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+-- Thread: Spiral router bit kickback (/showthread.php?tid=7346243)
RE: Spiral router bit kickback - Stwood_ - 02-06-2019
CNC does use bearing patterns bits. Read the description on this one.
https://www.amazon.com/Proburs-Straight-Diameter-Laminate-Template/dp/B07BF8PSPL
Use on CNC and other automatic routers as well as hand held and table mounted portable routers.
RE: Spiral router bit kickback - Stwood_ - 02-06-2019
When I buy flushtrim bits, I try and get the 2-flute shearing bits. The carbide cutters are set at a slight angle, and produce a nice cut.
For instance (different size than OP is using)----> https://www.amazon.com/CMT-806-690-11-Super-Duty-Cutting-Carbide-Tipped/dp/B000K29S5G/ref=asc_df_B000K29S5G/?tag=hyprod-20&linkCode=df0&hvadid=312003160272&hvpos=1o2&hvnetw=g&hvrand=4087098856622705252&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=200619&hvtargid=pla-568656126653&psc=1
RE: Spiral router bit kickback - OldGuyDrummer - 02-06-2019
(02-06-2019, 03:53 PM)Stwood_ Wrote: CNC does use bearing patterns bits. Read the description on this one.
https://www.amazon.com/Proburs-Straight-Diameter-Laminate-Template/dp/B07BF8PSPL
Use on CNC and other automatic routers as well as hand held and table mounted portable routers.
I have a CNC machine and bearings on bits simply have no use.
The servo motors on the three (four) axis determine the path of the bit via the software you use to program the path of the bit in the X, Y and Z axis.
Unless the CNC had some magic sensor in the shaft on a super high end machine to give a feedback loop that the bit is or is not touching something it has zero use on a CNC.
None of the CNC machines that I have looked at in the under $50k has anything like this. And something in that upper range or greater is not going to be using standard router bits but most likely something closer to an end mill.
The description in Amazon is from a person that knows nothing about CNC machines or simply is re-using the same general description for all their router bits.
RE: Spiral router bit kickback - FS7 - 02-06-2019
(02-06-2019, 06:08 PM)OldGuyDrummer Wrote: I have a CNC machine and bearings on bits simply have no use.
The servo motors on the three (four) axis determine the path of the bit via the software you use to program the path of the bit in the X, Y and Z axis.
Unless the CNC had some magic sensor in the shaft on a super high end machine to give a feedback loop that the bit is or is not touching something it has zero use on a CNC.
None of the CNC machines that I have looked at in the under $50k has anything like this. And something in that upper range or greater is not going to be using standard router bits but most likely something closer to an end mill.
The description in Amazon is from a person that knows nothing about CNC machines or simply is re-using the same general description for all their router bits.
Well, I don't have a CNC machine, but it's pretty obvious that a top-bearing flush trim bit would be more or less useless, while a bottom-bearing flush trim bit would be usable but the bearing itself would be totally useless. I don't think anybody would argue with you.
I think it's apparent that in certain cases they can be used, but they're at best equivalent to non-bearing bits.
RE: Spiral router bit kickback - EricU - 02-06-2019
my experience with cnc is with metal mill and lathe. But I'm pretty sure the bearing would just increase the probability of breaking the bit.
RE: Spiral router bit kickback - FS7 - 02-06-2019
Here's a guy taking off a substantial amount of maple with an almost identical Whiteside bit:
https://www.youtube.com/watch?v=AtTcrCQAnmA
There has to be something wrong with mine. I cannot fathom how mine could be so bad.
RE: Spiral router bit kickback - KyleD - 02-07-2019
(02-06-2019, 10:27 PM)FS7 Wrote: Here's a guy taking off a substantial amount of maple with an almost identical Whiteside bit:
https://www.youtube.com/watch?v=AtTcrCQAnmA
There has to be something wrong with mine. I cannot fathom how mine could be so bad.
Provided you are feeding into the rotation of the bit and using a starting pin, both of which Handi showed on that video, you should be getting the same feed results. I really cannot imagine how the bit can get away from anyone routing correctly no mater how aggressive.
Is the bit grabbing or pulling large chunks out of the piece being routed?
Can you not physically stop the router from pulling the piece backwards? this could cause what you describe. if this is the case are you sure your work holding system is strong enough to keep a proper grip on the piece?
RE: Spiral router bit kickback - iublue - 02-07-2019
(02-06-2019, 10:27 PM)FS7 Wrote: Here's a guy taking off a substantial amount of maple with an almost identical Whiteside bit:
https://www.youtube.com/watch?v=AtTcrCQAnmA
There has to be something wrong with mine. I cannot fathom how mine could be so bad.
I have two of those bits and use them all the time. I can't imagine why you are have a problem because I love mine and have never had a problem.
If you want to get rid of yours, I would be interested.
RE: Spiral router bit kickback - FS7 - 02-07-2019
(02-07-2019, 08:55 AM)iublue Wrote: I have two of those bits and use them all the time. I can't imagine why you are have a problem because I love mine and have never had a problem.
If you want to get rid of yours, I would be interested.
I'm going to try again, but I can't fathom why it would be so bad. I can return it to Amazon for a full refund so I'm going to do that if that's what I decide to do.
RE: Spiral router bit kickback - Cooler - 02-07-2019
(02-07-2019, 09:50 AM)FS7 Wrote: I'm going to try again, but I can't fathom why it would be so bad. I can return it to Amazon for a full refund so I'm going to do that if that's what I decide to do.
Write to (or call) Whiteside for advice.
https://www.whitesiderouterbits.com/pages/contact