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#11
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Converting Brake mounting bolt to recessed bolt?
On 21 Aug, 21:24, _
wrote: On Fri, 21 Aug 2009 13:12:21 -0700 (PDT), someone wrote: Cutting two lengths of tube is much easier than cutting and threading an already hardened chromoly mounting bolt btw. I'd be interested in the source for this claim that Shimano N600 brake bolts are a) "chromoly"; and b) hardened of course, if it's of the nature of "my 'experience' says so, and I'm dead clever, I am", that will get the weight it deserves. I'd be interested in the source for this claim that: --------------------------------------------------- I'd be interested in the source for this claim that Shimano N600 brake bolts are a) "chromoly"; and b) hardened of course, if it's of the nature of "my 'experience' says so, and I'm dead clever, I am", that will get the weight it deserves. ----------------------------------------------------------- Why do you infer I made such a claim? I was giving my experience of hardened brake pivot bolt. I was not being specific to model. I suspected it may apply to 600 calipers at least in some markets. Using a dot punch on the end of the bolt will quickly determine if the bolt is hardened or not. Reliance on published data is no guarantee that the bolt is one or the other. |
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#12
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Converting Brake mounting bolt to recessed bolt?
someone wrote:
Cutting two lengths of tube is much easier than cutting and threading an already hardened chromoly mounting bolt btw. _ wrote: I'd be interested in the source for this claim that Shimano N600 brake bolts are a) "chromoly"; and b) hardened of course, if it's of the nature of "my 'experience' says so, and I'm dead clever, I am", that will get the weight it deserves. AMuzi wrote: I doubt they are CrMo and they are certainly not hardened (having threaded them). Ben C wrote: A related question: if a bolt is CrMo presumably that implies it's not stainless and will therefore rust? They rust. Some stainless alloys are more resistant to corrosion than others. "stainless" (inoxydable in EU) just means it rusts less quickly. Mild steel rusts roughly the same as CrMo steel. A brake bolt oughta be oiled anyway so it's not a problem in real life. -- Andrew Muzi www.yellowjersey.org/ Open every day since 1 April, 1971 |
#13
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Converting Brake mounting bolt to recessed bolt?
On Aug 21, 3:59*pm, AMuzi wrote:
Sir Ridesalot wrote: I have a pair of old Shimano N-600 single pivot brakes I want to put on my repainted MIELE Uno. These brakes are the nutted type and I want to use recessed nuts on them. Is there any reason I can't just use a die to cut more thread on the existing bolt and then cut off the bolyt shorter for the recessed bolts? Does anyone know what die threading I'd need for these threads? Use the medium length rear for your allen front then cut the long bolt and thread it m6 x 1.0 for the allen rear. Since the rear brake is oriented to present less danger of a failure, do it that way and use the factory threaded 'rear' bolt in front. Or of course alternately get a Shimano short bolt for the rear. -- Andrew Muzi * www.yellowjersey.org/ * Open every day since 1 April, 1971 Hi and thanks Andrew. I'll go and get the M6 x 1.0 die you recommend. Cheers from Peter |
#14
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Converting Brake mounting bolt to recessed bolt?
On Fri, 21 Aug 2009 14:41:36 -0700 (PDT), someone wrote:
On 21 Aug, 21:24, _ wrote: On Fri, 21 Aug 2009 13:12:21 -0700 (PDT), someone wrote: Cutting two lengths of tube is much easier than cutting and threading an already hardened chromoly mounting bolt btw. I'd be interested in the source for this claim that Shimano N600 brake bolts are a) "chromoly"; and b) hardened of course, if it's of the nature of "my 'experience' says so, and I'm dead clever, I am", that will get the weight it deserves. I'd be interested in the source for this claim that: --------------------------------------------------- I'd be interested in the source for this claim that Shimano N600 brake bolts are a) "chromoly"; and b) hardened of course, if it's of the nature of "my 'experience' says so, and I'm dead clever, I am", that will get the weight it deserves. ----------------------------------------------------------- Why do you infer I made such a claim? I was giving my experience of hardened brake pivot bolt. I was not being specific to model. I suspected it may apply to 600 calipers at least in some markets. Using a dot punch on the end of the bolt will quickly determine if the bolt is hardened or not. Reliance on published data is no guarantee that the bolt is one or the other. I'd be interested in the source of this claim that *any* brake bolts are a) "chromoly"; and b) hardened (with the same caveat in re "experience"). |
#15
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Converting Brake mounting bolt to recessed bolt?
On Aug 22, 12:55*pm, _
wrote: On Fri, 21 Aug 2009 14:41:36 -0700 (PDT), someone wrote: On 21 Aug, 21:24, _ wrote: On Fri, 21 Aug 2009 13:12:21 -0700 (PDT), someone wrote: Cutting two lengths of tube is much easier than cutting and threading an already hardened chromoly mounting bolt btw. I'd be interested in the source for this claim that Shimano N600 brake bolts are a) "chromoly"; and b) hardened of course, if it's of the nature of "my 'experience' says so, and I'm dead clever, I am", that will get the weight it deserves. I'd be interested in the source for this claim that: --------------------------------------------------- I'd be interested in the source for this claim that Shimano N600 brake bolts are *a) "chromoly"; and *b) hardened *of course, if it's of the nature of "my 'experience' says so, and I'm dead *clever, I am", that will get the weight it deserves. ----------------------------------------------------------- Why do you infer I made such a claim? * I was giving my experience of hardened brake pivot bolt. *I was not being specific to model. *I suspected it may apply to 600 calipers at least in some markets. Using a dot punch on the end of the bolt will quickly determine if the bolt is hardened or not. *Reliance on published data is no guarantee that the bolt is one or the other. I'd be interested in the source of this claim that *any* brake bolts are a) "chromoly"; and b) hardened (with the same caveat in re "experience"). would you prefer a softened pivot bolt? |
#16
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Converting Brake mounting bolt to recessed bolt?
On Sat, 22 Aug 2009 05:12:21 -0700 (PDT), someone wrote:
On Aug 22, 12:55*pm, _ wrote: On Fri, 21 Aug 2009 14:41:36 -0700 (PDT), someone wrote: On 21 Aug, 21:24, _ wrote: On Fri, 21 Aug 2009 13:12:21 -0700 (PDT), someone wrote: Cutting two lengths of tube is much easier than cutting and threading an already hardened chromoly mounting bolt btw. I'd be interested in the source for this claim that Shimano N600 brake bolts are a) "chromoly"; and b) hardened of course, if it's of the nature of "my 'experience' says so, and I'm dead clever, I am", that will get the weight it deserves. I'd be interested in the source for this claim that: --------------------------------------------------- I'd be interested in the source for this claim that Shimano N600 brake bolts are *a) "chromoly"; and *b) hardened *of course, if it's of the nature of "my 'experience' says so, and I'm dead *clever, I am", that will get the weight it deserves. ----------------------------------------------------------- Why do you infer I made such a claim? * I was giving my experience of hardened brake pivot bolt. *I was not being specific to model. *I suspected it may apply to 600 calipers at least in some markets. Using a dot punch on the end of the bolt will quickly determine if the bolt is hardened or not. *Reliance on published data is no guarantee that the bolt is one or the other. I'd be interested in the source of this claim that *any* brake bolts are a) "chromoly"; and b) hardened (with the same caveat in re "experience"). would you prefer a softened pivot bolt? Irrelevant. Still waiting for the source for your claim that brake bolts are a) "chromoly"; and b) hardened. |
#17
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Converting Brake mounting bolt to recessed bolt?
On Aug 22, 8:06*pm, _
wrote: On Sat, 22 Aug 2009 05:12:21 -0700 (PDT), someone wrote: On Aug 22, 12:55*pm, _ wrote: On Fri, 21 Aug 2009 14:41:36 -0700 (PDT), someone wrote: On 21 Aug, 21:24, _ wrote: On Fri, 21 Aug 2009 13:12:21 -0700 (PDT), someone wrote: Cutting two lengths of tube is much easier than cutting and threading an already hardened chromoly mounting bolt btw. I'd be interested in the source for this claim that Shimano N600 brake bolts are a) "chromoly"; and b) hardened of course, if it's of the nature of "my 'experience' says so, and I'm dead clever, I am", that will get the weight it deserves. I'd be interested in the source for this claim that: --------------------------------------------------- I'd be interested in the source for this claim that Shimano N600 brake bolts are *a) "chromoly"; and *b) hardened *of course, if it's of the nature of "my 'experience' says so, and I'm dead *clever, I am", that will get the weight it deserves. ----------------------------------------------------------- Why do you infer I made such a claim? * I was giving my experience of hardened brake pivot bolt. *I was not being specific to model. *I suspected it may apply to 600 calipers at least in some markets. Using a dot punch on the end of the bolt will quickly determine if the bolt is hardened or not. *Reliance on published data is no guarantee that the bolt is one or the other. I'd be interested in the source of this claim that *any* brake bolts are a) "chromoly"; and b) hardened (with the same caveat in re "experience"). would you prefer a softened pivot bolt? Irrelevant. Still waiting for the source for your claim that brake bolts are a) "chromoly"; and b) hardened. Perhaps that wont be too long for you, he's dead. At least one of the sets of weinmann brakes I had had a hardened and plated, if not chromoly, cenytre bolt, I couldn't sink a dot punch with a normal strike. These were likely the 500 with QR or the 405, a pure racing set. Absolutely spot on brakes (405) as long as the rubber wasn't too old. I have a feeling that these were considered, along with Carerra to be at least the equal of Campag's Gran sport and Record models in terms of performance. To claim that the bolt is in an annealed state is ridiculous for a quality item. The bolt must have some temper to suit its purpose. |
#18
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Converting Brake mounting bolt to recessed bolt?
On Sat, 22 Aug 2009 13:09:56 -0700 (PDT), someone wrote:
On Aug 22, 8:06*pm, _ wrote: On Sat, 22 Aug 2009 05:12:21 -0700 (PDT), someone wrote: On Aug 22, 12:55*pm, _ wrote: On Fri, 21 Aug 2009 14:41:36 -0700 (PDT), someone wrote: On 21 Aug, 21:24, _ wrote: On Fri, 21 Aug 2009 13:12:21 -0700 (PDT), someone wrote: Cutting two lengths of tube is much easier than cutting and threading an already hardened chromoly mounting bolt btw. I'd be interested in the source for this claim that Shimano N600 brake bolts are a) "chromoly"; and b) hardened of course, if it's of the nature of "my 'experience' says so, and I'm dead clever, I am", that will get the weight it deserves. I'd be interested in the source for this claim that: --------------------------------------------------- I'd be interested in the source for this claim that Shimano N600 brake bolts are *a) "chromoly"; and *b) hardened *of course, if it's of the nature of "my 'experience' says so, and I'm dead *clever, I am", that will get the weight it deserves. ----------------------------------------------------------- Why do you infer I made such a claim? * I was giving my experience of hardened brake pivot bolt. *I was not being specific to model. *I suspected it may apply to 600 calipers at least in some markets. Using a dot punch on the end of the bolt will quickly determine if the bolt is hardened or not. *Reliance on published data is no guarantee that the bolt is one or the other. I'd be interested in the source of this claim that *any* brake bolts are a) "chromoly"; and b) hardened (with the same caveat in re "experience"). would you prefer a softened pivot bolt? Irrelevant. Still waiting for the source for your claim that brake bolts are a) "chromoly"; and b) hardened. Perhaps that wont be too long for you, he's dead. At least one of the sets of weinmann brakes I had had a hardened and plated, if not chromoly, cenytre bolt, I couldn't sink a dot punch with a normal strike. These were likely the 500 with QR or the 405, a pure racing set. Absolutely spot on brakes (405) as long as the rubber wasn't too old. I have a feeling that these were considered, along with Carerra to be at least the equal of Campag's Gran sport and Record models in terms of performance. To claim that the bolt is in an annealed state is ridiculous for a quality item. The bolt must have some temper to suit its purpose. So, we've gone from a) Shimano bolts are "chromoly" and hardened; to b) some brake bolts are "chromoly" and hardened; to c) a guy who's now dead told you something a long time ago about brake bolts being either "chomoly" or hardened (or both), and you had one once that you don't know if it was "chomoly" or plated, and you were unable to make a mark on it with a punch, so you are sure it was hardened. (That you expected to tell the particular composition of a steel just by looking at it somehow does not surprise me.) I just went in the box of bits and took a file to the ends of 16 brake bolts from ten different manufacturers. Three of those were Weinmann (an Alpha, a 570 Top, and a Vainquer 999). Not one of those 16 had a brake bolt that the file did not easily cut. Now, of course, we (at least those of us with some modicum of technical knowledge) know that "hard" and "chromloy" are not specific terms; hardness being a widely varying quality, and "chromoly" ususally referring to any of a number of steels... ....but your claim, such as it is and absent any further suppport, can safely be filed with the ones of most cyclists having exceeded 60 miles an hour, qr skewers never having cut threads, and diesel engines being defined as having no valves. |
#19
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Converting Brake mounting bolt to recessed bolt?
On 23 Aug, 12:44, _
wrote: On Sat, 22 Aug 2009 13:09:56 -0700 (PDT), someone wrote: On Aug 22, 8:06*pm, _ wrote: On Sat, 22 Aug 2009 05:12:21 -0700 (PDT), someone wrote: On Aug 22, 12:55*pm, _ wrote: On Fri, 21 Aug 2009 14:41:36 -0700 (PDT), someone wrote: On 21 Aug, 21:24, _ wrote: On Fri, 21 Aug 2009 13:12:21 -0700 (PDT), someone wrote: Cutting two lengths of tube is much easier than cutting and threading an already hardened chromoly mounting bolt btw. I'd be interested in the source for this claim that Shimano N600 brake bolts are a) "chromoly"; and b) hardened of course, if it's of the nature of "my 'experience' says so, and I'm dead clever, I am", that will get the weight it deserves. I'd be interested in the source for this claim that: --------------------------------------------------- I'd be interested in the source for this claim that Shimano N600 brake bolts are *a) "chromoly"; and *b) hardened *of course, if it's of the nature of "my 'experience' says so, and I'm dead *clever, I am", that will get the weight it deserves. ----------------------------------------------------------- Why do you infer I made such a claim? * I was giving my experience of hardened brake pivot bolt. *I was not being specific to model. *I suspected it may apply to 600 calipers at least in some markets. Using a dot punch on the end of the bolt will quickly determine if the bolt is hardened or not. *Reliance on published data is no guarantee that the bolt is one or the other. I'd be interested in the source of this claim that *any* brake bolts are a) "chromoly"; and b) hardened (with the same caveat in re "experience"). would you prefer a softened pivot bolt? Irrelevant. Still waiting for the source for your claim that brake bolts are a) "chromoly"; and b) hardened. Perhaps that wont be too long for you, he's dead. *At least one of the sets of weinmann brakes I had had a *hardened and plated, if not chromoly, cenytre bolt, I couldn't sink a dot punch with a normal strike. * These were likely the 500 with QR or the 405, a pure racing set. *Absolutely spot on brakes (405) as long as the rubber wasn't too old. *I have a feeling that these were considered, along with Carerra to be at least the equal of Campag's Gran sport and Record models in terms of performance. *To claim that the bolt is in an annealed state is ridiculous for a quality item. *The bolt must have some temper to suit its purpose. So, we've gone from a) Shimano bolts are "chromoly" and hardened; to b) some brake bolts are "chromoly" and hardened; to c) a guy who's now dead told you something a long time ago about brake bolts being either "chomoly" or hardened (or both), and you had one once that you don't know if it was "chomoly" or plated, and you were unable to make a mark on it with a punch, so you are sure it was hardened. (That you expected to tell the particular composition of a steel just by looking at it somehow does not surprise me.) I just went in the box of bits and took a file to the ends of 16 brake bolts from ten different manufacturers. *Three of those were Weinmann (an Alpha, a 570 Top, and a Vainquer 999). Not one of those 16 had a brake bolt that the file did not easily cut. * Now, of course, we (at least those of us with some modicum of technical knowledge) know that "hard" and "chromloy" are not specific terms; hardness being a widely varying quality, and "chromoly" ususally referring to any of a number of steels... ...but your claim, such as it is and absent any further suppport, can safely be filed with the ones of most cyclists having exceeded 60 miles an hour, qr skewers never having cut threads, and diesel engines being defined as having no valves. with knobs on. |
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