Thanks: 0
Likes: 0
Needs Pictures: 0
Picture(s) thanks: 0
Results 1 to 11 of 11
Thread: Routing rebate in Tassie Oak
-
6th January 2007, 09:34 PM #1
Routing rebate in Tassie Oak
Hi,
I'm having problems routing a rebate in some Tassie Oak.
I am using lengths of 42 x 19 mm (for a door frame) and am trying to route a rebate 6 x 13 mm. When I set up my router table and practiced with radiata pine, all was well, but when I moved on to the real wood, the router keeps catching and pulling out small chunks (in the yellow area in the diagram). There is also a photo but it's difficult to see the area in question.
I tried nibbling off smaller amounts of wood each pass but had the same problem.
I tried with a new router bit (Timbecon Torquata 12mm straight) - same problem.
Any suggestions?
Is this what I should expect with Tassie Oak?
Would orientating the wood 90 degrees on my router table make any difference?
Tony
-
6th January 2007 09:34 PM # ADSGoogle Adsense Advertisement
- Join Date
- Always
- Location
- Advertising world
- Posts
- Many
-
6th January 2007, 09:38 PM #2
You could try turning the timber the other way so it is standing on edge.
This may mean you would have to move the fence each time rather than just raise the bit but if it fixes your problem I am sure you won't mind.
Cheers, Jack"There is no dark side of the moon really. Matter of fact it's all dark."
-
7th January 2007, 07:33 AM #3
Your'e right. It's really hard to pick up from the pics, but at a guess it looks like you may be going against the grain. Perhaps try the 90 degree thing, smaller cuts with several passes, try to orient the grain to avoid the tear out, adjust bit speed, adjust fed speed, swear like a sailor, try spiral upcut bit, it will give a cleaner cut.
Just a few ideas from a cavemanBoring signature time again!
-
7th January 2007, 09:12 AM #4
Outbacks right on,
You're cutting aganst the grain.
or it is curly grain.
-
7th January 2007, 03:17 PM #5
tony - just looking at the picture - are you sure you are feeding it through in the right direction?
sorry, if this is stating the obvious - but I notice the 'bounce' in the cut in the photo - tassie oak should cut much smoother than this
if that's not the problem, you could also try a first pass at full height, but only taking off a couple of mils - then start taking off the rest by moving the fence away and dropping the router down - thenworking up into the rebate
jas"... it is better to succeed in originality than to fail in imitation" (Herman Melville's letters)
-
7th January 2007, 04:54 PM #6
Thanks for your replies.
I hope I'm feeding the stock the right way: right to left across an inverted router.
I rotated the wood to feed it through on its edge and that got rid of the breakout on the edge about which I'm concerned ('cos it's on the face of the door). It still tended to tear the rear edge but I followed Jas' advice and made the first pass really shallow at full height and then proceeded in much smaller increments and now it's a lot better.
One problem was that my idea of taking off smaller amounts of timber was still too aggressive. I thought 3 passes of 4mm would have been OK but now I see that the direction the bit is spinning will always tend to push the edge away from the stock on the edge closest to the blade - espaecially on deeper cuts. Using 1mm increments at a time works a lot better.
Incidentally, is a 12mm straight bit the best to use for this task or should I use a larger diameter?
Now off to Bunnies to replace all the Tassie Oak I've ruined
Tony
-
7th January 2007, 08:07 PM #7
Is there any support above the cutter or open air?, ideally in this situation you get as much zero clearance as possible.
Make an sacrificial fence and push the cutter through it at the needed set height and then use a feather board to hold the stock against the fence.....................................................................
-
7th January 2007, 10:54 PM #8
Harry,
I see what you're saying. I do have a fence with a hole in it but the hole is not punched through by the bit - just a large square hole to cater for all my bits. So effectively there is air next to the wood that is being attacked by the bit as the blade leaves the stock.
Unfortunately I'm using a home-made router table which is fiddly enough at the moment with lots of clamps to loosen/tighten whenever I move the fence. I can see it getting even more time consuming if I follow your (correct!) advice
Maybe it's time to start thinking of a building a better fence + fence control mechanism...
Tony
-
8th January 2007, 12:27 AM #9SENIOR MEMBER
- Join Date
- Nov 2006
- Location
- t
- Posts
- 961
Have severe probs with tearout on Tassie Oak box, ended up with zero tolerance fence and sacrificial wood clamped on outer edges to fix it.
Wasted a lot of wood before it finally came rightLast edited by Cruzi; 8th January 2007 at 12:29 AM. Reason: Wrong smiley
-
8th January 2007, 12:53 AM #10
I would suggest a better quality router bit, as well as taking stock of all the good advice given so far.
Don't use the timbecon bit, they are cheap like the archer and carbatec bits, go for a quality bit - I found that after upgrading my router bits to CMT and carbitool I minimised a lot of tearout, this is based on my experiences with the tassie oak I got from Lazarides in Brisbane.
This should help but may not be the only answer.
Unfortunately tassie oak does have a tendency to tear and splinter.
Also, you should find a local supplier as bunnies are expensive for tassie oak/vic ash.
Good luck.
-
8th January 2007, 10:35 PM #11
What? Tear out on Tassie oak? No way, must be Vic mountain ash!
If you can do it - Do it! If you can't do it - Try it!
Do both well!
Similar Threads
-
Three problems in one post
By keith53 in forum WOODTURNING - GENERALReplies: 28Last Post: 7th June 2005, 12:48 PM -
Help - Tassie Oak
By Soren in forum FINISHINGReplies: 10Last Post: 26th May 2005, 10:08 PM -
Finishing Tassie Oak
By Arron in forum FINISHINGReplies: 15Last Post: 29th June 2003, 06:11 PM -
Tassie Oak
By grichting in forum FINISHINGReplies: 7Last Post: 3rd December 2000, 01:55 PM