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Countersink Cutter size

T

Terrybrd

Member
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
 
Terrybrd said:
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
Click to expand...

3 / 8 works good on most everything RV :)
 
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
 
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.
 
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. :(
 
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
 
More than one...

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..
 
Look on eBay - you will find several listed - they tend to be - good quality at a good price ..
 
tfarrell839 said:
How many of you also purchased the 120 degree countersinks? Don't forget those . . .
Click to expand...

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.
 
You only need one 120 degree C-Sink, #30

True. And I taped mine to a bottle of CS4 rivets so I wouldn't get it confused with the 100 deg C-sinks. It's too easy to grab the wrong one, and then wonder why the rivets don't sit quite right. I mean, not that I've done that myself you understand...
 
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