if you curt fiberglass or carbon fiber killer deal on bits.

[knight_toolworks]

you can't go wrong on this price they usually have 1/8" ones too
http://www.ebay.com/itm/Onsrud-PCL532186-1-4-5-pack-Solid-Carbide-Router-Bits-for-Fiberglass-/221433397451?ssPageName=ADME:B:SS:US:1123

[donek]

Just picked up 5. Any link to proper feeds and speeds for those bits?

[steve_g]

Pg 24 of this catalogue it’s a 67-500 series...
https://www.onsrud.com/files/pdf/2014-Onsrud-Complete-Catalog.pdf (https://www.onsrud.com/files/pdf/2014-Onsrud-Complete-Catalog.pdf)
SG

[knight_toolworks]

now if I could cut more things with them. I am stocked up but selt=dom use them.

[scottp55]

Thanks Steve, Didn't need fiberglass, but got onsrud dovetails at good price. First e-bay order ever.

[tlempicke]

Down at the bottom of the ad they show the single flute plastic cutters that I love so much. Just loaded up on them!

[donek]

Pg 24 of this catalogue it’s a 67-500 series...
https://www.onsrud.com/files/pdf/2014-Onsrud-Complete-Catalog.pdf (https://www.onsrud.com/files/pdf/2014-Onsrud-Complete-Catalog.pdf)
SG

There's some rather fascinatingly undefined terms on that document.

What is "Cutting Edge Diameter"? It only shows up once in the entire pdf, and as a result is never defined. Is it the value D used in some of the equations?

Feed Rate is dependent on "number of cutting edges" and "chip load". Neither of these values are provided for these tools. Should probably just call onsrud, but perhaps someone here can clarify.

[garyb]

"Cutting Edge Diameter"the diameter of the tool measured from cutting edge to cutting edge ;)
you will find it as the header in all the chipload charts

Feed Rate is dependent on "number of cutting edges" and "chip load". Neither of these values are provided for these toolsbecause these tools are a burr with multiple cutting edges dependent on the the length of cut.
Gary

[donek]

the diameter of the tool measured from cutting edge to cutting edge ;)
you will find it as the header in all the chipload charts
because these tools are a burr with multiple cutting edges dependent on the the length of cut.
Gary

OK. So cutting Edge Diameter refers to the tool diameter. Am I to guess that the value of .002 -.004 is the chip load for the 67-500. How does one calculate the number of cutting edges? In the depth of cut information at the top right, does D refer to tool diameter?

Sorry, but this is one of the most poorly thought out charts I have even encountered. The "Cutting Edge Diameter" appears at first look to be the title of the chart, but I guess the title is actually "Chip Load per Tooth"

[steve_g]

Sean...
This bit isn’t one of the usual ones... But, the only real question is how many flutes? It obviously isn’t the total number of “spurs” on the tool and is more than likely the number of spurs that would pass by a point in space in one revolution. I’m guessing that this would be about 10 based on looking at the photo. Plugging this into the SB chip load calculator, we get a speed of 4.5 – 6 IPS based on a suggested rpm of 9000 –12000.
I would think that this would make a good starting point and I would be curious for someone to post their real world experience.
SG

[donek]

Sean...
This bit isn’t one of the usual ones... But, the only real question is how many flutes? It obviously isn’t the total number of “spurs” on the tool and is more than likely the number of spurs that would pass by a point in space in one revolution. I’m guessing that this would be about 10 based on looking at the photo. Plugging this into the SB chip load calculator, we get a speed of 4.5 – 6 IPS based on a suggested rpm of 9000 –12000.
I would think that this would make a good starting point and I would be curious for someone to post their real world experience.
SG

Thanks Steve.

[feinddj]

Cutting edge is the width of the cutter. The diameter of the tool might be different, as in an eight inch cutter with a quarter inch shank.