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2nd March 2017, 08:46 PM #1Novice
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Help tracking down a router bit...
G'day all, I am new here. I found this forum as I am having trouble finding a certain size router bit I would like.
I am also relatively new to using routers, so I may well be in for a disappointing answer of 'it doesn't exist'.
I am after a flush trim bit preferably with a top bearing.
My router takes 1/4" and 3/8" shanks.
I would like the cutting face to be 42mm in length or 1 11/16.
I do not mind what diameter it is, however thicker would be preferred.
Any help would be greatly appreciated, thank you.
Josh
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2nd March 2017 08:46 PM # ADSGoogle Adsense Advertisement
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2nd March 2017, 09:19 PM #2Woodworking mechanic
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I have seen straight cut bits from China and Hong Kong with a 1/4" shank longer than that, but not one with a bearing. 25.4 mm or 1" seems to be the longest on the common brands. I'd be worried re deflection in long bits with 1/4" shanks.
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2nd March 2017, 09:22 PM #3Novice
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Yeah, I figure thats why I cannot track one down.
Perhaps I can find 2 1" bits, one with a top bearing and the other with a bottom bearing to make a pass on each side of the material.
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2nd March 2017, 09:29 PM #4
Hi Josh,
Im surprised that your router takes 1/4" and 3/8" shanks. The norm is 1/4" and 1/2" and there are adaptors/collets available that take the 1/2" down to 8mm.
If you can confirm the 1/2" (vs 3/8") issue then you will find a suitable bit online in the catalogs of Carbatec, Carbitool, Timbecon etc. These bits will have a 1/2 shank and probably won't be called "flush trim" but pattern bits or similar.
flettya rock is an obsolete tool ......... until you don’t have a hammer!
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2nd March 2017, 09:33 PM #5Novice
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Yeah it is a little odd, its a Makita RP0900X1
https://www.makita.com.au/products/p...-plunge-router
It comes with a collet for 1/4" - which I only found out by asking the sales guy why on earth they were selling a 3/8" collet router.
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2nd March 2017, 09:53 PM #6
It's raining outside and I've lost possession and control of the TV remote so I have time to 'browse'. SO FAR, the only bits I can find that match your needs have 1/2" shanks? There are a couple of alternatives. If you live near me, you could borrow a router and 1/2" shank solid carbide fluted bit from me that match your job perfectly. If not, a more local fellow forumite might also step up? A third option is to ask Carbitool to make a bit for you to suit the 3/8" shank but I fear that design calculations for that cutting length probably preclude a shank less than 1/2"?
flettya rock is an obsolete tool ......... until you don’t have a hammer!
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2nd March 2017, 10:15 PM #7Novice
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Fletty
That is such a generous offer, especially since I'm brand new here. Thank you very much. Unfortunately I live in Brisbane - I'll update my details later.
I'll contact Carbitool tomorrow for a chat, I didn't know that was an option!
I have found 2 bits to get the job done with a pass from either side, one 1" cutter and one 19mm inverted bearing. Its $60 odd worth of bits and twice the work, but if that what it takes then so be it! LOL
Thanks again mate, really happy I signed up here.
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2nd March 2017, 10:29 PM #8
Josh,
What about this one from the "Big Green Shed"....
https://www.bunnings.com.au/diablo-1...m-bit_p6370467
Looks a little shorter than you want but its a start
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2nd March 2017, 10:42 PM #9Woodworking mechanic
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I have a Makita (years old) also that takes 1/4" or 3/8" bits.
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3rd March 2017, 10:06 AM #10GOLD MEMBER
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Even if you could use a template guide bush to guide the router I don't think you will find a 3/8" shank straight or spiral bit that will provide the cutting length you're looking for. With 1/2" shanks you'd have no problem. A lot of manufacturers don't make any bits with 3/8" shanks, Freud and Whiteside are two exceptions that I know of. Try some of the other American manufacturers, they are the most likely to make something that will do the job for you.
Although you can buy a 1/4" shank bit to do the job it's disturbing that none of the quality brands make such a bit. Methinks because the possibility of them performing satisfactorily is almost non-existent. 1 pcs 1/4" Shank 2" Blade Extra Long Flush Trim Router Bit- 3/8"W x 2"H | eBay
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3rd March 2017, 01:36 PM #11
a quick read of the linked manual says that a 8mm collet is available to your router.
most of the router bits CMT make are available with 1/4" or 8mm shanks.
The longest 8mm shank bit (with a top bearing) I can see has a cutting length of 35 mm, a diameter of 16mm, and uses replaceable cutters -- order number 656.160.11
The longest conventional 8mm shank bit (with a top bearing) I can see has a diameter of 16mm and a cutting length of 31.7 mm -- order number 912.160.11B.
Almost certainly you would have to order both bits from Europe.
Of course, a shorter 1/4" bit will work, if you take two or three passes. CMT part number 812.127.11B is just one option.regards from Alberta, Canada
ian
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3rd March 2017, 03:11 PM #12
a second hand router would be cheaper than these exotic bits?
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3rd March 2017, 03:30 PM #13
You could be correct, then again I'd view an 8 mm collect as an investment which would allow the router to be used with the 8mm bits recommended for use with a Leigh Jig.
regards from Alberta, Canada
ian
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5th March 2017, 09:34 AM #14Novice
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Thanks for all the help guys, I didn't get anymore notifications of replies hence my late response.
I will look into all this info, thanks so much.
I had no idea about 8mm shanks, so that's definitely something to consider.
I thought of a second hand router to take 1/2" bits - I could get one for around $150 and a bit for $30-40...So at $180 - $200 I'd prefer to find something under $100 that will do what I want with my current brand new router.
Its kind of for one job too and then will be there if I ever need something similar, if I get into anymore than this 1 situation in the future I will invest in a larger router for sure.
Thanks again guys, I'll let you know how I get on!
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5th March 2017, 10:25 AM #15Taking a break
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If you get a solid carbide 3/8" spiral bit you can use the shank of the bit as your bearing surface as carbide spirals are always the same diameter for the full length.
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