) - 1/2" steel rod
  • Anvil holder guide housing (1) 2" steel square tube
  • Two bushings for the top and bottom anvils.  These will depend on what you are using for anvils.  They just need to be adapted for the holders.

In addition to these, you will also need to cut the following lengths of material:
  • 9-1/2" length of 3/4" diameter threaded rod
  • 4" length of 1-1/4" diameter steel pipe
  • 2" length 1/2" solid rod
  • 24", 26.75" and 26" lengths of 2" square tube, 1/8" thick wall

Hardware:
  • 5x 3-1/2" long 1/2" bolts
  • 5x 1/2" nuts
  • 5x 1/2" lock washers
  • 9x 1/2" washers
  • 4x 8-32 1/2" flat head screws

Step 2: Lower Anvil and Holder

The lower anvil in my project is a pillow block bearing, which has a curved outer edge perfect for this application.  The anvil is held on a pin which is placed on a U-shaped holder made of 1/4" steel plate.  This holder is welded to a 4" long steel pipe.  The other end is connected to another small plate with a rod welded to the bottom of it.  This rod, along with the two guide rings at the top, allow this entire assembly to move up and down inside the guide housing when the handle is turned.

At the bottom of the guide housing there is the threaded rod guide.  This plate with a 3/4" threaded hole in it is the only part that holds the adjustment rod.   The adjustment rod presses directly against the guide rod that is connected to the moving assembly.

Step 3: Top Anvil Mounts

Picture of Top Anvil Mounts
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The top anvil is attached to the frame with two pieces made from 1/8" plate.  The anvil I purchased came with bearings that required a 3/4" rod, so I turned a bushing to allow me to use the 1/2" bolts that I had.  I put washers between the mounts and the anvil.  When welding the mounts to the end of the frame, I took the wheel off and bolted the bushing in place so that they would be correctly spaced and lined up.

Step 4: The Frame

Picture of The Frame
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This step is just welding all the tube segments, mounting pieces, and gussets together.  You can use your preferred welding style, I used MIG since I am best with it.  The bottom tube length needs holes drilled through it for the 1/2" bolts that hold the mounting brackets on.  You can see them in the picture below. 

What you can't see is the other 1" hole drilled through the bottom tube beneath the lower anvil guide housing at the bottom right corner of the frame.  This is a hole for the 3/4" threaded rod to pass through from the handle to the anvil holder that it has to move.

In order for everything to line up it is important that the frame is welded straight.  If the cuts on the ends of the square tubes are not straight, then the tubes should be clamped and tacked in place at the correct angle and the gap filled with weld.  Using a carpenter's square is a definite must.  It is also important that the correct tube ends are placed against the correct tube sides or else the two wheels won't line up.

If there is an issue with alignment, one way to iron out any inaccuracies is to weld the three main tube lengths, then mock everything up and find the right place to put the anvil holder guide housing below the top anvil, and tack it in place.  Remove everything that you mocked up and complete the remaining welds and gusset welds.

Pipe end caps cover the top-left and bottom-right pipe openings. I left the bottom-left opening uncapped since it will be facing the table, and the top anvil holder covers the top-right pipe opening.  The gussets are welded into the inside of each of the four corners to increase rigidity in the frame.

The mounting brackets are drilled with a 1/2" hole to match the holes through the bottom of the frame.

Step 5: Paint and Assembly

Picture of Paint and Assembly
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Since this whole project is made of steel, its a good idea to paint it so it doesn't rust.  You'll want to clean the welds using a wire brush to get the soot and scale off, and grind off the splatter if you care how it looks. Getting rid of sharp edges on the welds and cuts is definitely a good idea.

Assembly is pretty self-explanatory.  Be sure to use lock washers for the mounting brackets otherwise they might come loose, and this thing is pretty top-heavy.  Once the lower anvil holder assembly is in place the guide rings can be screwed into place with the 8-32 screws.

Step 6: Operation

How to use: simply hold the material and push it back and forth between the rollers.  You can push down on the sheet while you roll to control how quickly the process goes, but the bends in the material will be smoother if you take your time.  Please keep in mind when looking at the pictures below that I have never used one of these machines before, I had no clue what I was doing!  I was totally winging it but it turned out pretty good for a first time, I feel.

Step 7: Complete!

Picture of Complete!
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My machine is designed to be clamped down (instead of bolted) since I need to be able to move it around and off of the workbench.  If you want to bolt yours down, simply drill some additional holes in the mounting brackets to bolt to the table with. 

Thanks for reading and if you have any questions please let me know.

I made one very similar to this several years ago for forming motorcycle fuel tanks. I went a slightly different direction though, and put the adjustment screw on the large anvil on top, and put the small anvil in a V-block in the bottom leg. This allowed me to get inside the fuel tank shell and smooth out the hammer marks and die stretch marks that are impossible with the normal English wheel design. This also makes repeatable tension settings a breeze, since I put gradations on the adjuster wheel and the frame body. . .
StretchCT2 years ago
thanks for this, its next on my 'to do' list now
I like that lower anvil, would be great for doing skinny bike fenders, mine are a tad too wide.
excellent
abstracted3 years ago
a great top anvil "donor" might be a wheel frm scaffolding. not to critique toooooo much, but your top anvil braces seem a tad weak, but awesome. i wanna make a replica of a vintage brass deep sea diving helmet....this might be just what i need.
mattthegamer463 (author)  abstracted3 years ago
I was thinking that too, but I tested it out and found it didn't need any reinforcement. The forces on that area are pretty straight vertical, so the thin material seems to do alright. The gusset on the inside of that corner helps a lot too.
khansencan3 years ago
excellent ible! This belongs in the 1% of what Instructables is about. A gem amongst so much uninteresting stuff (adhering to the "be nice" policy).
What is the weight of the top roller?
What thickness of steel sheet can it handle?
mattthegamer463 (author)  khansencan3 years ago
Thanks! I haven't tested any high gauges, but I would guess that a patient man might be able to do 16 gauge (59th, 1.5mm). I haven't tested it above about 20 gauge (35th, 7/8mm)

The wheel weighs 21 lbs. 8" diameter, 2" wide.
knife1413 years ago
Great job!! I've looked at floor mounted English wheels before, but couldn't afford the shop space for such a beast. I like the fact that yours can be bolted to a workbench, then removed if the space is needed for something else. I may have to build one of these. Thanks for posting this.
pfred2 knife1413 years ago
That is what caught my eye with this one. All the English Wheels I've ever seen have been large self standing ones.
A very nice design... and if you were going to a slightly smaller scale(or had a massive heavy vice) you could weld a piece of plate along the bottom, and clamp it in a vice!
This is the biggest vise I have:

http://www.instructables.com/id/Make-a-Tripod-Vise-Stand/

I can pick the whole thing up and move it around, but it stays put pretty good on its own too.
mattthegamer463 (author)  pfred23 years ago
From what I've learned here, I bet one could be made from a C-clamp and used for small brass and aluminum sheets and the like.
The throat depth would limit the size pieces that could be worked though. The only real use I could put an English Wheel to would be automotive body work. Anymore I've been taking a car of the future mentality there anyways, with Bondo and fiberglass.
mattthegamer463 (author)  pfred23 years ago
Yes of course. If you were doing jewelery or some kind of trinket-making a C-clamp sized version could be useful.
I guess so. Jewelery and trinket making aren't anything I'd do though. Nothing wrong with it for those with aptitude and interest, but I'm afraid I've neither unless I can divine a purpose. Sounds like nut house therapy to me if I'm going to be completely honest. I'm a bit twisted, but I ain't that far gone yet!
knife141 pfred23 years ago
+1 on the nut house therapy....
pfred2 knife1413 years ago
the day I wake up and find myself at a long table stringing beaded bracelets along with a bunch of other slack jawed inmates is the day I really start to worry!
mattthegamer463 (author)  knife1413 years ago
No problem. I had some of the stuff lying around so mine cost about $120. Full parts cost would probably be $140 tops.
Nice job !! If I can add a thought, if you were to make the wheels & their mounts, removable you could attach an air hammer & anvil to the frame to make a power hammer,two tools in the space of one...
mattthegamer463 (author)  Lectric Wizard3 years ago
Certainly. Might need some reinforcement, and the top anvil mount would have to be beefed up from 1/8" plate.
Hawkeye_bkj3 years ago
What gauge of steel are you able to work with?
heathbar643 years ago
I was thinking maybe two steel or iron caster wheels would work. Does that sound feasible? How much pressure is between the wheels? I always imagined that it would have to be considerable, but you talk about the weight doing it.
mattthegamer463 (author)  heathbar643 years ago
I don't think the pressure is immense. Castor wheels sound like a great idea. It is important that the lower one is small and has rounded edges, however, or else it will be very hard to get a convex curve. The material contact point between the two wheels should be very small, only a single point, not a line.
Phil B3 years ago
Nicely done.

You can buy a commercially made benchtop English wheel from Metalcraft Tools in Crossville, Tennessee. They even have hands-on courses for those who wish to learn to use an English wheel. You can also buy the upper and lower anvils. The lower anvils come in a set with several styles.

My son-in-law does auto body work. One word of caution I learned from him is that it is very easy to run your thumb or fingers into the wheels, which is an experience you will never forget.
mattthegamer463 (author)  Phil B3 years ago
Yes, I should look into what I would imagine to be steel-toe boots for your fingertips! Not a bad idea, there.
CementTruck3 years ago
Do either of the wheels have a convex shape? I couldn't tell by the photos. I always thought it was necessary to achieve the complex shapes.

Great idea! Kudos.
mattthegamer463 (author)  CementTruck3 years ago
The bottom wheel has a convex shape, yes. Thats important otherwise the material will not easily take on a convex shape itself. The top wheel is flat, but I do not see a reason why it couldn't be convex too.
If both wheels were convex you could transition from a downward curve to an upward without flipping the piece around.

On another note, you could get a machinist to tweak 2 wheels for you; one with a groove and another one with the exact opposite. You could make creases in floppy metal to add rigidity. Your english wheel just became a multitasker. ;)
mattthegamer463 (author)  CementTruck3 years ago
Yep, different wheels for different tasks makes it pretty darn versatile.
colin3533 years ago
Astoundingly magnificent work, sir. I fear that you have become craftsmanship personified.
rimar20003 years ago
This tool seems very useful. What if I use two bearings of same size?

I think can't get that big steel wheel.
mattthegamer463 (author)  rimar20003 years ago
I think it should work... The large weight helps, however. I think if you had to use a smaller one you might need to reinforce the frame to prevent any flexing. You can always add additional reinforcement if it doesn't work.

Thanks for the patch :)