Originally Posted by westcliffe01
Does Remington do anything different to the Sendero action compared to the 700 ? Watching videos of smiths accurizing the 700 action makes it clear that Remington does not even bother to cut the receiver threads using a threading tool in the lathe, even though the receiver starts off as a tube ??? Instead they use a tap which results in the threads being tapered and out of square. The the bolt engagement face is not square or flat (use of a worn "plunging tool" as opposed to a "proper cutting tool manipulated in 2 axis.) Its simply pitiful how something so simple just cannot be done properly in this age of $25k cnc lathes.
I get the impression that Remington is using equipment that is probably 30 or more years old (and now considerably more worn out) to make the 700 actions and they would benefit massively by re-tooling that line to use modern equipment that will build the quality back into the products. But, presumably, as long as people keep buying this sh**t, they will keep making it and change nothing.
Remington uses several Monarch VMC's to cut their actions with. It's just the way they set their processes up. Problem is that the Monarch is not that fantastic in machine alignments. Had they spent another $50K and bought the HMC, they could have tapped the threads very square (assuming they were using a good fixture; which they don't). Had Remington spent about $275K on a Hardingh CNC lathe, they could have cut everything within .001" compound error involved. They could have also bought Okumas (not as good)
There's more to retooling than just buying new equipment. They have to get into an accurate train of thought, and hire some folks that know a little bit about machine tool processes. They don't see to be interested in this. Plus they have no way to maintane their equipment, and their quality controll is even worse. They do zero gauge follow up and no gauge inspection to keep it right. Nobody knows how to realign a piece of CNC equipment, and if by slim chance it gets checked it only happens when they bite the bullet and bring in a service rep. When they finally bite the dust, the new owners will retool and things will get much better.
The comment about a tapped thread being tapered is not all that correct. If done right it can be very square. But a tap will always take the pathe of least resistence as it cuts thru the hole. Had they cut the bore on a CNC lathe or a good machine center, and then run a tap into that bore it would have easilly been within .001" with no taper in it. Very accurate threads that are cut with a tap are usually reamed first with a hole that starts out square and is strait and round. After that the rest is easy. But it's easier to do this with a single point tool when you cut the actuall reciever body. (only adds about 1.5 minutes to the process I might add)