Drilling For Aluminum Pillars

[yukonal]

Hey guys,

The Brownell's pillars are .003"-.004" bigger diameter than a 9/16" bit.

What size end mill, or counterbore, or drill bit are you using to drill holes for pillars(Brownell's or any other supposedly 1/2" pillar)?

Said pillars are .565" diameter. 9/16" bit is .562" diameter if my math is right.

Also, how much room do you like to have around the pillars for fit, allowing for mud?

 

[Dusty Stevens]

I like plenty of room. I use 5/8 pillars and widen the holes at the top to funnel epoxy down around em

 

[billlarson]

I RUN A TAP THRU THE STOCK TO ALLOW ADHESIVE TO GRIP...
bill

 

[Geno C]

I RUN A TAP THRU THE STOCK TO ALLOW ADHESIVE TO GRIP...
bill

I thought I was the only one that did this. 9/16 drill then tap, 9/16 pillar fits every time for me. Wood, laminate, fiberglass, it's worked in all of them

 

[Keith Glasscock]

That's brilliant!

 

[yukonal]

I thought I was the only one that did this. 9/16 drill then tap, 9/16 pillar fits every time for me. Wood, laminate, fiberglass, it's worked in all of them

Whose pillar, or what brand are you talking about?

Ernies Bed Heads will work with a 9/16", but Brownells won't.

 

[yukonal]

I like plenty of room. I use 5/8 pillars and widen the holes at the top to funnel epoxy down around em

Thanks Dusty. I'll invest in a 5/8" counterbore with a 5/16" pilot. Should cover anything...

 

[Dusty Stevens]

Get whatever size counterbore you have pillar making stock in. Some use 1/2. I use 5/8 cause thats as big as i can get under the triggerguard and floorplates

 

[Geno C]

Whose pillar, or what brand are you talking about?

Ernies Bed Heads will work with a 9/16", but Brownells won't.

I make my own out of 9/16 aluminum rod

 

[teele1]

this is the bit i use for Brownells Pliiars don't for get you also need the pilot
http://www.skygeek.com/aircraft-tool-supply-4000-13-aircraft-counterbore.html
works great
hope this helps
jim

 

[yukonal]

this is the bit i use for Brownells Pliiars don't for get you also need the pilot
http://www.skygeek.com/aircraft-tool-supply-4000-13-aircraft-counterbore.html
works great
hope this helps
jim

Thanks Jim, I figured I'd need a 5/8".

 

[kendog]

I RUN A TAP THRU THE STOCK TO ALLOW ADHESIVE TO GRIP...
bill

Way smart. Thanks!