Threads Per Inch

[lukegilly13]

Does anyone know the TPI's for orginal .69 cal m42 musket ramrods or original accessories such as worms, ball pullers, etc? Reason for asking....i'm looking to fit a worm to my ramrod. I have had the following recommendations:
1. Get a die and cut the ramrod to fit the Euroarms attachments
2. Buy an original worm and tap it
3. An original should fit the the rammer because AS sells the smoothbore ramrod with threads the same size as the originals. Anyone been down this road before?

[Minieball577]

Re: Threads Per Inch

I have threaded an original m1841 rifle ball puller to an armi sport m1842 rod with success in pulling the lodged ball. Originals might fit.

I personally would avoid rethreading an original tool.

[Curt Schmidt]

Re: Threads Per Inch

Hallo!

The U.S. copied the French metric system starting about 1795 and running through the M1873 Trapdoors in 1890.

I have redone tools to the modern Metric as I have never found dies and taps that could match the pitch width.

(Typically, U.S. screw sizes vary between 6mm X 1.5 pitch, 6 X 1.1, 6mm X 1, 5mm X .9, or 5mm X 1.)

Curt

[Clark Badgett]

Re: Threads Per Inch

(Typically, U.S. screw sizes vary between 6mm X 1.5 pitch, 6 X 1.1, 6mm X 1, 5mm X .9, or 5mm X 1.)

Wow, only one of those is in the current standard. I still stand amazed that back during the founding and early days of our nation with all the anti-English sentiment that we didn't dive head first into the Metric system like Jefferson suggested.

[ndnchf]

Re: Threads Per Inch

Original .69 worms are readily available from multiple sources. I bought one and then called Lodgwood and ordered a new one piece ramrod for my Armisport '42 and ditched the Armisport 2 piece brazed rod. I specified the new rod should have original threads. It works fine with the original worm. If I ever have to pull a ball, I don't have to worry about the 2 piece rod seperating.

Steve Blancard
13 Va Co. A

[lukegilly13]

Re: Threads Per Inch

To further the discussion, I am entertaining using a die to cut new threads into the rammer of my '42 so that I can use the same "kit" that I use with my '61. Does anyone know for sure the thread size/pattern of a Euroarms 1861 springfield? When I measured I got 10-32tpi. but before I go to turning my other rammer I want to make sure.

[Curt Schmidt]

Re: Threads Per Inch

Hallo!

The current generation of EuroArms uses 10-32 UTS (Unified Thread Standard) based on the inch rather than the millimeter- for the ramrod threading instead of everything else which is ISO metric screw thread.

They have the same 60 degree profile as the ISO metric, and depending upon the pitch/coarseness some of the ISO stuff can engage enough of UTS, and vice versa, sometimes to gain purchase but not a securely threaded screw. (Not suggested or recommended.)

I have lost track of the various Armi Sport and Euro Arms changes over the past four decades other than they are not always the same.

Curt

[lukegilly13]

Re: Threads Per Inch

To follow up on the post....
Being the OCD person that I am I also called the manufacturer (Euroarms) about the thread size for my 1861 Springfield. They confirmed what Curt said...that it was a 10-32. So, I went to the local hardware store and purchased a 10-32 die. Before I cut the '42 rammer I decided to check it again first so I tapped a nut with the tap that came with the 10-32 die and attempted to screw it onto the '61 rammer. It did not work! Thank goodness I checked it! So, I took the rammer back into the hardware store to have the threads gauged by a professional. It was an M5-.8. My M5-.8 die should be here monday afternoon.
Therefore, in case you think you might ever come across this: If you own a Euroarms 1861 Springfield, before you buy a worm/brush/bore scrubber/etc, check your thread pattern. Mine was an M5-.8, others are a 10-32 standard!

[Clark Badgett]

Re: Threads Per Inch

It was an 8-.5mm. My 8-.5mm die should be here monday afternoon.

I think you mean M5x.8. :wink_smil 8mm would be one heavy rammer.

[Charles Heath]

Re: Threads Per Inch

Does anyone know the TPI's for orginal .69 cal m42 musket ramrods or original accessories such as worms, ball pullers, etc? Reason for asking....i'm looking to fit a worm to my ramrod.

Luke,

Taking into account that you want an original wiper, the fact of the matter is the repop .69 caliber wipers are one of the most common vendor items, why not take a few moments to try one of those on the threaded end of your rammer before modifying original items? As far as repops go, they aren't all that bad.

[lukegilly13]

Re: Threads Per Inch

Clark,
Thanks for the correction, you are right! I should never post in a hurry haha.

Charles,
You are right as well...I have looked at several .69cal wipers. The problem is, I don't WANT to alter the original that didn't fit. I considered altering the repop ramrod to fit the original worm. However, the original worm had a larger shank diameter than the rammer. So, after talking to several vendors, we did not believe the repro worm would fit the rammer either...so I decided to alter the rammer to fit the repro worm I already have.