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It is solid graphite. You can buy a piece here: https://www.mcmaster.com/#graphite/=1ecregv It machines easily. RWO

If you google "bolt handle threading jig", you will gets lots of hits with pics. RWO

My tail stock is about .003" high. If I extend the unlocked quill 2 or 3 inches, a small, sharp center drill, fed slowly, will cut a center with no run out in a smoothly faced work piece in the chuck. The rotating work piece tends to force the drill towards center and the quill's flexibility...

Shilen requires you cut off at least I" on both ends of a blank. Supposedly this is because that area is enlarged from the finishing lap's travel being reversed at each end. They claim to air gauge all bores, so that should reveal any other changes in dia. I recently received a 22 cal CF...

IMHO it is just another excuse to charge the customer more money. I wonder who "recommended" the slugging. I'm no pro, but I have used several barrels from Shilen and Krieger in my own rifles. I have never slugged one, but I have inspected all with a bore scope. All have been completely...

If you have enough time, MEK will eventually degrade cured epoxy, but it might take a week of immersion depending on how thick it is. Methylene Chloride will work faster, but is hard to find. This company makes solvents for commercial semiconductor disassembly, but I suspect it is quite...

amen rwo

PT&G makes one piece bolts for the 700. You can specify the bolt body dia. if you want a close fit. RWO

The bolt is essentially fully annealed when it comes out of the brazing furnace. It is heat treated afterwards. I'm guessing it is similar to 4140, so hardening temp is close to 1500 deg. F. This has no effect on the brazed joints and is why Remington uses the copper brazing alloy . RWO

According to Otteson, the bolt has 5 parts including the handle and they are all simultaneously furnace brazed together with copper alloy at about 2000 deg F. If the handle joint is done properly, it is almost as strong as welding. The joint is tested after brazing with a pneumatic press...

This one works very well: https://www.ellsworth.com/products/by-manufacturer/dow-corning/lubricant-products/silicone-paste/dow-corning-molykote-g-n-metal-assembly-paste-gray-80-g-tube/ I also use it to lube scroll chucks and BP draw-bar/collet threads. Doesn't run or gum up. Seems to last a...

3M makes great belts as well. As good as Norton in my experience. No other brands seem to last as long. I have never needed them, but apparently custom belts are readily available. Here is one supplier: http://customsandingbelts.com/ Google has lots more. RWO

Gun welding usually requires good cosmetics and small welds like bolt handles, pit filling, etc. You need a Tig machine that can hold a very low current arc for those delicate welds and elimination of the crater at arc cut-off. Miller makes a line called Maxstar that can go down to 1 amp...

Mcmaster.com has a huge selection of springs of all types and materials. No minimum order. RWO

There is nothing wrong with tapered lug faces and the slight decrease in headspace as the bolt is closed. The 1913/17 Enfield proved that long ago. In fact, they help reduce bolt opening effort as the bolt lugs lift off the receiver abutments as soon as the bolt begins to open, reducing...

I have one just like it, except for the external countershaft, bought new in 1987. If it is in good shape wear wise, it is a really good deal. Put a 2HP, 3-phase motor and VFD on it and you have a wonderful machine. RWO

There is no reason to go overboard with hardness or material specs. 17-4PH SS at condition 1025 is about RC 38 and machines nicely. 416 SS also machines well and can be heat-treated to similar hardness. There is no reason to use anything else in the SS spectrum. Definitely do not use 316...

I suspect the reason your local smiths don't work on factory barrels is that they would rather sell you a new barrel. The factories make barrels the same way the custom makers do except for those made by hammer forging. In any case, I have never seen a factory barrel that was more difficult...

I don't know what "code" you are talking about, because last time I checked the NEC does not require a safety switch between the VFD and motor. You do need a lockable, fused disconnect switch or circuit breaker upstream of the VFD. Any kind of switch between the motor and VFD is risking...

Edge works great: Go to http://saami.org/specifications_and_information/index.cfm?page=CC Scroll down to SAAMI/ANSI Standards and click on what you want to see. A PDF will download with everything in it. Look in table of contents to find your dwg. page #. RWO