Most common safe?

It's got a gate in it, so I could defend their usage. (Do you call the ubiquitous Master padlock two- or three-wheel?).

Combining the drive cam with a wheel doesn't affect the number of possible combinations, just how well it protects its combo and contents.

Since they don't _intend_ these to do more than slow someone down a bit, that's fine. The problem comes when the marketing glosses over that point.

Drivecams on S and G have a "gate" if you want to call it that. Master padlocks I call them two wheel.

I wouldn't call it that. It doesn't interact with the fence; it's used to retract the bolt _after_ the gates in the combination wheels have been lined up.

On the Sentry, or a padlock, the dial is not used to retract the bolt. I would call these three-wheel with no drive cam, rather than two wheel with a drive cam.

But I agree that this is a fuzzy corner of the terminology. We ought to check that glossary-standardization effort and see whether the usages there match either, or neither, of our answers.

drive cam n. the first wheel rotated by a dial or key that has an opening designed to allow the fence, lever, or tailbar to enter and facilitate in opening of the lock or safe

The first wheel >

That matches my usage. Thanks.

If it has a gate it is a wheel. A wheel can do double duty as a drivecam. Most combo padlocks are designed that way.