speeds and feeds for slitting with hss

[pimp215]

Why is it imposible for me or anyone I know to find any speeds and feeds
for milling a slot with a hhs slitting saw? Dose any one have a surface footage
for 1018 or a table for this type of cutting?

[pimp215]

spm=suface feet per minute;rpm=revoultions per minute

spmx4 then divide that # by your cutter radious =your rpms

I need to know what spm is on 1018 mild steel with a 3 inch diamiter .018 thousanths thick slitting saw.

[Mcgyver]

the texts will say 80-100 fpm for hss cutting mild steel, keep in the mind those figures are always under ideal conditions and should be considered a maximum. that number is the max surface speed for hss/mild steel, doesn't matter the cutter...ie same formula for figuring out the max speed for a drill for hss/mild steel.

[pimp215]

so a want the same rpms for a 1 inch dia. drill as a 1 inch dia. slitting saw?

[Mcgyver]

yes and no. surface speed is jus that, the max speed between cutter and work in say feet/min, and changes with material and cutter. spindle speed is determined by the surface speed + all other factors (setup etc) in theory if its hss into mild steel the surface speed is the same but there's other factors, how heavy is the cut, how rigid is the setup/machine etc. I'd run a slitting saw slower, but for set up reasons not because the max surface speed has changed consider getting a copy of machinery's handbook, and/or google maching feeds and speeds, or some machining texts its no problem answering some questions but you'd benefit from a deeper understanding as this stuff is core to metal working

here's a start

http://www.bitlady.com/speedfeed.php

here's another that i like cause I knew Robert

http://yarchive.net/metal/empirical_feed_rates.html

Robert Bastow "t-nut" was one of the most knowledgable and helpfull metal workers on the net imo, he's no longer with us but googling sometime churns up some of his delightfull tidbits

[tobyaxis]

Originally Posted by Mcgyver yes and no. surface speed is jus that, the max speed between cutter and work in say feet/min, and changes with material and cutter. spindle speed is determined by the surface speed + all other factors (setup etc) in theory if its hss into mild steel the surface speed is the same but there's other factors, how heavy is the cut, how rigid is the setup/machine etc. I'd run a slitting saw slower, but for set up reasons not because the max surface speed has changed consider getting a copy of machinery's handbook, and/or google maching feeds and speeds, or some machining texts its no problem answering some questions but you'd benefit from a deeper understanding as this stuff is core to metal working here's a start http://www.bitlady.com/speedfeed.php here's another that i like cause I knew Robert http://yarchive.net/metal/empirical_feed_rates.html Robert Bastow "t-nut" was one of the most knowledgable and helpfull metal workers on the net imo, he's no longer with us but googling sometime churns up some of his delightfull tidbits

Tidbits????? Thanks for sharing that link. Robert Bastow had a true love for the Trade. I enjoyed that and will share it with others.

Cheers!!!!!!

[jackson]

Originally Posted by Mcgyver yes and no. surface speed is jus that, the max speed between cutter and work in say feet/min, and changes with material and cutter. spindle speed is determined by the surface speed + all other factors (setup etc) in theory if its hss into mild steel the surface speed is the same but there's other factors, how heavy is the cut, how rigid is the setup/machine etc. I'd run a slitting saw slower, but for set up reasons not because the max surface speed has changed consider getting a copy of machinery's handbook, and/or google maching feeds and speeds, or some machining texts its no problem answering some questions but you'd benefit from a deeper understanding as this stuff is core to metal working here's a start http://www.bitlady.com/speedfeed.php here's another that i like cause I knew Robert http://yarchive.net/metal/empirical_feed_rates.html Robert Bastow "t-nut" was one of the most knowledgable and helpfull metal workers on the net imo, he's no longer with us but googling sometime churns up some of his delightfull tidbits

Robert Bastow "My hero" !!!!! That was the greatest thing i have read in awile i have a new bed time story LOL