Feb 19, 2019 — I'm looking for a backside chamfer tool for a .250 and a .125 hole in inconel. Any good suggestions for such a tool?

Single pointthread mill speeds and Feeds

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ThreadMilling Calculator

I believe you are telling me that there is no relationship between the feed rate on the TOOL PAGE (x&y motion)and the thread pitch (z motion)on the THREAD MILL page. I think this is what was confusing me the most.

I also found the FPM recommendations in the book and I chose the lowest value and will work from there. A lot of you guys scare me witless with the feeds and speeds you use. I can just imagine the shrapnel flying through the air!

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your insert has 6 teeth and your thread is 10 teeth deep. The insert will have to make 1.5 full circles to machine the thread. What you are seeing

Thread mill feeds and speedspdf

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[3] I am using a VARDEX TMMC100-4 124/202 holder which has an effective diameter of .71". The insert has 6 teeth. I had to create a new tool, and it is possible that I have not correctly defined the tool.

If you are driving nails on the painted wall, stick adhesive tape on the wall before driving. This is to prevent the surrounding paint from shaking down when driving nails.

My take is multiply the rpm by 25% - you are effectively using six teeth in this cut. It's sort of like over-revving a dovetail cutter in steel.

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When driving a nail on a hard object, you can dip the tip of the nail with something as lubricating as soap and butter in advance. This is to save effort.

Thread mill feeds and speedschart

THE BIG QUESTION: How do I calculate the feedrate for the TOOL PARAMETERS page? I have come up with values ranging from .11811ipm to 250.98ipm.

EndMill speeds and feedscalculator

Well Jack use to do Stainless Steel at 450 Sfm using a much smaller cutter like one for 1/4 npt and never had any problems. I understand your concern about Naval Brass beign tough but I use to cut it like I was cutting Carbon Steel and never had any problems. I would rough all Carbon Steel at 690-980 SFM then usually finish at 1200 to 1600 SFM. But I always use carbide.

Machining Calculators - Cutting Speed and Spindle Speed · Cutting Speed equals pi X part Diameter x spindle speed divided by 1000. Cutting Speed Calculator · feed ...

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Again thanks to all of you for your replies, I knew I could count on you. It just makes me feel bad that I am unable to offer any advice to others.

The feedrate in x and y have no effect on the pitch of the thread. You can feed it as fast or slow as yoy want. As long as you helix is programmed right you'll get a 3mm thread.

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Millingspeeds and feedsChart

I think you have cleared up what has muddled my thinking. You stated "the feedrate has no function in forming the thread in threadmilling. You treat it like a one flute endmill".

Now here is another question. My thread is 1.181" deep. When I run the process in backplot, it looks like it makes 2 different helixes at different depths in the part. Is this normal? I don't see any parameters on the THREAD MILL page that would change the number of cuts.

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Harvey Toolspeeds and feeds

Tungsten carbide rods are made to meet the highest standards of quality. They are an excellent product for making your cutting tools.

Well You are apporaching it the right way. I have been threading milling for about 10 years now and blow most people mind when I do it. I think you will enjoy the way mastercam does it. It makes it very easy. I think my name suits me when it comes to doing anything. I feel that push till it break and the back 5% si where i always want to be. I think turing 4150 HT at 900 sfm with a .250 perside cut at .028 feed per rev is safe so all relative to what you have seen.

I'm assuming your insert has 6 teeth, but only 1 flute (cutting edge). I don't know how deep this trapezoidal thread is, but based on a .002 feed per flute your rpm @390 SFM is 2100 and your feed rate is 4.2 ipm. That sounds like a reasonable place to start.

If the original nail on the wall is loose, first pull it out, then plug a small wooden stick of similar thickness into the nail hole, and then drive the nail in, so that the nail is firm.

RE Millman^crazy comments: I do have the feed table in my Vardex book, but I think I was confusing the feed rate (along the cutter path) with the rate the spindle was moving in the Z axis to make the helix.

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Thread mill feeds and speedscalculator

There should be a formula is your Val Book I have them in my Vardex Book. But sound slow to mena I would problay be at like 650 SFM but I like it balls to the wall though. Gcode is correct if you were using a single point tool then you would just need more passes is all.

Before nailing, find a piece of wood and put it between the nail and the wall. If there is no wood, you can fold the waste paper several times. The purpose of this is to prevent the nail from bending when it is driven into the wall.

There’s also a trick in hammering nails. At the beginning of the knock, use the flat end of the hammer, so the speed will be faster. When it comes to the wall, use the round end to prevent the hammer from leaving marks on the surface of things.

The above is the difference between the commonly used cement nails and steel nails, as well as some tricks in daily life, hoping to bring help to you.

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I look at this way if you can get 1000 holes threaeded in 10 sec a holes and the insert cost you $45.00. If you charge $75.00 an hour shop rate then it cost you $.21 a hole. Now you take 1 min a hole to thread it at the same shop rate it will cost you $1.29 a hole to do the same thing. That mean a difference in just the threaeded holes of almost $1000 I think I will keep doing it balls to the wall and put that $1000 in my pockey.