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Forum topic by Dave Dye posted 11-20-2013 05:23 PM 730 views 0 times favorited 9 replies Add to Favorites Watch
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Dave Dye

8 posts in 1779 days


11-20-2013 05:23 PM

How do you extend a 3/4” router bit. If you use an extension, it’s bigger than the bearing on the 3/4” bit. Perplexed.

-- Dave Dye


9 replies so far

View PurpLev's profile

PurpLev

8523 posts in 3111 days


#1 posted 11-20-2013 05:28 PM

if you need to “extend” the bit to reach deeper then it’s cutting flutes you would have to get a longer cutter.

most extenders are designed to allow the bit to extend more from the base of the router – not for it to cut deeper than it is designed to.

-- ㊍ When in doubt - There is no doubt - Go the safer route.

View bowedcurly's profile

bowedcurly

515 posts in 1192 days


#2 posted 11-20-2013 06:14 PM

how deep are your flutes, flutes should only be 1/2 inch at most the bit should extend at least 3/4 of an inch, don’t understand question I guess me so dumb.

-- Staining killed the wood<<<<<>>>>>Dyeing gave it life

View 404 - Not Found's profile

404 - Not Found

2544 posts in 2432 days


#3 posted 11-20-2013 11:44 PM

Use a straight 1/2” worktop cutter with a 2” depth of cut and take out one cut progressively, move the fence 1/4” and take out the rest.

Edit, Since you mention a bearing on the 3/4 bit, use a guide bush with the half inch cutter and make the template to accommodate the guide bush.

What kind of shapes are you cutting and how deep do you need to go? I’ve seen 1 1/2 long bearing guided 3/4 straight cutters on the bay.

Or, if you are shaping curves in thick material, use your top bearing guided cutter with a template, bandsaw out near the line, flip the work piece and use a long bottom bearing guided cutter running the bearing against the shape you already cut on the other side.

View Dave Dye's profile

Dave Dye

8 posts in 1779 days


#4 posted 11-21-2013 01:30 PM

I”m sorry, I didn’t explain my self very well. I using a plunge router with a 3/4” dish cutter bit. In order to cut a deeper bowl you normally use a collet extender. However, the extender is bigger than the bearing on the 3/4” bit, therefore, the bearing will not make contact with the pattern or the side of the already routed out bowl. Any ideas will help.

Thanks
Dave

-- Dave Dye

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bowedcurly

515 posts in 1192 days


#5 posted 11-21-2013 03:05 PM

you need to go with the 1 1/4 inch dish cutting bit that will solve your problem I have two whitside bowl bits and have no problems with my extension the 3/4 will not work unless you have it special made or have a special extension made I hope this helps

-- Staining killed the wood<<<<<>>>>>Dyeing gave it life

View bowedcurly's profile

bowedcurly

515 posts in 1192 days


#6 posted 11-21-2013 03:08 PM

or you can make somekind of fence or pattern to use but I think the bigger dish cutter will help all you need is the bit everthing else bein a 1/2 in shank good luck have a good day

-- Staining killed the wood<<<<<>>>>>Dyeing gave it life

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PurpLev

8523 posts in 3111 days


#7 posted 11-21-2013 03:17 PM

in that case – use a wider bit as mentioned above.

or find another method of making that cavity

-- ㊍ When in doubt - There is no doubt - Go the safer route.

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Dave Dye

8 posts in 1779 days


#8 posted 11-21-2013 05:09 PM

Thanks, the wider bit won’t work, I’m cutting a pattern with only a 3/4” indentations. I’ll keep thinking. Maybe an extension for a 1/4” bit will work, it looks smaller.

-- Dave Dye

View bowedcurly's profile

bowedcurly

515 posts in 1192 days


#9 posted 11-21-2013 07:08 PM

ching chang ching chang ching chang ching ching chain

-- Staining killed the wood<<<<<>>>>>Dyeing gave it life

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