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| Router marks on maple http://mowrystrings.luthiersforum.com/forum/viewtopic.php?f=10101&t=15909 |
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| Author: | SteveC [ Thu Feb 14, 2008 10:01 pm ] |
| Post subject: | Router marks on maple |
Greetings, While sanding a maple top (electric), I noticed some dark marks where the quarter round was located. I think the marks may have been made by the quarter round router bit as it passed. The marks are located mainly on the end grain, and don't sand away. The marks are not usually visible until a solvent such as naptha is applied. Any ideas on the removal of these marks before finishing? Regards, Steve |
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| Author: | Kirt Myers [ Fri Feb 15, 2008 8:55 am ] |
| Post subject: | Re: Router marks on maple |
I would think some coarser sandpaper and some more elbow grease. Got any pictures? |
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| Author: | SteveC [ Fri Feb 15, 2008 9:36 pm ] |
| Post subject: | Re: Router marks on maple |
Kirt, Thanks for your comments. Attached is a photo ( somewhat poor though ). I went the route you suggested. But, I stopped when the quarter round was no longer round. I guess the " burn " is deeper that I expected. Steve |
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| Author: | Rich Schnee [ Fri Feb 15, 2008 10:03 pm ] |
| Post subject: | Re: Router marks on maple |
You could sand the top down about 1/32” through a drum sander and then re-rout the edge. Are you using Carbide or high speed steel bits? My preference is high speed steel over the carbide bits. They hold a sharper edge and tend to burn less but they just don’t last anywhere near as long as carbide. I use the carbide bits for general work and save the HSS bits for the critical work. Toss them when they dull. |
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| Author: | SteveC [ Mon Feb 18, 2008 7:22 pm ] |
| Post subject: | Re: Router marks on maple |
Hello Kirt and Rich, Thanks for your help. You've given me some ideas to work with Steve |
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| Author: | Bob Garrish [ Mon Feb 18, 2008 8:52 pm ] |
| Post subject: | Re: Router marks on maple |
Yeah, looks like you'll need to either feed that puppy a lot faster or use a bit with a bearing instead of a shank guide. End grain tends to burn worse. |
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| Author: | Brett L Faust [ Tue Feb 19, 2008 12:55 am ] |
| Post subject: | Re: Router marks on maple |
Have you tried raising the grain then re sanding? |
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| Author: | SteveC [ Tue Feb 19, 2008 8:14 pm ] |
| Post subject: | Re: Router marks on maple |
Bob, I used a Freud round-over bit with bearing, although it has been used a fair amount. The speed is not controllable on my "antique" Craftsman router. (Might be time to get a new tool ;o). Brett, I didn't try your suggestion. I'll give it a try. Thanks for your help, Steve |
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| Author: | WaddyThomson [ Tue Feb 19, 2008 10:48 pm ] |
| Post subject: | Re: Router marks on maple |
Or a Harbor Freight Router Speed Controller. On Sale now: HERE |
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| Author: | Mattia Valente [ Mon Feb 25, 2008 6:55 am ] |
| Post subject: | Re: Router marks on maple |
Always, always check the bearing turns smoothly before using, and like Bob said, adjust the feed rate. Not the speed the bit spins at, the speed you move the router over the workpiece. Better to do a few relatively brisk passes, lowering slightly each time, than hogging off everything in one go, having the motor bog down (it shouldn't slow at all), and/or leaving it in place for too long. If it burns with a bearing, the bearing's not moving smoothly enough; ideally it should remain stationary on the workpiece while the bit spins inside it. |
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| Author: | SteveC [ Mon Feb 25, 2008 9:05 am ] |
| Post subject: | Re: Router marks on maple |
Mattia, I think that may be the way to go. I did the round over in one pass. Next time, I will make gradual cuts. Thanks for the comment(s). Steve |
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