Air drill speed

[Jwych]

Can someone give me the low down on what speed would be a good overall multipurpose speed ? Will use for drilling mostly aluminum and steel less than 1/2 thick.

 

[BFHtime]

Drill using a slow speed, use oil on the bit to keep it cool. Keep constant pressure, but not so much the bit bends or breaks. If doing multiple holes, relu e the bit to keep it cool. Just about any oil is fine, even spray lube.
Slow being not too fast, but not so slow you stall the drill. Go as fast as the bit can cut, while heating up the bit minimally.
A punch is nice to use to keep the bit from walking when starting.
God luck.

 

[LGMechanical]

400 rpm is standard for thick material.

 

[Jwych]

I guess I'm asking what speed to purchase. Some drills are 400 rpm free speed and some are 500 also have seen in upwards of 3k rpm. How do I choose a drill going by speed. Would I benefit from high rpm? Or would it be better to have one on the 500 range

 

[PBCampbell]

I can't say I've spent alot of time researching air powered drills but 1,000 rpms seems to be the slowest I've seen. Do you have any model numbers or links to these lower speed models?

 

[tbaggz]

High speed under 1/2,low speed above.has worked well for me.you can possibly add a regulator to control max speed.

 

[Jwych]

For instance this one is 500 rpm

Astro Pneumatic (AP 527C)

 

[tbaggz]

Use a 3/8 high speed,1/2 low speed.with aluminum it almost doesn't matter,with stainless steel it definitely matters due to heat.most important thing is use some oil to keep things cool.usually its a trade off of torque for speed.check out Sioux drills.they are the manufacturer of snap on drills and impacts http://www.siouxtools.com

 

[Jwych]

Does sioux not make a reversible 1/2in?

 

[tbaggz]

Yes an example is 5450r.

 

[larry_g]

The speed you need is determined by the material of the drill bit, the diameter of the bit, and the material being machines. here is a chart http://www.mr-skill.co.uk/wp/building-a-to-z/drill-speed-chart-metals that can get you started. It is for high speed bits.

With the information in your original post no one can answer your question because there is not enough information given. Makes a bit of difference if your drilling in the .100" range or the .750" range.

lg
no neat sig line

 

[Schurkey]

The speed you need is determined by the material of the drill bit, the diameter of the bit, and the material being machines. here is a chart http://www.mr-skill.co.uk/wp/building-a-to-z/drill-speed-chart-metals that can get you started. It is for high speed bits.

With the information in your original post no one can answer your question because there is not enough information given. Makes a bit of difference if your drilling in the .100" range or the .750" range.

THANK YOU.

Most drill motors are geared for too-high speed; when the trigger isn't pulled "all the way" the torque goes away along with the speed. In short, the drill motor becomes useless except with a 1/16" or similarly-small bit.

 

[Leaflessshadetree]

Judge by how the bit is cutting. The material should come off in spirals or large chips. Blue chips indicate speed too high. If you're making powder (the oil will becoming pasty) the speed is way too fast. The only problem with too slow of speed is that it takes a little longer to drill the hole.

 

[theknurl]

buy/download a copy of Machinery's Handbook it answers everything

 

[Astro_Pneumatic_Tools]

For instance this one is 500 rpm

Astro Pneumatic (AP 527C)

 

[Ign]

I'd get 500rpm over 400. For anything under, say, 3/8" 400 is too slow in a hand drill.