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Rifles, Reloading, Optics, Equipment
Gunsmithing
Cutting dovetails, how hard can it be...
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<blockquote data-quote="Trickymissfit" data-source="post: 631770" data-attributes="member: 25383"><p>1020 CRS dosn't cut well with a lot of contact area. (material is very gummy like in nature) There's a couple ways to get around a lot of this, and really the best way is to use a different cutter. I used to grind the desired dove tail onto end mills (I think you can buy them already ground). You need a good spray mist coolant to keep the temps down and lube the bottom side of that dovetail cutter. But an even better material for your use would be generic 8620 (you can buy it in a ground finish to save some work). Still remember your milling the dovetail, and it will never be that quality of a dove tail cut on a shaper with single point contact, or wiring the shape out. We kept an old G&E shaper in the shop just for cutting precision dove tails as it was far more accurate.</p><p> </p><p>Next time look around for a piece of 8620 bar stock, or even O-1 gauge stock. Make a roug cut with about .0075" stock left on the bottom flat face. Use something like grinder coolant with a little bit of cutting oil added to it (maybe one cup per gallon). There is a way to regrind the dove tail cutter if there's not enough bottom relief, but the end mill already has it and cuts better.</p><p>gary</p></blockquote><p></p>
[QUOTE="Trickymissfit, post: 631770, member: 25383"] 1020 CRS dosn't cut well with a lot of contact area. (material is very gummy like in nature) There's a couple ways to get around a lot of this, and really the best way is to use a different cutter. I used to grind the desired dove tail onto end mills (I think you can buy them already ground). You need a good spray mist coolant to keep the temps down and lube the bottom side of that dovetail cutter. But an even better material for your use would be generic 8620 (you can buy it in a ground finish to save some work). Still remember your milling the dovetail, and it will never be that quality of a dove tail cut on a shaper with single point contact, or wiring the shape out. We kept an old G&E shaper in the shop just for cutting precision dove tails as it was far more accurate. Next time look around for a piece of 8620 bar stock, or even O-1 gauge stock. Make a roug cut with about .0075" stock left on the bottom flat face. Use something like grinder coolant with a little bit of cutting oil added to it (maybe one cup per gallon). There is a way to regrind the dove tail cutter if there's not enough bottom relief, but the end mill already has it and cuts better. gary [/QUOTE]
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Cutting dovetails, how hard can it be...
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