The Accurate Reloading Forums THE ACCURATE RELOADING.COM FORUMS Guns, Politics, Gunsmithing & Reloading Gunsmithing What is an integral rib?Go | New | Find | Notify | Tools | Reply | |
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"Granite Mountain Arms, also offers .375, .416, .458 and .505 barrels with integral barrel ribs, either as components or fitted to his actions" Does this mean they are welded on rather than screwed? ****************************************************************** R. Lee Ermey: "The deadliest weapon in the world is a Marine and his rifle." ****************************************************************** We're going to be "gifted" with a health care plan we are forced to purchase and fined if we don't, Which purportedly covers at least ten million more people, without adding a single new doctor, but provides for 16,000 new IRS agents, written by a committee whose chairman says he doesn't understand it, passed by a Congress that didn't read it but exempted themselves from it, and signed by a President, with funding administered by a treasury chief who didn't pay his taxes, for which we'll be taxed for four years before any benefits take effect, by a government which has already bankrupted Social Security and Medicare, all to be overseen by a surgeon general who is obese, and financed by a country that's broke!!!!! 'What the hell could possibly go wrong?' | ||
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What the term means to Granite Mt Arms, I have no idea, but what “integral†means to me is that the rib is a machined part of the barrel and not a “add-on.†| |||
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Ditto. If a rib is described as "integral" it better not be a separate piece attached by any means. That is not to say that a well done "fitted" rib is not as difficult to produce. "Experience" is the only class you take where the exam comes before the lesson. | |||
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it means expensive, in that is machined from an oversized blank and not attached. | |||
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On top is a RSM 458 Lott with integral rib. Below is #1 458 Lott with attached rib. You can see the gap on the #1 if you look close.  Semper Fi WE BAND OF BUBBAS STC Hunting Club | |||
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a "rib" is generally meant to be a quarter rib.. quarter rib means it's roughly 1/4 the length of the barrel... most modern ribs are actually machined to fit the profile of the barrel and then stuck on. intergal means it's machined directly from the basic straight barrel as a single piece. thi$ $econd type is very ex$pen$ive a dakota add on rib is like 90 bucks... an interal rib barrel is more like 2k jeffe opinions vary band of bubbas and STC hunting Club Information on Ammoguide about the416AR, 458AR, 470AR, 500AR What is an AR round? Case Drawings 416-458-470AR and 500AR. 476AR, http://www.weaponsmith.com | |||
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Jeffeosso, Have you been making ribs? I was think about setting up my mill to do a reverse panatograph if you will to exact match the contours. Just curious if you have fiddled with this? | |||
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Mark Stratton recently published a book called Tricks of the Trade: Custom Rifle Metalsmithing (A Guide to Tools, Fixtures & Machine Setups). He was selling them last spring for $75.00. The book will save you about five years worth of grief (I'm not a machinist and don't really know, but it sounds good). His website is http://www.gunmaker.net LD  | |||
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When I read this thread, I took it to mean an integral rib like the Germans made for their sporting rifles back in the 20's & 30's. Mauser made a half round barrel (half octagon, half round) with a full length integral rib. In the rib they would mount an express sight and at the muzzle the rib turned into a front sight. I have had customers who have wanted me to machine replacement barrels for these old classic rifles, but when I bring up the cost they usually decline. If you have one of these rifles that have been shot out, you might consider having them rebored to a larger caliber and cartridge. Mauser most likely had a production line of machines making these barrels. I sure would like to see it just to look at the machines and tooling envolved. It would be very interesting. My book is still available, MACHINIST WORKSHOP did a review of it in thew 2005 June/July issue. I'm been keeping the printer busy. | |||
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schromf, by "Reverse pantograph" are you meaning that you have a two head (tracer-type) or that you want to use a digitizer form cnc, or have a dro and want to take "contact readings" off the barrel, then run it back? in any event, a digitizer is even more bucks than an intregal rib.. for the first one!! Mark, I have always thought mauser HAD to have used either a shaper or planer to cut the full ribs on round barrels.. but how to handle flex! I may need a signed copy of your book!!! if it will save the normal guy 5 years, it'll save this block head 10!!!! jeffe opinions vary band of bubbas and STC hunting Club Information on Ammoguide about the416AR, 458AR, 470AR, 500AR What is an AR round? Case Drawings 416-458-470AR and 500AR. 476AR, http://www.weaponsmith.com | |||
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In the new Rifle Shooter there are photos of two rifles, one of which has this Integral Quarter Rib and Front sight.....Hard to believe these were made out of the same chunk of steel as the barrel. Is this overkill for a rifle? How common is it for a quarter rib to come loose? ****************************************************************** R. Lee Ermey: "The deadliest weapon in the world is a Marine and his rifle." ****************************************************************** We're going to be "gifted" with a health care plan we are forced to purchase and fined if we don't, Which purportedly covers at least ten million more people, without adding a single new doctor, but provides for 16,000 new IRS agents, written by a committee whose chairman says he doesn't understand it, passed by a Congress that didn't read it but exempted themselves from it, and signed by a President, with funding administered by a treasury chief who didn't pay his taxes, for which we'll be taxed for four years before any benefits take effect, by a government which has already bankrupted Social Security and Medicare, all to be overseen by a surgeon general who is obese, and financed by a country that's broke!!!!! 'What the hell could possibly go wrong?' | |||
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A few years ago Searcy offered an integral ribbed barrel. I do not know if they still do? Rusty We Band of Brothers! DRSS, NRA & SCI Life Member "I am rejoiced at my fate. Do not be uneasy about me, for I am with my friends." ----- David Crockett in his last letter (to his children), January 9th, 1836 "I will never forsake Texas and her cause. I am her son." ----- Jose Antonio Navarro, from Mexican Prison in 1841 "for I have sworn upon the altar of god eternal hostility against every form of tyranny over the mind of man." Thomas Jefferson Declaration of Arbroath April 6, 1320-“. . .It is not for glory, nor riches, nor honours that we are fighting, but for freedom - for that alone, which no honest man gives up but with life itself.” | |||
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Jeffeosso, Well the CNC option wasn't what I was thinking about, my pocket hurts just thing about that ( ouch). I was thinking of the two head tracer method, using the barrel as the guide. I think your on the right tack about the shaper, another thought would be a horizontal mill. The half actogon, half round barrels that would work well on I am pretty sure. Given the era these were commonly manufactured shapers were a pretty common piece of machinery then. I got a tip from a reliable source to dig through the American Machinist and Machinery Archives and that they did some arcticles on this. Its a research project on my part, and I I will need to follow through on this when I get the time. An accurate listing of the machinery on the floor would glint some information on this, even if it doesn't go into details of the fixtures for operations. | |||
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schromf, Mark's book has a good way to do the rib using the mill as a pantagraph. I had a set up I could have photographed but it has gone to Scroll Cutter. Basically you have two channels and you glass the barrel and action upside down on one side and use it for the "pattern" to cut the raw steel on the other. You use a bungy cord to get a down feed pressure on the cutting tool as it cuts in the "X". | |||
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Customstox, I had an idea of using a worm gear to do the down pressure, and do a mirror off the barrel. It wouldn't suprise me I am overly complicating this, but in essence reference high, cut low using the barrel. And no I don't have it drawn up yet, but can see it in my head. | |||
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The quarter rib mating fixture work really slick. Basiclly your turning your Bridgeport type milling milling machine into a pantagraph. There is a stylist mounted on the machine's quill. The main fixture is a vice to hold the quarter rib material, and parallel to the vice is a pair of V-blocks that hold the barreled action in position while you make a pattern. The process is kind of like glass bedding only I use J B Weld as a potting material. The J B Weld forms a negative of the barreled action. You use the pattern to cut the under side of the rib. Once you have the fixture, to do the next rib, just mill out the former pattern and create a new one. All of the drawings for the fixture are in the book along with an explaination on how to use it. | |||
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I have said this on here before...but since I have such a fondness for repeating myself, repeating myself, I’ll say it again, again!  Mark’s book is worth twice the price just for the detailed drawings and specs on the tooling/fixtures/jigs in there. Great book, and should be required reading for anyone interested in gun work. | |||
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Exactly how I was thinking, only I was thinking like our mates down under, reference from the bottom on a non integrated, and from the top on a integrated, same jig/fixture for both type parts. Mark, sound like you book needs to be an addition in my reference library. I was figuring this out in my head, and before I drop a dime on my method I would like to see how its already being done. | |||
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I've sold a lot of these books and the only thing I hear from the buyers is, "When is Volume II Coming Out? I'm working on it guys... | |||
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I disagree. I have Mark's book, and for anyone wanting to do metalwork its probably worth 100 times the price!!!!! | |||
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22WRF, Well.....I don’t know if I’d pay that much for it! | |||
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