Sharpening router bits. - Router Forums
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post #1 of 15 (permalink) Old 05-07-2017, 06:23 AM Thread Starter
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Default Sharpening router bits.

Do you sharpen your router bits? All router bits can be sharpened by DIY'ers but for those bits that can be sharpened at home it seems like a good idea but like a lot of thing it could be just something to sell more stuff. They have been pushing some products made by Trend. For around $50 you can get a small credit card style 600 grit diamond stone and a small bottle of lapping fluid.

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post #2 of 15 (permalink) Old 05-07-2017, 08:11 AM
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I'll sharpen em as needed. Can't say I get "like new" results, but definitely an improvement more often than not. If you have a bit in need of sharpening it in all likely hood is in need of a thorough cleaning as well. Clean the bit first! Pitch/gum will foul a diamond stone in a heartbeat then the sharpener is in need of a cleaning. Some folks swear by doing a brief "touch-up" after each use.....I guess that's up to the individual.
How often you need to touch up your bits depends on any number variables. Amount of use, feed rates, materials etc. etc...



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post #3 of 15 (permalink) Old 05-07-2017, 08:42 AM
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Diamond cards and other "fine" touch up tools have been around for years. I've used them for bits (drill & router), carving tools, chisels, turning tools & etc. The advantage is they take off very little of the steel or carbide. I agree with Bill: clean them first and at when a "touch up" turns into grinding the tips replace them.
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post #4 of 15 (permalink) Old 05-07-2017, 12:25 PM
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Which work better/easier, the card type or the file type diamonds?
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post #5 of 15 (permalink) Old 05-07-2017, 02:15 PM
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I use the 2 x 4 or 5" plastic backed diamond hones and I find it easiest to lay it down on the edge of a table or bench and rub the bit across it.

Someone I consider a master woodworker once told me that a master woodworker is not someone who never makes mistakes. He is someone who is able to cover them up so that no one can tell.
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post #6 of 15 (permalink) Old 05-07-2017, 02:43 PM
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Quote:
Originally Posted by old coasty View Post
Which work better/easier, the card type or the file type diamonds?
The diamond 'card' style are a little easier, since they fit the smaller bits better. I have a set of the DMT diamond whetstones but they are too thick for some bits.

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post #7 of 15 (permalink) Old 05-07-2017, 03:20 PM
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what they said...
Attached Files
File Type: pdf Care and Sharpening of Router Bits.pdf (2.21 MB, 105 views)
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post #8 of 15 (permalink) Old 05-08-2017, 12:21 PM
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Yes, there are hand sharpening devices.
& with skilled hands they work, but for a limited time.
In production, a tool is hit on the OD, flute faces, tips and many other places depending on the geometry of the tool. Even reputable sharpeners cannot compete with quality of a new cutter. Router bits are essentially disposable today. Replaceable insert bits, if you can afford, is the best buy.
Moreover, the inserts are much harder than brazed-on carbide, and last up to 5x longer.
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post #9 of 15 (permalink) Old 05-08-2017, 02:54 PM
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I wouldn't even think of trying to resharpen a router bit myself. I can resharpen about anything else, and do a better than decent job, but no way I could do even a halfway decent job on a router bit. I toss them when they get dull, and buy new.

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post #10 of 15 (permalink) Old 05-08-2017, 03:42 PM
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Diamond cards or the flat file type diamond sharpeners were never intended for "heavy" sharpening. More along the line of "honing" an edge. If it is so dull that you need to grind a new edge toss it and buy a replacement.
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