Monthly Archives: November 2019

1560 Ausberg Gorget Construction Notes

STILL IN DRAFT – latest update Nov 26, 2019

As part of the harness I am working on, I needed to construct a gorget. Most 15th century Milanese armour has a fairly large neck opening which is meant to accommodate a mail standard (mail neck defences) I would like to have the ability to use this as a combat harness, which means that I would like to have plate defences for my neck both from a “rules” point of view (because most armoured combat groups require rigid neck armour) and because I really like being able to use all of my limbs, and have taken a number of hits to my neck area which would have been concerning if I wasn’t generally armoured like a tank.

Wade Allen owns the nicest gorget I have handled (linked) so if I am going to use a non-period solution, I wanted to make the nicest one possible. Ironically, this type of armour could be seen as the ultimate development of milanese armour, since 17th century armour is very functional, with minimal fluting and integrates all of the components. To quote Wade and Mac (Robert Macpherson) “if you want to build a 17th century suit of armour, first build the gorget…”

Here’s a few pictures of the completed piece  – thanks to Dean for modelling:
Dean Modelling a 1560 gorget reproduction - BackDean Modelling a 1560 gorget reproduction - Front

Dean Modelling a 1560 gorget reproduction - Left sideDean Modelling a 1560 gorget reproduction - Right side

Overall construction methodology

The last time I built one of these, I used very thin stainless steel and the collar roll was minimal, with a 1/16″ copper wire rolled in. The actual gorget is a “jelly roll” of material sufficient to engage a helmet (probably a close helm, possibly an armet) so it needs a fairly substantial roll to engage this. John Cope did the “jelly roll” and it took him a considerable amount of time and a lot of working hot to accomplish it. For this attempt I am working in 0.050″ (18 gauge) carbon steel for the upper section and 0.625″ (16 gauge) for the front main plate. The steel used is 1050, which has slightly too much carbon for the use (medieval carbon steels of this period centered around 1040) but is still fairly close to the medieval material. To get a thicker neck roll I am tucking a 1/8″ welding rod into the roll, which was a bit more involved that I was expecting, but seems to have worked out. Since I have now done this “roll” in a number of ways, I have settled on doing the hinge after the roll is complete and the plates are rounded (discussion below). In general I find that starting from the “inside” of a piece and working out is the easiest way to proceed, so the overall construction methodology will follow that approach. Note that in the list below, the bolded sections are a considerable part of the work, with the work being roughly broken between the top neck plate (with roll and hinge), shaping the back plate with its’ deceptively challenging anticlastic curves, and “all the rest” being the remaining third of the work. The overall construction methodology will thus be:

  • Cutting the components
  • Building the top neck plate
  • Building the remaining neck plates
  • Rough shaping of the back plate
  • Rough shaping of the front plate
  • Blending the components
  • Building the top catch
  • Installing the leathers
  • Building the lower pivot and catch

I will not go into detail on cutting the components: I use a beverly shear to cut the pieces, and then flatten with a hammer on an anvil and deburr (clean up the sharp edges) with an autobody sander with 240 grit sandpaper. If you don’t have a sander, you may want to look into a “deburring wheel” for a grinder, since these are very soft / fine wheels that will not accidentally take a “bite” out of your work. The pattern (PDF) is linked below and includes the neck pattern (which is a big rectangle) for completeness.

Pattern Link for 1560’s Ausberg Gorget

Building the top neck plate

Overview of the top neck plate

As noted above, this part of the project is responsible for roughly 1/3 of the total effort in the piece, so expect that if you have done lots of armour before this will take a full day – more if you don’t have that experience.

For the top “ring” there are a number of interacting details that need to be remembered.

    1. The roll must be an outside roll, so the outside of the piece will not have a visible seam
    2. The front overlaps the back, and the roll is cut at a 30-45 degree angle to eliminate any seams that could be exploited
    3. the hinge is designed to open just enough to get your neck in, so the hinge joints are beveled – note that this means that if properly constructed, you cannot see daylight through the hinge
    4. As a result of the bevels, the back “roll” passes over the hinge, with an asymmetric joint on the hinge side
    5. On the non-hinge (catch) side the catch is positioned such that the catch is forward of the seam line – so the back plate must underlap forward of the centerline. this allows all of the lames to be in alignment with the seam joint in the upper ring

I’ll go into detail on these below (with pictures) but it means that when you are building this piece the top ring is asymmetric. On the hinge side the back will have an extra length of roll, while the front plate will have a gap for this roll to about 1/4″ – 1/2″ past the hinge location. On the catch side the front plate will define the line of articulation, and the back will need a “tab” to project forward roughly 1/2″ past the line of the roll. Knowing this ahead of construction (instead of fiddling around and THEN noticing it) will make your life much easier. Here are some reference photos to the original piece:

A210 closure side - closed A201 Closure side - closed

A201 Hinge side - open A201 Hinge side - closed

Photos of the insides are also quite instructive:

A210 inside Hinge Side A210 inside Closure Side

Note that all of these links are back to the original main page, clicking through there will provide high definition photos – including some additional photos that I requested to help in my construction (thanks Wade!)

For the roll, I started by running the flat sheet (24″ long x 2″ wide) through a bead roller to set a consistent start to the work. I have found that I get better results with shorter pieces, so the next generation version I used 2 pieces a bit over 12″ in length. Note that having extra length means you can trim it down at the end, but not having enough means that you get to redo the roll. This was important for my first piece, because I did the hinge on the wrong side which was a lot of wasted effort, and would have required me to build a new piece if I didn’t have the extra length.

The Bead roller First pass roll in bead roller

I used the bead roller for 2 reasons: the first is that it takes about 5 minutes to run a piece through the roller, and completes about 45 degrees of the roll. It also gives a bit of an offset or “push” out of the plane of the material (which I want for the outside roll) with the edge of this bead at roughly 1/2″ from the edge of the plate. For the completed version (shown above) I trimmed 1/4″ off this piece later, and then realized that for the second lamination to cover the locking mechanism the plate needed to be 1/4″ taller. For the version I am currently working on, I did not trim this, and it looks like I will have the correct amount of material (and the gorget will be 1/4″ taller overall). Regardless I would recommend “wasting” that 1/4″ since it’s easy to trim a little extra, but it is very hard to add an extra 1/8″ if you need it later. The roll itself uses slightly less than 1/2″ of this depth, and for my first attempt left a bit of void space in the roll. The current version I was very careful about tightening the roll. I then moved to my soft-jawed vice to push the roll over to about 135 degrees, which took another two passes. When I am doing a roll, I generally use a small (8 oz) domed hammer and make a lot of small overlapping strikes, so that the edge does not get at all “wavy”, as can be seen in the following photos:

Starting the second rolling pass Starting the second rolling pass
Completed the second (and third) rolling pass

Once this was rolled to about 135 degrees it was time to close the roll. While it is faster to do this closure on a solid surface (like an anvil face) if you make a mistake it will be on your piece forever, so I tend to do this into a wood stump, with slow even passes until I have just enough room to fit the reinforcing rod in. Note that the original used a “jelly roll”, rolling the metal roughly 2 1/2 times to get the thickness of the roll. This would have avoided rod slippage which I experienced (below) but is a significant amount more work.

Final Rolling passes Closing the roll - detail

Once the roll was closed, I needed to “push” the roll to the outside. While this would happen of its own accord while shaping the piece, I find it easier to control if this is done first, particularly if the gorget is meant to engage a helm, requiring as much symmetry as possible. To do this I secured it in my soft jawed vice and used a iece of hardwood (oak) as a striker, striking it with a large (2 to 4 lb) hammer.

Offsetting the roll

 

For the gorget lames and lower plate, there are a number of considerations to include, which will make construction easier

    1. the front lames line up exactly on the seam line
    2. The back underlaps the front plates, but this is a very small (1/2″ at most) overlap. This is possible because the top ring is a hard articulation and is always with a millimeter of position, and the bottom plates (that will interact with the cuirass) are also hard articulations and will remain within 1 mm when closed.
    3. The bottom plates are again the front over the back, with a slotted pivot rivet on the left and a locking (keyhole) closure on the right
    4. the easiest way to get the slot correct for the “hinge” side is to punch the hole for the pivot, and open the gorget while poking a sharpie through the hole. This will draw a curved line that describes the opening
    5. a similar approach can be used on the closure side, with the BACK plate being punched first, and drawing the arc on the front plate (on the inside)
    6. punch the “closed” position first for the closure, then use a larger punch for the “openng” position (the farther forward one) – you may be able to simply file out the channel if you use this approach.

Making Arming Nails

I just had a bunch of folks drop by my shop, and I realized that there are a lot of small fabrications that I take for granted – particularly my “consumables”. I thought that I should spend a bit of time to post how to make some of these, since it’s quite easy, and without the right components, your armour will end up looking more than a little funny. A lot of folks have realized that standard rivets are bad at making leather to metal connections for strapping and “soft” articulations (such as used in gorgets and pauldrons) and many people have used roofing nails as a much better solution than rivets and washers.

Unfortunately, for most leather attachments and particularly gorgets, the head of a roofing nail is too wide. It is also worth noting that roofing nails are often quite asymmetric, so making “precise” connections (again, critical for gorgets with integral hinges) is problematic. To solve this, I have a process for making “arming nails” that gives consistent results (and nice connectors) and takes about ~30 seconds per rivet. It should be noted that I tend to do a hundred or so at a time, and have a little container of these which I periodically refill when it gets empty. This prompted the question that triggered this article when I was working on a gorget “Where did you get those?”

A can of annealed nails Container of arming nails
I start with a lot of nails – the nails in the container are a few more than those in the small container on the right. The head size for these is about 5/16″ – roughly halfway between a standard 1/8″ rivet head (a flathead or truss 1/8″ rivet head will be 1/4″ diameter, round heads are slightly smaller) and the diameter of a standard roofing nail (generally about 3/8″). The container is from Lee valley – they sell a lot of useful containers:here is a direct link to all sizes of these containers

Suggested Materials

  • Roofing Nails
  • Bench grinder
  • Cordless Drill with adjustable (quick release) chuck
  • Fine (mill) file
  • Linesmans pliers (Milwakee brand preferred)

I’ll add some notes on the front end on these materials. I start with regular roofing nails and get them annealed (put in a forge to heat to ~1,500 degrees and cool slowly). I buy these as short as possible since they will be clipped to be just long enough to go through a piece of 18 Gauge material, a piece of leather  and have a bit of extra (about 1/8″) to pean over. You don’t need the quick release chuck, but if you don’t have this it will change your time from ~30 seconds per nail to several minutes per nail, and you will probably want to skip using the grinder. I also recommend Milwakee brand linesmans pliers, since these are the best so far (hands down) that I have found for easily clipping hundreds of 1/8″ chunks of steel. If I had these for my first Wisby coat of plates I could have used my hands the day after building it – but that’s another story.

Procedure

I start by using a grinder to rough off the additional head material – note that I point the top of the rivet in the direction the grinder is moving, so that all of the grinder burr is on the TOP of the rivet – this makes cleaning them up later easier. When I am making these I find that a 6 count (about 4 seconds) is an appropriate amount of time on the wheel. it is important to have the drill spinning when you make contact with the grinding wheel, and that it is still spinning when you leave contact with the wheel – if not, you will generally deform one side of the head. This is less of an issue if your nails are not annealed, but then cutting to length (and peaning) will be much more difficult. The majority of the time taken is getting the nail on and off the drill.

Rough Grinding of the arming nails A pile of rough arming nails next to the grinder

Once you have a pile of these grab a fine (mill) file and use it to clean the heads. Note that if you have any heads that “caught” the grinder wheel (generally because I stopped the drill while in contact with the grinder) these will pull a chunk of the head out of plane. I just throw these out, since cleaning them up takes longer than grinding a new one. when you file the head make sure that you file the top, or you will have rough flashing on the top, where it will be uncomfortable and abrade arming clothes (or the wearer) of the armour.

Good and Mangled rough ground nails Filing the rough ground nail clean

Note that the nail on the left is distorted on the left side, while the one on the right is fairly symmetric. they both have a slight bevel angle, which I find makes for a more comfortable fit. If your drill has a chuck, then I would either skip the grinder and use a coarse (bastard) file to remove stock, and then a mill file to smooth the final, or have a file next to the grinder so that you don’t have to rechuck the nail between operations.

One I have a nice pile of smooth nails, I trim them to size using a pair of linesmans pliers. my shaft is generally about 4mm (about 3/16″) but you should find the length that works best for you. You can trim as you assemble armour, but this requires a LOT more storage space, and another tool when you are doing the leather fitting.

Filing the course ground nails clean Start to finish - annealed nail, course ground, filed and trimmed arming nail

The last photo is a picture of what these look like from start to finish: The annealed nail, course ground nail, filed nail and trimmed to length. This underscores the volume, since the full length nail is about 5x the volume of the trimmed ones.