ballen
Diamond
- Joined
- Sep 25, 2011
- Location
- Garbsen, Germany
Where can I purchase or order a reasonably-priced MT2 hollow-point (female) carbide dead center (60 degree)?
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Where can I purchase or order a reasonably-priced MT2 hollow-point (female) carbide dead center (60 degree)?
What I need is shown on the second page of this catalog (first item). But the prices are not reasonable....
It used to be common to take a cutting tool that did not have a center to grind a point on the tool, then grind it between one or two female centers. the with the tool to needs (ground to size) grind off the point.
So we had a number of female centers in grinding shops but I never saw on in a catalog.... and don't know who made them.
Not a full cone but for limited size on can braze or press a carbide drill or reamer bushing on a Morse taper stub and mock up a dead center.
I currently use a MT2 drill chuck arbor when I need a hollow center.
Agree it looks like Bruce has a nice shop..but still a good idea to pick some Pm guys minds to get ideas. Most great ideas are old-hat to someone.
Pretty good reason to grind them, yah?Bill: the carbide bushings don't have the correct form to be precision centers.
You must not have seen an ER20 (or even smaller...) on #2 MT, then? The Carbide would be INSIDE the collet, so there is hardly any difference in hang-out,I also don't like the idea of having these hanging out in an ER20 collet on the end of an MT2 shank. For rigidity and precision I'd like the center support as short and close to the tailstock as possible.
Also, I don't like the idea of grinding grit and coolant filling up an ER collet and holder. Grinding is messy.
Pretty good reason to grind them, yah?
You must not have seen an ER20 (or even smaller...) on #2 MT, then? The Carbide would be INSIDE the collet, so there is hardly any difference in hang-out
This isn't a built-in to the grinder. It's removable. Just pop it out and go rinse it when it needs that.
Perhaps...
When you get or make an internal grinding attachment, small diamond-plated pins are pretty cheap. Almost as cheap as mounted AlO or SiC stones of similar size, if you find the right source. Just ensure your grinding attachment can take small diameter shanks. Over here, the typical shank diameters would be 3/32" (2.38mm), 1/8" (3.175mm) or 1/4" (6.35mm); in the rest of the world, 2.35mm, 3mm and 6mm. Pins with 6mm or 1/4" shanks are probably too big for this particular application.I am not yet set up for internal grinding, and don't have diamond tooling.
An expired carbide centered cutter set between centers and ground to press into a #2 sleeve.
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