Over in Germany I've seen the 1/4", 1/2" and 3/4" ratchets referred in store dispays to as 6, 13 and 19 mm ratchets. I'm not at home to measure one but a tolerance of 0,5 mm is fine for the size of a ratchet.
Mike Payne On 30/08/2011, at 20:41 , Kilopascal wrote: > I can see where using inch trade names for the ratchet handles can lead to > confusion. One way to solve the problem is not to use a number designation > at all. Since there are only three sizes with dimensions of 6.5 mm, 9.5 mm > and 12.5 mm, they can be referred to as small, medium and large. > > If you must call them by a dimensional trade name, use the metric numbers of > 6.5, 9.5 and 12.5. > > One thing I like about the Chinese, they aren't hung up on exact conversions > from USC. They do a hell of a lot of sensible rounding. This makes everyone > happy. The Americans still think they are getting a real inch product. The > Chinese round everything to a round metric size before manufacturing and the > American consumer is totally unaware. > > Having the Chinese build American products assures the products are properly > metricated to rounded sizes. > > > > > [USMA:51044] Re: US should weigh up one vital change > > John M. Steele > Tue, 30 Aug 2011 12:26:36 -0700 > > I believe he is referring to the rachet handles (the square drive dimension > that the sockets connect onto) and not the bolts that the sockets fit. > > --- On Tue, 8/30/11, Michael Payne <[email protected]> wrote: > > > From: Michael Payne <[email protected]> > Subject: [USMA:51043] Re: US should weigh up one vital change > To: "U.S. Metric Association" <[email protected]> > Date: Tuesday, August 30, 2011, 3:01 PM > > > A 1/4 and a 3/8 you might need, but the 1/2 is so close to 13 mm it should > not > matter. Turns out the 10 mm and 13 mm are quite common bolt/nut sizes. The 10 > mm will fit a 3/8 bolt but might be a bit loose. > > The 1/4 inch used to be a common appliance size bolt, but now they are all > made > in China or Korea the 1/4 will not fit anymore. > > Mike Payne > > On 29/08/2011, at 15:39 , [email protected] wrote: > > > China is defiantly benefitting from our ignorance, if you have a Harbor > > Freight store in for area, you would know it is 100% China made products, I > > am defiantly boycotting this store, they sale mostly 'English' tools, no > > Metric drills of any sort, and some Metric tool sets. People think they are > > saving money there, but you are buying two sets of tools. No thanks, no > > more > > Imperial tools for me, but still need to buy 1/4, 3/8, 1/2 socket set as I > > do > > not know of any Metric versions. > > > > > > Bruce E. Arkwright, Jr > > Erie PA > > Linux and Metric User and Enforcer > > > > > > I will only invest in nukes that are 150 gigameters away. How much solar > > energy have you collected today? > > Id put my money on the sun and solar energy. What a source of power! I hope > > we dont have to wait til oil and coal run out before we tackle that. I wish > > I > > had a few more years left. -- Thomas Edison♽☯♑ > > >
