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post #1 of 16 (permalink) Old 10-04-2010, 03:08 AM Thread Starter
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Default Bad day at black rock

......or.....spiral up cut bit makes great snapper sinker!......OK...heres the story...pull up a chair kiddies and get comfy....For some time I have deliberately stayed away from using my O/P box joint jig as I know nothing about the deal....save for the video and written instructions. I am making a blanket box for my great grand daughter which require two smaller boxes on rails just below the lid. Instead of making the sides and ends as a box joint I thought I would try a simple joint for starters. See photo 09...it was made from scrap and I was quite pleased with the result.
I then started on the fair dinkum ones and this is when the drama started. Same 3/8 up spiral bit..same settings on router table but...the tear out was horrendous to say the least. I tried running the workpiece through in smaller increments but to no avail! The only possible thing I can think of is routing across the grain!..but even this dosent stand up.... I have been using a pushblock to try and curtail this but no better results..see photo 07 and 08...I have no idea as to what the timber is, but if things dont improve its back to the table saw and the 3/8 spiral will go to God!.........thank you for reading my rant....Regards.....AL
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post #2 of 16 (permalink) Old 10-04-2010, 04:14 AM
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Originally Posted by Al Robins View Post
......or.....spiral up cut bit makes great snapper sinker!......OK...heres the story...pull up a chair kiddies and get comfy....For some time I have deliberately stayed away from using my O/P box joint jig as I know nothing about the deal....save for the video and written instructions. I am making a blanket box for my great grand daughter which require two smaller boxes on rails just below the lid. Instead of making the sides and ends as a box joint I thought I would try a simple joint for starters. See photo 09...it was made from scrap and I was quite pleased with the result.
I then started on the fair dinkum ones and this is when the drama started. Same 3/8 up spiral bit..same settings on router table but...the tear out was horrendous to say the least. I tried running the workpiece through in smaller increments but to no avail! The only possible thing I can think of is routing across the grain!..but even this dosent stand up.... I have been using a pushblock to try and curtail this but no better results..see photo 07 and 08...I have no idea as to what the timber is, but if things dont improve its back to the table saw and the 3/8 spiral will go to God!.........thank you for reading my rant....Regards.....AL

Hi Al,

I know that the 'pies winning the flag can cause an upset, but not in wood as far as I know.....

In 08, it looks like the workpiece is moving away from the fence. You say you were using a push block. Was that from the back or against the side to hold the workpiece against the fence?

From my earlier test cuts, I know this method does work...so hang in there.

Can you orientate the work piece so that you are cutting along the long grain and not across the end grain? In other words have the end grain at the top and bottom of the piece?

James
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post #3 of 16 (permalink) Old 10-04-2010, 04:37 AM Thread Starter
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Sorry James...no can do with the grain....the workpiece is at ninety degrees to the bit and fence with the push block. As I approach the bit I push the workpiece against the fence with my left hand and push the block along with my right,maintaining a steady pressure against the fence with both. Keep thinking mate....I'm open to all suggestions.............AL
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post #4 of 16 (permalink) Old 10-04-2010, 09:32 AM
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Have you used this spiral bit much before? Is it a right hand or left hand?

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post #5 of 16 (permalink) Old 10-04-2010, 02:20 PM
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Glad to see you didn't get hurt Al.

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post #6 of 16 (permalink) Old 10-04-2010, 04:49 PM Thread Starter
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Doug...I dont know, come to think of it,....I'll go up to the shed later and have a look.....is that a consideration? Something I never thought of!
Glenmore...funny(not),,,,I was thinking of your busted thumb when I was having all this drama..and thinking "I will not duplicate Glenmores little accident"
Any how....thanks for the posts...any one else want to stick your noses in...your welcome......wheres the young fella from Sand Groper Land when ya need him?........Regards...AL
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post #7 of 16 (permalink) Old 10-04-2010, 05:38 PM Thread Starter
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Here is a quick photo of the 3/8 bit....looks to me as if its right hand flutes...any one else like to comment...........AL
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post #8 of 16 (permalink) Old 10-04-2010, 05:48 PM
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The reason I asked, is I was at a woodwork show and in the collection of loose bits they had in the bargain bin were a couple left handed spirals. I doubt they would work much at all, but ya never know.

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post #9 of 16 (permalink) Old 10-04-2010, 09:39 PM
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Originally Posted by Al Robins View Post
Sorry James...no can do with the grain....the workpiece is at ninety degrees to the bit and fence with the push block. As I approach the bit I push the workpiece against the fence with my left hand and push the block along with my right,maintaining a steady pressure against the fence with both. Keep thinking mate....I'm open to all suggestions.............AL
Hi Al,

you say the workpiece is 90 degrees to the bit and fence.

Is the workpiece flat on the table or vertical to the table?

When B&R do these joints the workpiece is vertical to the table and parallel to the fence.

2cents......

James
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post #10 of 16 (permalink) Old 10-05-2010, 01:06 AM Thread Starter
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Thanks James...yes, the workpiece is flat on the table.....will go up to shed after the medicinal two or three and take a couple of photos. Have got a couple of back up plans....dont know the results yet, but if it works I'll let you know.
Doug...having a quick look...you can get up/down spiral bits. How and when you use them????...maybe our learned sages may like to pass comment........AL
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