Cutting into a chimney

[Pikeslayer]

Im putting in a wood stove and I need to cut a hole in the flue.This is an old chimney so Im sure the flue is very brittle!Im thinking of useing a Dremel tool but Im open to any other ideas before I start! Thanks!!

[fastkaw]

What is the chimney made of?

Brick,Stone, Metal? Is the chimney lined? Clay tile.?

[jltimm]

Use a diamond blade on a 4" grinder or a chop saw with a diamond blade.

[sparcebag]

If ya make a jig the dremmel will work,I have used a router with a collar 1/8 fluted bit take out a little material 1/8 deep then another pass at 1/8 till through.The flue can crack easily so take your time.The jig helps to hit the same cut and stablize the tool.

By the way How'd ya cut the brick,block??

[Pikeslayer]

I cut the brick with a 3/16 cememt bit by making a cut every 1/4" for a grand total of 54 holes (thats 216" of drilling though solid brick with no hammer drill!)Like I said the chimney is old and brittle so I took my time.I like your idea of a 1/8" deep at a time,that sounds like a good way to go!Thanks! If I dont hear of any other ideas Ill try that and let you know how it works!

[BobT]

Will this chimney also be used for other fuel sources? Might want to be careful here. Wood exhaust is usually best to have its own chimney I believe.

Bob

[Pikeslayer]

No, the chimney will only be for wood,Im tired of buyin fuel oil at the prices they want today.So Im going with wood and electric!