Cobalt drill bits are good
High Speed Steel aka HSS
Drill bits can be made from steel which is a mxture compriing mainly of iron. Many drill bits are coated with a very hard yellowish chemical compound titanium carbide. (made of titanium and carbon)
The drill bits used to drill steel come in different colors. The packaging will indicate what materials can be drilled.
My favorite is simply a high speed steel drill bit, running at SLOW speed (slower than you'd run if drilling mild steel) using green goo as a lubricant called "Westlube" made by Westland Products Company. http://www.westlandproducts.com/ In our operation Westlube changed things from 2-3 holes per drill bit to hundreds of holes per drill bit. For stainless, it's purely magic!
Drill bits can be made from steel which is a mxture compriing mainly of iron. Many drill bits are coated with a very hard yellowish chemical compound titanium carbide. (made of titanium and carbon)
Yes, mortising bits are made for drill press use.
They are used in bits that cut stone or tile.
Stainless steel can be used for manufacturing tablet punch.
No. Stainless Steel will resist contamination from the aluminum when they are used together.
When I had a large shop I used to have 3 racks on the wall behind the bench drill press, one for standard drill bits, one for specialist drill bits and one for hole saws, Forstner bits and fly bits.
coat
309 stainless steel welding rod used to MS to SS 308 stainless steel welding rod only used to SS