What would be the safe limit for a reciever diameter if it was to accept 1.0" thread?
what is the depth of thread for that 1.o" thread?

quote:

Originally posted by Woodjack:
What would be the safe limit for a reciever diameter if it was to accept 1.0" thread?
what is the depth of thread for that 1.0" thread?

this aint a lecture, just facts

after one decides if it's square, whitworth, or V singlepoint threads, and which angle (60 is the most common in the english speaking world) threads are defined by ID/OD, major,cord (or pitch) and minor diameters and then the depth (height) based off thread count)

since a receiver is an ID in this question, you just look at the OD end of the thread...

a 1" threaded barrel shank coming into a threaded ID will have what as it's largest (therefore the receivers max "depth") if just shy of 1"...

here's why..
a 1"x12 barrel will have a major of about .9975 (assuming class 2 fit) and a minor around .95 (not doing math this early, dang it)

so the depth (max cut in the rec) will be about 1.0" and the opening will be about .9525

I won't even presume to tell you what a safe wall thickness is.

jeffe

My Ruger 77 is great example of a one inch
thread in an action that is strong enough
to hold big overloads. Thread length is .7
inches, reciever ring is 1.32 inches at smallest
diameter.These would be good minimums to
go by.. Ed

The thread depth is usually pitch/2. The "tap drill" or hole before threading is usually the theoretical major dia. minus the pitch. Example: 1-16 (inch), subtract 1/16" from 1" = .937. Metric threads are much easier, example: 6 X 1 uses a 5mm tap drill.

For the answer to your question of minimum receiver wall, I'd suggest that you ask that question on a board where more engineers and metallurgists hang out. Most receivers are larger in dia. than needed to accomidate the bolt raceways, provide a shoulder for the barrel to press against, etc. Opinion, not fact based.

The barrel stub holds the chamber pressure. the reciever holds the bolt and barrel together, and transfers the recoil to the stock. The receiver nust be "stiff enough " to hold the barrel in alignment witrh the receiver.
Good Luck!

If all that ain't confusing enough, what really matters is the hoop strength of the threaded shank and that will vary not only with major/minor thread diameter but also cartridge diameter at the shank plus brass strength.

So your 1" barrel thread will contain different pressures with different diameter cartridges and/or cases, meaning you could have a variety of reciever ring dimensions and still be safe for for different rounds. That's obviously a nanufacturing nightmare so everyone has a fixed size to cover all bases.