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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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Notching cast iron 4" drain pipe....
I've got the "hub" part of a cast iron drain pipe accessible in a floor drain, and need to notch the lip, for the outlet of one of those li'l-giant-type centrifugal pumps that I want to drop in. The side outlet of the pump sticks out past the diameter of the pump, ergo the need for a notch, since it's a tight cylindrical fit. The notch needs to be about 1-2" long, mebbe 3/4" wide. Best way to cut? Regular metal cutting (sawzall), I think, are almost out of the question, as I've tried this on other CI drain pipe -- pert near impossible, without one of those coke-bottle cutting grit blades, which I didn't have.. I had to rent one of those "splitters", and even that was difficult. Would an abrasive sawzall blade do the job efficiently? Are there diff. types of sawzall abrasive blades? Woud I be better off grinding it out, with a 4.5" grinder, I spose. O/A seems to be a poor method, according to http://www.practicalmachinist.com/vb...t-iron-195329/ The reason being left-over graphite? Somewhere in he http://en.wikipedia.org/wiki/Oxy-fue...ng_and_cutting Plasma, air-arc seem to be OK, but, no gots. Idears? -- EA |
#2
Posted to rec.crafts.metalworking
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Notching cast iron 4" drain pipe....
Existential Angst wrote:
I've got the "hub" part of a cast iron drain pipe accessible in a floor drain, and need to notch the lip, for the outlet of one of those li'l-giant-type centrifugal pumps that I want to drop in. The side outlet of the pump sticks out past the diameter of the pump, ergo the need for a notch, since it's a tight cylindrical fit. The notch needs to be about 1-2" long, mebbe 3/4" wide. Best way to cut? Regular metal cutting (sawzall), I think, are almost out of the question, as I've tried this on other CI drain pipe -- pert near impossible, without one of those coke-bottle cutting grit blades, which I didn't have.. I had to rent one of those "splitters", and even that was difficult. Would an abrasive sawzall blade do the job efficiently? Are there diff. types of sawzall abrasive blades? Woud I be better off grinding it out, with a 4.5" grinder, I spose. O/A seems to be a poor method, according to http://www.practicalmachinist.com/vb...t-iron-195329/ The reason being left-over graphite? Somewhere in he http://en.wikipedia.org/wiki/Oxy-fue...ng_and_cutting Plasma, air-arc seem to be OK, but, no gots. Idears? drilling holes and using a chisel to cut works on cast iron. It's a great way to get one final use out of ****ted up drill bits too. |
#3
Posted to rec.crafts.metalworking
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Notching cast iron 4" drain pipe....
On Nov 6, 10:21*am, "Existential Angst" wrote:
I've got the "hub" part of a cast iron drain pipe accessible in a floor drain, and need to notch the lip, for the outlet of one of those li'l-giant-type centrifugal pumps that I want to drop in. *The side outlet of the pump sticks out past the diameter of the pump, ergo the need for a notch, since it's a tight cylindrical fit. *The notch needs to be about 1-2" long, mebbe 3/4" wide. *Best way to cut? Regular metal cutting (sawzall), I think, are almost out of the question, as I've tried this on other CI drain pipe -- pert near impossible, without one of those coke-bottle cutting grit blades, which I didn't have.. *I had to rent one of those "splitters", and even that was difficult. Would an abrasive sawzall blade do the job efficiently? *Are there diff.. types of sawzall abrasive blades? Woud I be better off grinding it out, with a 4.5" grinder, I spose. O/A seems to be a poor method, according tohttp://www.practicalmachinist.com/vb/fabrication-cnc-laser-waterjet-p... The reason being left-over graphite? *Somewhere in hehttp://en.wikipedia.org/wiki/Oxy-fue...ng_and_cutting Plasma, air-arc seem to be OK, but, no gots. Idears? -- EA Thin-wall castings tend to have a lot of chill, making them hard to drill/saw. You could try drilling small holes around the notch periphery, then using an angle grinder and a thin cutting wheel to slice the chunk out. If you can't drill, then the angle grinder is about it. I had some wheels about .040" called Razorblades, really cut steel fast. I'd be a little reluctant to do any hammering or chiseling on drain pipe. Won't be a job you'll get done in 10 minutes, that's for sure. Stan |
#4
Posted to rec.crafts.metalworking
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Notching cast iron 4" drain pipe....
"Stanley Schaefer" wrote in message
... On Nov 6, 10:21 am, "Existential Angst" wrote: I've got the "hub" part of a cast iron drain pipe accessible in a floor drain, and need to notch the lip, for the outlet of one of those li'l-giant-type centrifugal pumps that I want to drop in. The side outlet of the pump sticks out past the diameter of the pump, ergo the need for a notch, since it's a tight cylindrical fit. The notch needs to be about 1-2" long, mebbe 3/4" wide. Best way to cut? Regular metal cutting (sawzall), I think, are almost out of the question, as I've tried this on other CI drain pipe -- pert near impossible, without one of those coke-bottle cutting grit blades, which I didn't have.. I had to rent one of those "splitters", and even that was difficult. Would an abrasive sawzall blade do the job efficiently? Are there diff. types of sawzall abrasive blades? Woud I be better off grinding it out, with a 4.5" grinder, I spose. O/A seems to be a poor method, according tohttp://www.practicalmachinist.com/vb/fabrication-cnc-laser-waterjet-p... The reason being left-over graphite? Somewhere in hehttp://en.wikipedia.org/wiki/Oxy-fue...ng_and_cutting Plasma, air-arc seem to be OK, but, no gots. Idears? -- EA Thin-wall castings tend to have a lot of chill, making them hard to drill/saw. You could try drilling small holes around the notch periphery, then using an angle grinder and a thin cutting wheel to slice the chunk out. If you can't drill, then the angle grinder is about it. I had some wheels about .040" called Razorblades, really cut steel fast. I'd be a little reluctant to do any hammering or chiseling on drain pipe. Won't be a job you'll get done in 10 minutes, that's for sure. ================================================== = F'sure -- dat ****ty little notch is going to be enormous effort, for the job. I have one or two of those thin 4.5" wheels, a sample.... that's a good idea. I'll get one of those abrasive-grit sawzall blades, to try, and to just have around. Re the drilling: Drilling is no picnic either, even for new drills. And this would be drilling at an angle, even worser. -- EA Stan |
#5
Posted to rec.crafts.metalworking
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Notching cast iron 4" drain pipe....
Existential Angst wrote:
I've got the "hub" part of a cast iron drain pipe accessible in a floor drain, and need to notch the lip, for the outlet of one of those li'l-giant-type centrifugal pumps that I want to drop in. The side outlet of the pump sticks out past the diameter of the pump, ergo the need for a notch, since it's a tight cylindrical fit. The notch needs to be about 1-2" long, mebbe 3/4" wide. Best way to cut? Regular metal cutting (sawzall), I think, are almost out of the question, as I've tried this on other CI drain pipe -- pert near impossible, without one of those coke-bottle cutting grit blades, which I didn't have.. I had to rent one of those "splitters", and even that was difficult. Would an abrasive sawzall blade do the job efficiently? Are there diff. types of sawzall abrasive blades? Woud I be better off grinding it out, with a 4.5" grinder, I spose. O/A seems to be a poor method, according to http://www.practicalmachinist.com/vb...t-iron-195329/ The reason being left-over graphite? Somewhere in he http://en.wikipedia.org/wiki/Oxy-fue...ng_and_cutting Plasma, air-arc seem to be OK, but, no gots. Idears? Grab an extended reach cut off tool and have at it. Something like this : http://www.eastwood.com/4-in-air-cut...d-reverse.html -- Steve W. |
#6
Posted to rec.crafts.metalworking
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Notching cast iron 4" drain pipe....
On Tue, 6 Nov 2012 12:21:03 -0500, "Existential Angst"
wrote: I've got the "hub" part of a cast iron drain pipe accessible in a floor drain, and need to notch the lip, for the outlet of one of those li'l-giant-type centrifugal pumps that I want to drop in. The side outlet of the pump sticks out past the diameter of the pump, ergo the need for a notch, since it's a tight cylindrical fit. The notch needs to be about 1-2" long, mebbe 3/4" wide. Best way to cut? Regular metal cutting (sawzall), I think, are almost out of the question, as I've tried this on other CI drain pipe -- pert near impossible, without one of those coke-bottle cutting grit blades, which I didn't have.. I had to rent one of those "splitters", and even that was difficult. Would an abrasive sawzall blade do the job efficiently? Are there diff. types of sawzall abrasive blades? Woud I be better off grinding it out, with a 4.5" grinder, I spose. O/A seems to be a poor method, according to http://www.practicalmachinist.com/vb...t-iron-195329/ The reason being left-over graphite? Somewhere in he http://en.wikipedia.org/wiki/Oxy-fue...ng_and_cutting Plasma, air-arc seem to be OK, but, no gots. Idears? Hardly a major mystery - a 1 mm cut-off wheel and a hand held grinder. -- Cheers, John B. |
#7
Posted to rec.crafts.metalworking
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Notching cast iron 4" drain pipe....
On 11/6/2012 12:21 PM, Existential Angst wrote:
I've got the "hub" part of a cast iron drain pipe accessible in a floor drain, and need to notch the lip, for the outlet of one of those li'l-giant-type centrifugal pumps that I want to drop in. The side outlet of the pump sticks out past the diameter of the pump, ergo the need for a notch, since it's a tight cylindrical fit. The notch needs to be about 1-2" long, mebbe 3/4" wide. Best way to cut? Regular metal cutting (sawzall), I think, are almost out of the question, as I've tried this on other CI drain pipe -- pert near impossible, without one of those coke-bottle cutting grit blades, which I didn't have.. I had to rent one of those "splitters", and even that was difficult. Would an abrasive sawzall blade do the job efficiently? Are there diff. types of sawzall abrasive blades? Woud I be better off grinding it out, with a 4.5" grinder, I spose. O/A seems to be a poor method, according to http://www.practicalmachinist.com/vb...t-iron-195329/ The reason being left-over graphite? Somewhere in he http://en.wikipedia.org/wiki/Oxy-fue...ng_and_cutting Plasma, air-arc seem to be OK, but, no gots. Idears? A die grinder and a Carbide burr. I HATE the shards it produces, wear protection and have a big magnet close by to catch some of them. BUT, you'll be don in two minutes. |
#8
Posted to rec.crafts.metalworking
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Notching cast iron 4" drain pipe....
I have removed cast iron toilet flanges by cutting slots with a 4-1/2"
grinder & breaking the iron between them. Is your "... 1-2" long, mebbe 3/4" wide ..." slot oriented horizontally or vertically? A 4-1/2" grinder wouldn't do a 2" vertical cut. Bob |
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