piloted counterbores?

[peter r]

where may i find a piloted counterbore? i need 7/16th bore and a 3/16th pilot? ive been looking for these for a while now.

 

[Patrice Lemée]

I've seen them done on a lathe if you have one. Of course the pilot only be a guide/pin, not drill. Although there must be a way to make it a drill too. But I ain't no machinist as you surely knows.

 

[peter r]

Ill speak to a machinist. But would love astore that just sells them.

 

[Patrice Lemée]

Sorry, did a little research but my Google FU is weak today. Can't find any in that size.
Maybe Sam (The Count) will chime in. He can find anything.
Good luck.

 

[Danketch]

I know you can buy drill/counterbores in popular bolt hole sizes, try looking at major manufacturers (Guhring, Cleveland, etc.) You can also take a centercutting 2 flute end mill, and grind to size on a surface grinder. These work pretty great in a mill, probably not so much for a hand drill.

 

[Craigb]

http://www.mcmaster.com/#counterbores/=h2r4f9


McMaster Carr has some changable pilot types.

 

[12345678910]

Thanks Pat, I try to please.



http://www.use-enco.com/CGI/INLMKD?SIITEM001=368-3112&SIQTY001=1&SICOUNT=1


I just noticed too late Peter is a Canadian

McMaster Carr is a great reference for us, but as a Canadian, we can't order from them unless we already had an account in the past.
No new Canadian accounts allowed when I tried.

Enco has a great search function.
I've ordered from Enco and had no problems, but specified USPS, not UPS
There is no tracking or insurance using this.
If it's lost in the mail, your loss.



For a Canadian source, I've ordered from KBC Tools
Get the paper catalogue, it's nicer to use than the website

http://www.kbctools.com/can/Navigation/NavPDF.cfm?PDFPage=66
5-040-045


http://www.kbctools.com/can/Navigation/NavPDF.cfm?PDFPage=66
5-042-10012

 

[1SHOT1KILL]

http://www.mcmaster.com/#counterbores/=h2r4f9


McMaster Carr has some changable pilot types.

+1 on McMaster Carr...I buy one or two about every week or so depending on what work needs to be done or what my guys break...
They also have a nice guide to match the counter bore to the material you're machining.

 

[kc custom]

Gene Iverson one of our own, he posts in folders for sale.
Ken.

 

[Erin Burke]

I didn't see anyone answer with MSC yet, but they can get you a 7/16" interchangeable-pilot counterbore and a 3/16" pilot...
I get a lot of stuff from them when they have cutting tool sales. Enco is usually cheaper, though their selection is usually more limited.
Erin

 

[Mahoney]

Travers Tool is another source of these, and they sell to Canada.