stealle Posted June 2, 2012 Share Posted June 2, 2012 I was wondering if any of you guys know exactly how many inch pounds Benelli recommends for tightening the screws on the M4 picatinny rail. Perhaps some think it is unnecessary to use a torque screwdriver. For one, I'd rather be safe than sorry. Second, I love tools! Also, I'd take a recommendation on a good torque screwdriver. Amazon dot com has a number of brands (Wheeler, Weever, Wiha, Neiko, etc.) at fairly reasonable prices. $50-$100 As much as I love tools, I can't see spending more than a $100 for this tool unless someone can convince me otherwise. Quote Link to comment Share on other sites More sharing options...
stealle Posted June 2, 2012 Author Share Posted June 2, 2012 Hmmm, I just looked at Brownells. They have the Magna-Tip torque handle. Might be worth the $120 since it comes with a lifetime guarantee. Anyone have/use this Brownells/Magna-tip model? Quote Link to comment Share on other sites More sharing options...
benelliwerkes Posted June 2, 2012 Share Posted June 2, 2012 (edited) The Wiha vario-torque is a good choice for installing gun grip screws and other gentle applications such as the Benelli rail; with multiple tips available, it is compatible with the Magna-Tip system. Installing the rail screws: 1. Remember the receiver is aluminum; it is easy to strip the threads with a steel screw, so make sure they are not cross-threaded; be gentle. 2. Use a dab of Blue Loctite on the screws, you only have ~ 2.5 mm of thread engagement available in the receiver. 3. Torque the screws to 8.5 INCH-pounds. 4. Use a proper size screw driver tip to avoid marring the screw slots. Edited June 2, 2012 by benelliwerkes Quote Link to comment Share on other sites More sharing options...
stealle Posted June 2, 2012 Author Share Posted June 2, 2012 Thanks benelliwerkes! Looks like you made your post at the same time I discovered this post from Kip. Seems the proper amount of tourque is a mystery. However, if you have success with 8.5 in/lbs then I don't see why they would need to be any tighter. Done deal.... Quote Link to comment Share on other sites More sharing options...
StrangerDanger Posted June 2, 2012 Share Posted June 2, 2012 The Brownells screw driver set Benelliwerks posted is awesome. I just got mine yesterday for Father's Day. I still haven't organized the bits properly though. That'll be an hour of my time. Quote Link to comment Share on other sites More sharing options...
benelliwerkes Posted June 2, 2012 Share Posted June 2, 2012 I would only add that if there is a disadvantage to the Magna-tip system, it is that there is always a few hundredths of "wiggle" between the inserted tip and the handle being used; when there is no room for wiggle room error, I like the fixed blade system or fabricate a hollow ground screwdriver to fit as needed. Quote Link to comment Share on other sites More sharing options...
stealle Posted June 2, 2012 Author Share Posted June 2, 2012 @benelliwerkes - according to the Brownells video I watched, the magna-tip system is 3/8". It appears your Wiha has a 1/4" to 3/8" adapter attached. Is that correct? Did it come with that adapter? It does not show that adapter on the amazon description. BTW, your pics give me a case of tool envy! @strangerdanger - did you get the brownells/magna-tip torque wrench/screwdriver with your set? Looks like it only cost $70 when you buy it with that massive set. Either way, nice Father's Day gift!!! Quote Link to comment Share on other sites More sharing options...
StrangerDanger Posted June 3, 2012 Share Posted June 3, 2012 I've read bad reviews about the torque wrench that Brownells has. So I didn't get it. I'd rather have the one Benelliwerkes has. I have the fixed blade set he listed as well. Got those last year for Father's Day. Quote Link to comment Share on other sites More sharing options...
Unobtanium Posted June 3, 2012 Share Posted June 3, 2012 A torque wrench is -+25% torque sensitivity. I wonder if screwdrivers are better? An experienced machinist manages -+30-35%. Quote Link to comment Share on other sites More sharing options...
The_Dude Posted June 3, 2012 Share Posted June 3, 2012 A torque wrench is -+25% torque sensitivity. I wonder if screwdrivers are better? An experienced machinist manages -+30-35%. What does that mean? Are you talking about actual accuracy? If your torque wrench is +- 25% you better throw it in the trash can. Typical accuracy 3 to 5 percent of indicated value. Quote Link to comment Share on other sites More sharing options...
Unobtanium Posted June 3, 2012 Share Posted June 3, 2012 What does that mean? Are you talking about actual accuracy? If your torque wrench is +- 25% you better throw it in the trash can. Typical accuracy 3 to 5 percent of indicated value. http://store.mettec.com/tech Quote Link to comment Share on other sites More sharing options...
The_Dude Posted June 3, 2012 Share Posted June 3, 2012 I think you may have misunderstood the page you quoted. Or you have not explained to me what it is you are implying. Torque wrenches are typically accurate at about 3 to 5 percent of indicated value. Again if your torque wrench is 25%, throw it in the trash can. Goto ANY torque mfg website and have a look at the specs. http://buy1.snapon.com/catalog/item.asp?P65=&tool=hand&item_ID=640960&group_ID=675227&store=&dir=catalog This is a QD series (pretty average) and is accurate to 4% clockwise and 6% counter clockwise. Quote Link to comment Share on other sites More sharing options...
Unobtanium Posted June 3, 2012 Share Posted June 3, 2012 I think you may have misunderstood the page you quoted. Or you have not explained to me what it is you are implying. Torque wrenches are typically accurate at about 3 to 5 percent of indicated value. Again if your torque wrench is 25%, throw it in the trash can. Goto ANY torque mfg website and have a look at the specs. http://buy1.snapon.com/catalog/item.asp?P65=&tool=hand&item_ID=640960&group_ID=675227&store=&dir=catalog This is a QD series (pretty average) and is accurate to 4% clockwise and 6% counter clockwise. Maybe I do not understand it. I thought 25% was a bit much, but it said it, and I went and verified it at the source. I normally don't use tq values, though, and do not profess to be a professional mechanic of mechanical things. Quote Link to comment Share on other sites More sharing options...
The_Dude Posted June 3, 2012 Share Posted June 3, 2012 Maybe I do not understand it. I thought 25% was a bit much, but it said it, and I went and verified it at the source. I normally don't use tq values, though, and do not profess to be a professional mechanic of mechanical things. No biggie. That page is confusing. Quote Link to comment Share on other sites More sharing options...
benelliwerkes Posted June 3, 2012 Share Posted June 3, 2012 These are the adapters I have for the Wiha, which is the 7.5-20 in/lb; the specifications are +/- 6 % accuracy. This is what I use for light applications e.g.grip screws for aluminum alloy Sig frames, custom 1911 grip screws etc......it seems everyone is always stripping their frame threads ! For heavier applications like scope mounting etc, I use the Weaver torque screwdriver or the digital 1/4" drive Snap-On. model. Quote Link to comment Share on other sites More sharing options...
benelliwerkes Posted June 3, 2012 Share Posted June 3, 2012 For heavier applications like scope mounting etc, I use the Weaver torque screwdriver or the digital 1/4" drive Snap-On. Quote Link to comment Share on other sites More sharing options...
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