Guest Taco Posted June 2, 2009 Share Posted June 2, 2009 We need some bolts.Its 10x15 UNC.Here a pic:Here in Europe its difficult to find some, can someone help us with 4 or 5 bolts?Taco. Link to comment Share on other sites More sharing options...
Guest simplyconnected Posted June 3, 2009 Share Posted June 3, 2009 Looks like a socket head cap screw. Could you lay a scale next to it and take a picture? It's hard to put this in proportion without a reference.How long is the bolt? It looks like it could be a #10-24 X 1/2" or a 1/4"-20 X 3/4" Link to comment Share on other sites More sharing options...
Guest Taco Posted June 4, 2009 Share Posted June 4, 2009 Yes, it's a socket head cap screw.Well, here it is:Measerments:Total lenght: 26/32 inch.'lenght' of threat: 15,7 mm. (5/8 inch) Diameter: 4,7 mm.13 'rounds' of threat.I bought some 10-32 x 1/2" and 10-32 x 3/4" bolts, but they are wrong.Taco. Link to comment Share on other sites More sharing options...
Larry Schramm Posted June 4, 2009 Share Posted June 4, 2009 Taco,Send me a pm and I will see if I can help you. Link to comment Share on other sites More sharing options...
Guest boettger Posted June 4, 2009 Share Posted June 4, 2009 Taco,Your count of 13 threads over the 5/8 inch length works out to a pitch of 20 threads per inch.Where are you measuring the 4,7 mm diameter?Is that the major diameter or the minor diameter of the threads.If your are measuring the minor diameter then you have a 1/4-20 X 5/8 Socket head cap screw.Minor Thread Diameter on a 1/4-20 is 0.1905 inches. (4.8387 MM)Major Thread Diameter .250 inches. (6.35 mm)If that's what you have, they are readily availble here in the USA. Link to comment Share on other sites More sharing options...
Guest simplyconnected Posted June 4, 2009 Share Posted June 4, 2009 <div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Taco</div><div class="ubbcode-body">Yes, it's a socket head cap screw.Measerments: Total lenght: ... (5/8 inch) ...I bought some 10-32 x 1/2" and 10-32 x 3/4" bolts, but they are wrong... </div></div> You have a 1/4"-20 X 5/8" Socket-head cap screw (grade 8 steel), Taco. (That means, diameter=1/4" and threads per inch=20, and length=5/8".)Your bolt is VERY common here in the States. An even more common size is a 3/4" length bolt. Rather than stock every bolt in 1/8" length increments, we sometimes grind the tip off 1/8" (3.175mm) if it needs to be that precise. Usually it does not.This bolt is available with a socket head, or hex head (6-point), stainless steel, nylon, brass, or carbon steel either zinc plated or not.Ok, so how do we get five bolts to you? Personal Message me with your address, (so 100 people don't send you 500 bolts). - Dave Link to comment Share on other sites More sharing options...
Guest Taco Posted June 4, 2009 Share Posted June 4, 2009 The outer diameter of the threat is 6/32 inch.I do not understand the 1/4". That's allmost 6 mm, and mine is 4.65 mm. So, a bit thinner.Some people here say it's UNC, but what that is?I am sure about the '20' threat.Taco. Link to comment Share on other sites More sharing options...
Guest simplyconnected Posted June 4, 2009 Share Posted June 4, 2009 Click on this explaination: http://en.wikipedia.org/wiki/Unified_Thread_Standard Link to comment Share on other sites More sharing options...
F&J Posted June 5, 2009 Share Posted June 5, 2009 Guys, i don't think it's a 1/4-20 for two reasons:Look at the ruler scale and note that the bolt is MUCH thinner than 1/4" on that ruler...Plus, count the threads for one half inch.... I'd bet it's a 24 threads per inch.10-24 ?? 12-24 ?? I'll measure some if I have any, to see what the diameters are in decimals Link to comment Share on other sites More sharing options...
F&J Posted June 5, 2009 Share Posted June 5, 2009 I measured some new 10-24 (from Home Depot) and those are 4.75mm. Then I measured some other new 10-24 in various lengths from different manufacturers, and most are 4.7mm.Cut threads vs. rolled threads may cause the differences.I think it must be a 10-24. Can't be metric either, if it is what he measured. Link to comment Share on other sites More sharing options...
Guest simplyconnected Posted June 5, 2009 Share Posted June 5, 2009 <div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Taco</div><div class="ubbcode-body">I bought some 10-32 x 1/2" and 10-32 x 3/4" bolts, but they are wrong...</div></div> How were they wrong? Too big, too small?You may have a 3/16"-24 British Standard Whitworth (which are NOT common in the States. Your bolt threads are definately rolled and heat-treated.What are these screws used in? What did they come out of?Let's take a closer look: After closer examination, I do not think these are UNC bolts. They are Whitworth, and you can probably find them a lot cheaper by shopping in England. Thank you for the good pictures. Here is a chart that verifies your major diameter: http://shopswarf.orconhosting.net.nz/bsw.htmlHope this helps. - Dave Link to comment Share on other sites More sharing options...
Guest Taco Posted June 5, 2009 Share Posted June 5, 2009 @ simplyconnected:there was too much treath on de bolt at the same lenght.Ik will make a picture with 3 different bolts on it in one hour.Taco Link to comment Share on other sites More sharing options...
Guest Taco Posted June 5, 2009 Share Posted June 5, 2009 Here the pics:it's for a model airplane this time, not for my old car.And the bolts:On top a 10-32 x 3/4 (printed on package)(diameter 5/32)In the middle: 10-32 x 1/2 (diameter 3/16)(right diameter, but too much threat at 1 inch)These two different bolts were bought in the USA recently.At the bottom my unknown bolt.I will sent Larry Schramm my bolt, if we cannot find out what it is. But i think we will.Taco. Link to comment Share on other sites More sharing options...
DavidAU Posted June 5, 2009 Share Posted June 5, 2009 If you go to the technical section in this web site, you will be able to work out exactly what you have got. It looks to be BSW (British Standard Whitworth) to me.David http://www.classicfasteners.com.au/ Link to comment Share on other sites More sharing options...
Tom M Posted June 5, 2009 Share Posted June 5, 2009 Maybe here www.brafasco.com Or www.fascofastener.com Link to comment Share on other sites More sharing options...
Guest Taco Posted June 6, 2009 Share Posted June 6, 2009 It's difficult..........I will sent the bolt to Larry.He shall have a look for me.Taco. Link to comment Share on other sites More sharing options...
Guest Bob Call Posted June 7, 2009 Share Posted June 7, 2009 I think we are going down the wrong path here. If this for a model airplane (aeroplane) engine, the first thing is to establish the country of manufacture. Unless it is a vintage British, and it appears to be modern, it not be Whitworth. Unless it is US made, unlikley, it won't be UNC or UNF. That leaves metric if it is Japanese, Chzec or Russian or other european.So, Taco, what is the brand name and country of origin on the engine? Link to comment Share on other sites More sharing options...
Guest Taco Posted June 8, 2009 Share Posted June 8, 2009 The engine is made in the USA and Canada.There is no name on it further.Today i will sent the bolt to Larry. He will find out what it is, and get me some i hope.Taco. Link to comment Share on other sites More sharing options...
Guest Bob Call Posted June 10, 2009 Share Posted June 10, 2009 TacoYour engine looks a lot like this Zenoah which is Jananese made and is metric.http://www.alibaba.com/product-gs/213165001/ZENOAH_G380PU_Specialize_in_airplane_38CC.htmlWhat on your engine is marked made in Canada or USA? The spark plug or ignition parts? Link to comment Share on other sites More sharing options...
Guest simplyconnected Posted June 10, 2009 Share Posted June 10, 2009 Good call, Bob. It might be a different older model, but you're REAL close. Link to comment Share on other sites More sharing options...
Guest Taco Posted June 10, 2009 Share Posted June 10, 2009 Yes, you are right, it could be a Zenoah.<span style="font-style: italic">Made in the Canada </span>is on the bottom of the crank case.<span style="font-style: italic">Made in the USA </span>is on the Fly wheel. And There is <span style="font-style: italic">REPCO</span> written on.There are some differents between the drawing and the photograph, but you may say it's maybe an older version of Zenoah?Taco. Link to comment Share on other sites More sharing options...
Guest Bob Call Posted June 11, 2009 Share Posted June 11, 2009 I am going to take a guess on this. Repco is/was a Hong Kong exporting company that exported all sorts of stuff from Asia. My guess is that the flywheel, part of the magneto ignition sytem was made in the USA. The crankcase casting made in Canada. The rest of the engine was imported by Repco and the US and Canadian parts added to get around import duties that would have been levied on a complete engine and allowing the importer to pay lower rates on parts. Link to comment Share on other sites More sharing options...
Ozstatman Posted June 12, 2009 Share Posted June 12, 2009 <div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Bob Call</div><div class="ubbcode-body">I am going to take a guess on this. Repco is/was a Hong Kong exporting company that exported all sorts of stuff from Asia........</div></div>Repco is actually an Australian automotive parts companyhttp://www.repco.com.au/Repco had a huge hand in the development of the engine used by Jack Brabham to win the Formula 1 drivers championship http://www.navilus.com.au/ph/rb/repcob.htmhttp://www.jack-brabham-engines.com/yourstory.aspx Link to comment Share on other sites More sharing options...
Guest Bob Call Posted June 12, 2009 Share Posted June 12, 2009 OZThere is more than one Repco. I am also aware of the auto parts company. The Repco in Hong Kong was primarily a toy exporting company but also dealt in other products like model airplanes and engines.--------------------------------We'll all be drinkin' that free Bubble Up and eatin' that rainbow stew. Merle Haggard 1981http://www.cmt.com/videos/merle-haggard/26454/rainbow-stew.jhtml Link to comment Share on other sites More sharing options...
Ozstatman Posted June 14, 2009 Share Posted June 14, 2009 Thanks Bob, learned something today. Link to comment Share on other sites More sharing options...
Rusty_OToole Posted June 14, 2009 Share Posted June 14, 2009 If it was made in the US or Canada it may be metric or US threads.Canada adopted the metric system officially in 1970 but continues to use both US and metric fasteners. Link to comment Share on other sites More sharing options...
Larry Schramm Posted June 14, 2009 Share Posted June 14, 2009 I will finally end the discussion as to the thread pitch and size. It is a 10-24 bolt that is about 5/8" long. I have included a picture for everyone to see. Hopefully it will come through. And yes Taco, that is your bolt. :-)Regards, Link to comment Share on other sites More sharing options...
MCHinson Posted June 14, 2009 Share Posted June 14, 2009 Good to see that it has been positively identified. (And privately happy to see that my suspicions about what it was were actually correct...)So, Larry, are you sending him what he needs, or does he still need them? Link to comment Share on other sites More sharing options...
Larry Schramm Posted June 14, 2009 Share Posted June 14, 2009 Will be sending them out this week Link to comment Share on other sites More sharing options...
Guest Taco Posted June 15, 2009 Share Posted June 15, 2009 Many thanks......Tell me what the costs are.Taco. Link to comment Share on other sites More sharing options...
Guest Taco Posted June 19, 2009 Share Posted June 19, 2009 Bolts arrived today,Thanks again Larry.Taco. Link to comment Share on other sites More sharing options...
Guest Bob Call Posted June 20, 2009 Share Posted June 20, 2009 TacoAre you preparing this engine for a large (1/4) scale model airplane? If so, what is it?----------------------------------------------We'll all be drinkin' that free Bubble Up and eatin' that rainbow stew. Merle Haggard 1981http://www.cmt.com/videos/merle-haggard/26454/rainbow-stew.jhtml Link to comment Share on other sites More sharing options...
Guest Taco Posted June 20, 2009 Share Posted June 20, 2009 No, it's not for myself, but for my son (9 years old).The plane is a Klemm 25.Yes, it's 1/4-scale i think, wingspan is 260 cm.Taco. Link to comment Share on other sites More sharing options...
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