Timeline for How did I bend this router bit? What safety or operating step did I miss?
Current License: CC BY-SA 4.0
20 events
| when toggle format | what | by | license | comment | |
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| Apr 23, 2021 at 14:04 | answer | added | Wsander2 | timeline score: 2 | |
| Aug 28, 2020 at 18:11 | vote | accept | codyThompson | ||
| Aug 28, 2020 at 18:04 | comment | added | codyThompson | @Puddles I did :) | |
| Aug 28, 2020 at 18:04 | comment | added | codyThompson | @jdv Thanks for the link! I definitely looked in a few different places for a max RPM before running this, but alas, found none. | |
| Aug 20, 2020 at 13:00 | answer | added | LeeG | timeline score: 5 | |
| Aug 19, 2020 at 23:19 | comment | added | Puddles | I hope you left a ZERO star review warning others away! | |
| Aug 19, 2020 at 15:50 | comment | added | user5572 | Apropos: woodworking.stackexchange.com/q/2942/5572 (Even though this looks like a manufacturing flaw, the fact is that large diameter, large mass cutters need to be run slower. Good manufacturers will tell you the max RPM for each tool they sell [or tool size]). | |
| Aug 19, 2020 at 15:43 | vote | accept | codyThompson | ||
| Aug 28, 2020 at 18:11 | |||||
| Aug 19, 2020 at 14:40 | answer | added | blacksmith37 | timeline score: 2 | |
| Aug 19, 2020 at 6:26 | comment | added | Graphus | of other bits, of various price points — what the ideal heat treat for a shaft like this actually is. Our gut feeling of where the heat treat should land (i.e. the temper colour) might be way off, somewhat similar to conventional screwdrivers which were tempered much softer than most imagine (blue, not tan or brown). Now all this aside, the ideal running speed for a bit of this size is slow, since the large diameter means the edge is moving very much faster than on a smaller bit. And with a 1/4" shaft I would always err on the side of caution anyway, because of the potential for overloading. | |
| Aug 19, 2020 at 6:19 | comment | added | Graphus | Hi, welcome to Woodworking. Yikes! I hope you were wearing your brown pants yesterday ^_^ While I share some of the reservations about the bit type (specifically, large diameter, narrow shaft) I'm not so certain 'better' heat treating would have been desirable here. While the damage to the base is unfortunate I feel a snap, followed by the bit being ejected at a tangent at about 100mph might have been slightly less desirable! I feel the important point re. the bit itself and its mode of failure was that we can't know — without unequivocal knowledge of failures [contd] | |
| Aug 19, 2020 at 0:56 | comment | added | codyThompson | I'm happy to accept an answer along the lines of: "Combination of poor quality shank and wide bit for 1/4" shank" If either of you would care to post one. Otherwise I'll post it myself tomorrow. Thanks for the insight!!!! | |
| Aug 19, 2020 at 0:53 | history | edited | codyThompson | CC BY-SA 4.0 |
I tried to bend the offending router bit with a vice and socket wrench. It bent so I added pics and a video.
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| Aug 19, 2020 at 0:40 | comment | added | codyThompson | @blacksmith37 It bent pretty easily in a vice (please pardon my crude workbench). I think you're on to something. I don't know if it will be a relief or scare me even more to know that it might've been an equipment failure rather than an operator error. I'll definitely be staying away from cheap and oversized router bits from now on. | |
| Aug 19, 2020 at 0:03 | comment | added | blacksmith37 | Wild guess after reading review of the other failure also :The steel shaft was not heat-treated and is soft. At the very high router RPM a slight imbalance causes bending stress. This guess could be tested with the cutter in a good vise and trying to bend the shaft with a large pliers or other tool . The fact that presumably a very hard shaft bent as much as shown is suspicious. | |
| Aug 18, 2020 at 23:59 | comment | added | codyThompson | haha I see. So maybe I should stick to smaller and higher quality bits. | |
| Aug 18, 2020 at 23:57 | comment | added | SaSSafraS1232 | Yeah, I would not want to be anywhere near a 2" router bit on a 1/4" shank that only cost $16. Especially if it was spinning! | |
| Aug 18, 2020 at 23:02 | history | edited | codyThompson | CC BY-SA 4.0 |
added 53 characters in body
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| Aug 18, 2020 at 23:00 | review | First posts | |||
| Sep 1, 2020 at 22:56 | |||||
| Aug 18, 2020 at 22:54 | history | asked | codyThompson | CC BY-SA 4.0 |