The Three Different Types Of Thread Mills Explained: In The Loupe TV Ep. 8
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- เผยแพร่เมื่อ 6 ก.ค. 2024
- Do you know the key differences between the 3 different styles of Thread Mills? Do you know which tooling option is best for your job? Join the Cutting Tool Counselor, Don Grandt in episode 8 of In The Loupe TV to learn how to use the 3 different styles of thread mills and when to use each one.
Episode 7: • Thread Mills vs. Taps:...
"Confidently Select Your Next Thread Mill" Blog: www.harveyperformance.com/in-...
"Understanding Threads and Thread Mills" Blog: www.harveyperformance.com/in-...
"Multi-Start Thread Reference Guide" Blog: www.harveyperformance.com/in-...
Single Form UN Thread Fit Chart: harveyperformance.widen.net/s...
Single Form STI Thread Fit Chart: harveyperformance.widen.net/s...
In The Loupe Blog: www.harveyperformance.com/in-...
Harvey Performance Company: www.harveyperformance.com/
Harvey Tool: www.harveytool.com/
Helical Solutions: www.helicaltool.com/
Micro 100: www.micro100.com/
Titan USA: www.titancuttingtools.com/
CoreHog: corehog.com/
Keep making these videos.
Left hand cutting running spindle in reverse and top to bottom cut = climb milling from top to bottom
Your test was about the only think I knew already. I learned programing through reading other peoples programs. It has been interesting ordering tools, using CAM and creating fixturing. I am learning more now than I learned in the last 10 years of working for someone else. I bought a couple 4-40 tri-form treadmills because I broke about 6, 4-40 taps trying to tap some holes in 304 stainless. I got it to work on one part, but it broke on the very next part. I loved the bit on single form threadmills, i could spend $4000 or more on just all the different common sizes of threadmills.
Another application where I would be interested in a single form threadmill would be a lathe with live tooling. I would think that ,especially for deep, small threaded holes, this would have a good chance of really reducing deflection and chatter. Does that prove out in practice?
That is a perfect application for a single form Thread Mill. Lathes tend to be less rigid than Vertical and Horizontal Mills. Anytime you exceed that 2x diameter, especially in a lathe, look to single form 1st.
M3 spindle CW, M4 spindle CCW
Bingo!!!
CCW not CW
You sir would be correct!!
When can we use a thread mill without having to drill a hole first? Does that require different style thread mill than the ones you showed?
M4 and M3 are spindle rotation codes. M4 is counter clockwise
Learning all the time but I am not a machinist. What I do is only for the schools. Great videos.
Thanks Richard, Anything we can do to help educate. The machinist coming out of the trade schools are key to the success of this industry!
Thanks for your reply. I only wish that I could send you an email of all the things that I have designed and built for schools. I freely give away everything I can design and build and I have been awarded many times for this work in my retirement days. But when the eyes light up in a young child and I see that a spark of interest has been planted that is the best reward I could be given. I'll try reaching out to you on your web site.
@@richardwilliams5520 I did get your email and plan on replying to you soon. Thanks for sharing.
It seems to me a tri-form would only be useful in really hard materials. You still have to make every revolution of your entire thread, but now you've lost the flexibility of doing different pitches.
That said: I would bet in materials where wear is a significant issue, you could run a tri-form a lot longer before having to change it. Important for high production and lights out machining, especially.
I do have a couple of questions... chips will accumulate in the bottom of a blind hole, right? So going top to bottom could mean more recutting of chips. Does this require more 'dead space' at the bottom of the hole so you don't get into your chip pile? Do these come with thru coolant variants so you can flush the chips up and out of the hole more reliably?
Joshua these are some great questions that absolutely need to be considered when using a triform thread mill. First off, they are great for harder materials and any holes that have been work hardened for that matter. You get that natural spring pass to help chase the hole and get more consistency of your thread. The core is actually larger on these as well. To answer your other question. A blind hole has no issue with the chips because they will obviously drop through to the bottom of the part, but when it comes to blind holes you could have a chip pile at the bottom of your hole especially if you are in a vertical Machining center. I would one suggest a coolant through holder if you could help blast the chips out and second adding extra room at the bottom of the hole would absolutely help. Of course, chips are much smaller than with a tap so we are still minimizing our issues. Great questions and thanks for watching...
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Thanks for the nice word! Hope you learned something. Thanks for watching