RCCrawler Forums - Machinists...opinions?

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JasonInAugusta

07-23-2007 10:38 AM

Machinists...opinions?

1 Attachment(s)

Why undercut the hexes on these wheels?

All my RC4WD wheels are cut like this, not sure why.

There's tons of these out there and I haven't heard of hex issues so they must be strong enough.

666	07-23-2007 10:42 AM

I have one that has a cracked hex, it has been that way for a while. Not because of that though. I have been trying to break them, no luck so far!

BENDER

07-23-2007 04:03 PM

I think it's because of the manufacturing process of roughing out the hex on a lathe with a hole/counterbore. Then the hexes are formed to the finished shape/size with a broach. The undercut gives the broached chips a chance to break when the tool bottoms out. That's my guess anyway.

Rockpiledriver

07-23-2007 04:43 PM

Yes I'd agree with Bender. The hexes are broached you can see tool marks in the hex. I don't see any issue with it.

62PYRO

07-23-2007 08:31 PM

Quote:

Originally Posted by Rockpiledriver (Post 779261)

Yes I'd agree with Bender. The hexes are broached you can see tool marks in the hex. I don't see any issue with it.

X3.Definitely done with a broach.

JasonInAugusta

07-23-2007 11:00 PM

Thanks guys. Just wanted to understand why they're built the way they are.

I've cut hexes on my manual mill and rotary table but I always drilled the "corners" then milled from point to point.

Never had the fancy stuff at my disposal. :lol:

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