Threaded rodtools

If you are looking to hold a finish, you might slow feed down a little and make sure your reamer is indicated in to hold size. If you just need to hold size, feed as fast as possible.

All threadnut tool

I'm with Merlin and Tom on this one.... I start at 800-1000rpm and 10-15 IPM feed with coolant. Hell, I start at that with SS.

Dewaltall threadCutter

The reason for faster reaming feeds is so that the top of the hole won't bell mouth if you have a little runnout, the reamer will follow the hole.

Tool is HSS and work piece material is some kind Mild Steel.Its not too hard. Drilling was pretty easy using HSS drill bit Its a table to be used for a welding robot.

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Threaded Rod Cutter

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I'd start at 600rpm / 5ipm to start with for a 4-flute reamer, cooled, and work upwards from there. Better to start slow and work up than to start fast and scrap parts.

Likewise, the rule applies to feed as well. Slow the feed down some, hole is bigger. Kick the feedrate up, hole is smaller.

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All threadcutter

All ThreadWrench

Threaded rod Wrench

I used 1000 rpm for drilling. Should I go faster than 1000 rpm since Reaming is a finishing operation? Also what about the feed, I used 5 inch per min feed for drilling.

I have to Ream a piece of steel table on a CNC HAAS machine. What would be the ideal speeds and feeds for Reaming a 5/16 hole 1.2 inch deep.

Lower RPM will give smaller hole, higher RPM will cut bigger as a general trend. I would run that part at 250 RPM and 8 IPM and liberal cutting oil....(reamers have more cutting edges than a drill)

I am old school too, I would use 200 rpm % 2.500imp..... old timers always said you should be able to see the flutes while it's turning.

I'd go slower on reaming than on drilling since its finishing and you don't want to generate much heat. But then again you're taking off so little that might make up for it.

If all else fails, and the hole is still small (and you don't have or can get a bigger reamer), then 'tickle' the reamer.