Halcohead
Stainless
- Joined
- Apr 10, 2005
- Location
- Bay Area, Ca
I need to lock some cast iron 1"-32 threaded plugs into an aluminum block. I was planning on using a "Dutch pin" technique, but have never done so. Is there anything to watch out for on this?
(By Dutch pin I mean a pin that is dropped into a hole which was drilled and reamed across a threaded fastener, thus locking the fastener in place)
The reason I ask is that normally I would just go ahead and drill and ream, however the dissimilar materials make things more complicated. I am wary of using a striaght-flute reamer because the hole is different materials on each side, and I figure any reamer is going to tend to cut the aluminum more than the cast iron (an oval hole is no good). Should I use a drill followed by an endmill, and just pick an oversize pin?
Sorry for the basic question, but I'm no toolmaker, and it's been hard to find references for things like this. If anyone has any references for different jig and pinning techniques, I am all ears. This is a world way beyond the basic mill/lathe stuff I've been doing up to now. I know reading won't make me a toolmaker, but I'd like to at least know about what techniques are out there.
(By Dutch pin I mean a pin that is dropped into a hole which was drilled and reamed across a threaded fastener, thus locking the fastener in place)
The reason I ask is that normally I would just go ahead and drill and ream, however the dissimilar materials make things more complicated. I am wary of using a striaght-flute reamer because the hole is different materials on each side, and I figure any reamer is going to tend to cut the aluminum more than the cast iron (an oval hole is no good). Should I use a drill followed by an endmill, and just pick an oversize pin?
Sorry for the basic question, but I'm no toolmaker, and it's been hard to find references for things like this. If anyone has any references for different jig and pinning techniques, I am all ears. This is a world way beyond the basic mill/lathe stuff I've been doing up to now. I know reading won't make me a toolmaker, but I'd like to at least know about what techniques are out there.