Another Throttle Lock Option

[Top Cat]

Originally Posted by caddmannq

What? Not unless you wanna stuff 3 of them 1/4-20's in the hole! 1/4-20 requires a #7 drill, which is .201" dia. but in aluminum you could use a 3/16" and just wiggle it a little as it's only .014" undersize.

This post doesn't make sense to me. First you imply the 3/16" hole is big enough to fit 3 of the 1/4-20 screws in.
Then you say in aluminum you could wiggle the 3/16" a bit to make it work. Wouldn't wiggling the 3/16" drill bit make the hole even bigger?

[macmac]

Wiggling sure would make the hole bigger, but the too small drill will leave over sized threads, which will clog the new device threads, making the part gag, early. Threads on nuts and bolts are no where near 100% contact, in most cases. There is supposed to be clearance at the peaks and valleys when 2 parts are mated, unless in a very special circumstance the specs are different, more like a jamb thread in pipe fittings so a seal can be made in metal to metal contact.

I think that is what Cadd might have been refering to, and untill he says other wise that is my take. There is a risk in stripping the alloy, and once that is done you can fit maybe those 3 bolts in the hole..

Ah ha! A pointy tip huh? I need more information. I hope this part has beeen thought out well enough, that it won't slice and dice plastic, and cause chips, which may gag the THROTTLE, and or frizz the cable(s).

Inspect this hard before you alter stock threads!

[cactusjack]

Originally Posted by caddmannq

What? Not unless you wanna stuff 3 of them 1/4-20's in the hole! 1/4-20 requires a #7 drill, which is .201" dia. but in aluminum you could use a 3/16" and just wiggle it a little as it's only .014" undersize.

I'm guessing he meant a 3/16" drill. 13/16 is almost an inch.

[bobzinger]

whopps I meant 13/64 ths

[bobzinger]

Buy the way I suggested the 13/64 because I figured most folks would have that rather than a #7. The 13/64 is only .002 bigger.

13/64 would be good if ya got one.

In aluminum you can take some liberties with tapping if you go slowly, so an exact hole size is less important than with steel. At least for non-critical applications like this.

Originally Posted by Top Cat (TC)

This post doesn't make sense to me. First you imply the 3/16" hole is big enough to fit 3 of the 1/4-20 screws in.
Then you say in aluminum you could wiggle the 3/16" a bit to make it work. Wouldn't wiggling the 3/16" drill bit make the hole even bigger?

Nah, Zinger said 13/16" which is over 3X too big. 3/16 is a tad small, but only 14 thousandths. Tapping soft aluminum alloy by hand, you'd be lucky to ever get it within 14 thousandths.

But now that I think about it, you need to drill out the cable housing retainer as well, and that must be drilled to 1/4" to get that 1/4-20 bolt through it.

Also, somebody said something about a star wheel, and I assume that goes inside the housing and is what the pointy bolt contacts.

[bobzinger]

[bobzinger]

[bobzinger]

On a Harley there was a shoe that pushed up against the throttle sleeve where the cables wrapped around. I'm thinking the end of the threaded rod just pushes up and digs intothe throttle sleeve. The star is the know you use to adjust it, and the lever is just something that allows you to easily adjust with gloves on.

OK, I get it now. I don't think I could personally endorse this obvious POS. In fact I know it.

This device is a Bad Idea IMO.

[bobzinger]

I agree. If it had a nylon ball or shoe to drag on the throttle sleeve for friction..maybe cause it worked on my Harley OK. But I'd be afraid the pointy end of that threaded rod would dig in and lock the throttle.

[jrd]

Originally Posted by caddmannq

OK, I get it now. I don't think I could personally endorse this obvious POS. In fact I know it.

This device is a Bad Idea IMO.

Why don't you tell us how you really feel

Thanks!
John

Well, aside from the pointy screw chewing up things. you've got steel threads going into aluminum, and they're spring loaded. This is guaranteed to chew up the aluminum.

But the real thing bothering me is this: If this thing uses the screw hole that attaches the throttle cable housing retainer to the aluminum casting (and it appears that it does to me) then what's going to be retaining your cable housings is a spring.

Do I need to explain why that is a really bad idea?

[cactusjack]

Originally Posted by caddmannq

Well, aside from the pointy screw chewing up things. you've got steel threads going into aluminum, and they're spring loaded. This is guaranteed to chew up the aluminum.

But the real thing bothering me is this: If this thing uses the screw hole that attaches the throttle cable housing retainer to the aluminum casting (and it appears that it does to me) then what's going to be retaining your cable housings is a spring.

Do I need to explain why that is a really bad idea?

..every party has a pooper that's why we invited you...