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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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#1
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Metric Trapezoidal Threads
I need to machine some metric trapezoidal threads. Both internal and
external. What's the best way to do that? Is hand grinding the tools going to be my best approach? I think maybe it is since they are for making molds of two mating parts. The molds can't be of the exact thread forms or the parts won't fit together. A proper cutting tool for those threads might not produce what I need. I'm still thinking my way through the process. |
#2
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Metric Trapezoidal Threads
On 12/5/2018 10:04 AM, Bob La Londe wrote:
I need to machine some metric trapezoidal threads.Â* Both internal and external. What's the best way to do that? Is hand grinding the tools going to be my best approach?Â* I think maybe it is since they are for making molds of two mating parts.Â* The molds can't be of the exact thread forms or the parts won't fit together.Â* A proper cutting tool for those threads might not produce what I need. I'm still thinking my way through the process. There's guy on Youtube that ground his own tools for making ACME threads. Same thing as trapezoidal. Only different. He has a channel. This Old Tony. Steve |
#3
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Metric Trapezoidal Threads
"shiggins" wrote in message
... On 12/5/2018 10:04 AM, Bob La Londe wrote: I need to machine some metric trapezoidal threads. Both internal and external. What's the best way to do that? Is hand grinding the tools going to be my best approach? I think maybe it is since they are for making molds of two mating parts. The molds can't be of the exact thread forms or the parts won't fit together. A proper cutting tool for those threads might not produce what I need. I'm still thinking my way through the process. There's guy on Youtube that ground his own tools for making ACME threads. Same thing as trapezoidal. Only different. He has a channel. This Old Tony. Steve **************** Thanks Steve. I actually follow his channel and I've seen the "ACME? Ac-You" title a few times. I don't think I ever watched it before. Thanks again. |
#4
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Metric Trapezoidal Threads
"Bob La Londe" wrote in message
news I need to machine some metric trapezoidal threads. Both internal and external. What's the best way to do that? Is hand grinding the tools going to be my best approach? I think maybe it is since they are for making molds of two mating parts. The molds can't be of the exact thread forms or the parts won't fit together. A proper cutting tool for those threads might not produce what I need. I'm still thinking my way through the process. A local vendor who has closed sold me an imported 3-axis angle vise like this that I use to surface-grind angular and trapezoidal threading and spline milling bits. http://www.wikiwand.com/en/Tool_and_cutter_grinder |
#5
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Metric Trapezoidal Threads
"Jim Wilkins" wrote in message news
"Bob La Londe" wrote in message news I need to machine some metric trapezoidal threads. Both internal and external. What's the best way to do that? Is hand grinding the tools going to be my best approach? I think maybe it is since they are for making molds of two mating parts. The molds can't be of the exact thread forms or the parts won't fit together. A proper cutting tool for those threads might not produce what I need. I'm still thinking my way through the process. A local vendor who has closed sold me an imported 3-axis angle vise like this that I use to surface-grind angular and trapezoidal threading and spline milling bits. http://www.wikiwand.com/en/Tool_and_cutter_grinder ***************** The link brings up a CNC tool grinder. If that's what he gave you.... WOW! I'm impressed. You reminded my I have an antique (its so old the cords have cloth wrap) basic tool grinder on the shelf that I saved from going into the dumpster on a house clean out from a hoarder who passed on. Its halfway apart and needs to be taken all the way apart, but it might just be a good project to move up the projects board. |
#6
Posted to rec.crafts.metalworking
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Metric Trapezoidal Threads
"Bob La Londe" wrote in message
news "Jim Wilkins" wrote in message news "Bob La Londe" wrote in message news I need to machine some metric trapezoidal threads. Both internal and external. What's the best way to do that? Is hand grinding the tools going to be my best approach? I think maybe it is since they are for making molds of two mating parts. The molds can't be of the exact thread forms or the parts won't fit together. A proper cutting tool for those threads might not produce what I need. I'm still thinking my way through the process. A local vendor who has closed sold me an imported 3-axis angle vise like this that I use to surface-grind angular and trapezoidal threading and spline milling bits. http://www.wikiwand.com/en/Tool_and_cutter_grinder ***************** The link brings up a CNC tool grinder. If that's what he gave you.... WOW! I'm impressed. You reminded my I have an antique (its so old the cords have cloth wrap) basic tool grinder on the shelf that I saved from going into the dumpster on a house clean out from a hoarder who passed on. Its halfway apart and needs to be taken all the way apart, but it might just be a good project to move up the projects board. I wish! My surface and cutter grinder is a small manual machine from the 1940's. The vise is similar to the vise on multiple swivels on the table of the green manual tool & cutter grinder. I used it for example to grind a trapezoidal bit to spline a shaft to accept a motorcycle final drive sprocket, in the transmission on my sawmill. I machined the shaft grooves slightly too small and pressed on the sprocket, so the bit geometry didn't have to match exactly. |
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