What are these bits for?

[john_l]

Since I just bought over 40 of these at auction, I thought I'd ask on here what are they made to cut? i tried Onsrud 62300 but couldn't locate any info. Some straight, some spiral type, any Ideas?

7698


7699

[joe]

John,

Perhaps you should check out www.onsrud.com (http://www.onsrud.com) and go to their product search. Just enter the part# and the online seach will give you the nomenclature.

[john_l]

Thanks Joe. i did try that already but it didnt turn up anything on these numbers (at least anything that looks like these bits). They don't have a 61w (5/16") listed and the 62-300 (1/4")that they have doesn't look like these bits.

I will attach a better pic of the 62300 this time, without the wax. It has a sharpened bevel point and then a smooth section with no cutter, then it goes into the down spiral section for about an inch. These came from a cnc shop but I cant figure out what they could have cut with them.

I didn't pay much so its noloss, I wanted the 5/16 straights that I got with them because my bot came with a 5/16 collet from the previous owner.


7700

[seana]

John,
I guessing, but it looks like a plunge bit.
You would use this in a plunge router and the template would be underneath your material and the "smooth" part of the tip rides on the template.
Not going to work very good for CNC work.

Again just a guess.

Hope this helps.

Sean

[handh]

John,

It appears to be a downcut spiral bit. Here is a link to a business that has them for sale.

http://amtcnc.com/osc/product_info.php?pName=62300-solid-carbide-single-edge-spiral-wood-rout-516

They are around 42.00 each

Jeff

[evan]

It looks like a specialty bit for a laminated material , designed to plunge straight down through the material then to cut out a shape or whatever.
Take a look at the 20-00 series bits.

Also WKW stands for Wisconsin Knife Works

[handh]

It says on the website that it is for soft woods

Description OBS 5/16 SC DC SE WOOD ROUT
Tool Mat'l: Solid Carbide Price $41.35
Unit Inch C.E.D. 5/16
Helix Down C.E.L. 1 1/8
Edge finish Semi-Finished SHK 5/16
Flutes 1 O.A.L. 3


--------------------------------------------------------------------------------
6 other parts in series 62-200


PART #
CED
CEL
SHK OAL MATERIAL HELIX FLUTES PRICE

62-240 1/8 1/2 1/4 2 Solid Carbide Down 1 $24.55
62-280 1/4 5/8 1/4 2 1/2 Solid Carbide Down 1 $24.55
62-285 1/4 1 1/4 2 1/2 Solid Carbide Down 1 $25.85
62-300 5/16 1 1/8 5/16 3 Solid Carbide Down 1 $41.35

When you click on the 62-300 it pulls up a picture of the 62-200 that might be why it doesn't look like the one you have. But the specs on the 62-300 seems to be like what you have.

[john_l]

Thanks... Yep, thats the one... 62-300 5/16 1
1/8 5/16 3 Solid Carbide Down 1 $41.35

Well, I cant really use them but if I can get a
few dollars for them on ebay or something I'll
be alright. If they are $41 from Onsrud, then $6
each should be a deal? I've got 35 of these and
30 of the straight ones I believe.


The straight bits are marked only "Onsrud 61W" I
couldn't find info on those either. I attached a
(not very good) pic in case you guys know what
materials they will be good to cut. They are
2 cutter straights, 5/16" CED, about 1" CEL.


Thanks again.

John
7701

[john_l]

I just got off the phone. I spoke to a buddy that works for a modular home plant in my area. He says he thinks these downcut spirals are the very same bits they use to cut window and door openings out of framed and sheathed prefab walls. He is taking them into work tomorrow with a sales pitch for me. Thanks guys.

[fleinbach]

John,

The Journal of light construction just did an article last month about a carpenter who cuts out all his window and door openings using this type bit.

[knight_toolworks]

I see those batches on ebay all of the time. too bad they are not useful.
though I did get a onsrud 3/8" rougher that goes for 108.00 for 20.00 including shipping a couple weeks ago.

[tradition_wood]

I was going to say they look like bigger versions of "zip bits"

[wberminio]

Since we are on the topic of bits-

Does anyone have any thoughts of sharpening bits?
Is it even possible? Are there any cons?Pros?

Thanks

Erminio

[handh]

Yes you can sharpen bits, cons, the diameter of bit changes and so you have to change your toolpaths to allow for it. A resharpened bit never stays as sharp as a new bit, this has been my experience anyway. I can't seem to throw them away but I purchase new bits for my CNC. Have a drawer just for them, never know when you just might need one.

[knight_toolworks]

what about straight bits like a carbide tipped straight bit that is a typical router bit.I don't think it changes size.

[nschlee]

I've used Vortex in the past to sharpen .25" 2 flute solid carbide DS spirals. They come back as either .235" or .220" dia. Vortex does a good job of reshapening, about half the cost of a new bit, they do discount for quantity.

[john_l]

I did sell these bits to the local manufactured home building plant. I got $9 each.. so they must have been worth about $25 a piece.. hahaha.

I'm happy cause I profited a little on something I wouldnt use.

I still don't know what they are made for, but those 5/16" straight bits are working great on mdf pocketing.

Thanks