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Forum topic by RMP posted 1272 days ago 1330 views 0 times favorited 4 replies Add to Favorites Watch
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RMP

51 posts in 1749 days


1272 days ago

Hey LJs , I have a question about cutting brass. I know it can cut fairly easy on a table saw, but I have had a project rolling around in my head for a while that requires a rabbit cut into a piece of 3/8” thick brass , round, about 2” dia. What I’m wondering is if i can cut it with a router bit without destroying the bit. They’re not cheap as you all know and I don’t have many. If any of you guys have any thoughts on this I would greatly appreciate it. Best thoughts. RMP…....


4 replies so far

View horologist's profile

horologist

93 posts in 2343 days


#1 posted 1272 days ago

With the right blade you can cut brass nicely on a bandsaw. For small pieces it is hard to beat a piercing saw and a bench block. I would never recommend a tablesaw. Similarly I know of people experimenting with routers to cut out brass clock plates, I’m not convinced this is a good idea.
If you only have a small quantity of brass to cut I would recommend farming the task out to a local machine shop, much cheaper than hospital bills and replacing damaged tools. If you are going to be cutting a lot of metal then perhaps it is time to invest in a small mill, a Sherline would be worth investigating.

-- Troy in Melrose, Florida

View TopamaxSurvivor's profile

TopamaxSurvivor

14618 posts in 2280 days


#2 posted 1272 days ago

I would farm it out or use a file and hack saw.

-- "some old things are lovely, warm still with life ... of the forgotten men who made them." - D.H. Lawrence

View Viktor's profile

Viktor

447 posts in 2022 days


#3 posted 1271 days ago

1. Secure the piece.
2. Use lowest RPM and small diameter bit. At 12000RPM and 5 mm diameter you get about 3m/sec linear cutting speed. It is still too high for non-ferrous metals but OK.
3. Use small increments (1 mm or less).
4. Use guide, don’t rout free hand.
5. Cool and lubricate with oil.
6. If doing larger amount of cutting invest in specialty bit. Wood bits angle is to sharp for metal and cause grabbing, that’s why #1, 2, 3, and 4 are important.

View Dan Lyke's profile

Dan Lyke

1469 posts in 2729 days


#4 posted 1270 days ago

I’d find someone who has a milling machine, and do it that way. My mill runs way way slower than my router, and the bit is open and accessible to add water and to watch the waste material’s color to see when it’s getting too hot.

Unfortunately, you’re on the other side of the country from me.

-- Dan Lyke, Petaluma California, http://www.flutterby.net/User:DanLyke

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