We do machining of 6Al4V titanium and use EM-TI taps from Greenfield.
Tapping titanium presents some unique problems compared to other materials. It has a tendency to spring back because of its extreme elastic memory. I believe the EM-TI taps have extra back taper and radial clearance to help...
Taking in to account that you have a rigid setup, coolant throught the spindle, and an accurate tool holder (ER collet or hydraulic chuck), then I would go with the "G" drill. This is a double margin straight flute drill that is designed for drilling and reaming in one pass. I would not look to...
The 303S is considered a "free machining" stainless. It has a machinability factor that is better than 304L or 316L. However, you will sacrifice corrosion resistance with this material. I recommend going with the 316L. You can spend a little extra on the material and buy from Carpenter. Their...
Hi punches,
I have had success in drilling 17-4 with the following drill from Guhring:
Series #329
Guhring has a .3858"(letter "W") in their book. It has 1.7" of flute length which will be fine for your hole depth. Start out at 450 rpm with a feed of 2.3 ipm. Do not use the pecking cycle as...
Hi Punches,
I have some experience with machining 8000 series alloy steel. I have found that Guhring makes a nice carbide drill for drilling this material. They have a coating called Firex that has a very high tolerance for heat. If you are able to introduce coolant through the tool on your CNC...
Hi Nitro,
Go with the following drill:
If it is 3xD go with Guhring series #5510
If it is 5xD go with Guhring series #5511
The drills have Guhring's Firex coating which kicks but in these types of steels.
Since you are drilling in to a convex surface you will want to reduce the feed rate by...
Yeah, Titex is a little cheaper but the quality difference between Guhring and Titex is drastic. I work for GE and we do a lot of drilling in my area and we have tested both. We tried Titex because it was a bit less in price. The Titex folks told me to run it at the same feeds and speeds as the...
we drill aluminum all the time. we machine 2024, 6061, and 7075 - all T-6. we use guhring drills exclusively. we have tried everyone else, but guhring has proven to be the best. for your application, i would recommend guhring's series #552 drill. this is guhring's GT80 parabolic flute drill. we...
this question is to be directed towards the machining population.
when it comes to drilling and holemaking in general, which company or companies stand out?
thanks
i really do not understand why you have to make something so simple so difficult.
with todays carbide and coating technology, selecting the right insert for the job has become easy. we machine several different types of material (inconel 625, 4140, 4340, hasteloy-x, 6061 aluminum, 1045...
yes mike, i want t use plugs. as you mentioned, the b.c.d is to close to the 40mm hole. what material would be best to make the plugs with? brass, copper.........?
i have an application on my welding robot where weld spatter has been a bit of a problem. we have two pieces that are welded together. we have a 12mm thick plate with a 40mm hole in it. this plate has four drilled and counterbored holes on 65mm bolt circle. we put a 40mm shaft inside the 40mm...
there may be some more variables at play here. are you actually measuring the hole after drilling to see if the drills are drilling the hole to the specified size? if not, you may want to check this.
are you drilling the hole using an alignment bushing? are you spot drilling the hole prior to...
