Countersink Cutter size

Terrybrd · #1 02-10-2013, 08:16 AM

Just ordered 1st kit and need to get some tools ordered.
On the machine countersink cutters, which OD is best to get, the 3/8 or 1/2 size?
I bought a tool kit from a friend that built a Zenith so I have a lot of what I need but have to go through it.

Thanks
Terry

GAHco · #2 02-10-2013, 06:45 PM

Quote:

Originally Posted by Terrybrd

Just ordered 1st kit and need to get some tools ordered.
On the machine countersink cutters, which OD is best to get, the 3/8 or 1/2 size?
I bought a tool kit from a friend that built a Zenith so I have a lot of what I need but have to go through it.

Thanks
Terry

3 / 8 works good on most everything RV

HDDAHL · #3 02-10-2013, 06:53 PM

Need a 1/2" for the gear mod (1/4" pilot), but I don't know if the new kits are built with the necessity for the mod or start from scratch.

Doug Dahl

DaveWelch · #4 02-13-2013, 07:58 PM

I've got both, but as far as I can recall the 3/8 will work for everything EXCEPT the 1/2" diameter needed for the main gear wear plate. That one also requires a 1/4" pilot. I think it was around 4 bucks from Aircraft Spruce. Worked fine in a drill press on low RPM per Van's instructions.

Rupester · #5 02-13-2013, 08:54 PM

Yep ... the 3/8" ones will work in tight places that the 1/2" dia won't. I found that out after I bought all 1/2" dia countersinks.

Terrybrd · #6 02-14-2013, 02:34 AM

Thanks for the info.
I have all but the 1/4 one on order.
Waiting to hear from Vans that the kit is ready to ship, then the fun begins

Terry

ppilotmike · #7 02-14-2013, 08:06 AM

is a good thing. That way countersinks can be set to proper depth and not fooled with again. I got a good deal at OSH and bought 3 so I'd have a variety of sizes and set depths. Saves time..

tfarrell839 · #8 05-01-2013, 10:22 PM

How many of you also purchased the 120 degree countersinks? Don't forget those . . .

JanRV6UK · #9 05-02-2013, 04:23 AM

Look on eBay - you will find several listed - they tend to be - good quality at a good price ..

MacPara · #10 05-02-2013, 09:40 AM

Quote:

Originally Posted by tfarrell839

How many of you also purchased the 120 degree countersinks? Don't forget those . . .

The 120 deg is required for the CS4 rivets (flush pull rivets) as they have a flatter head angle than the AD3 and AD4 rivets. You only need one with the #30 pilot.