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Thread: WK Crawler Conversion - 5 Step/HPI Conversion Hybrid

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Old 10-28-2007, 07:44 PM   #1
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Default WK Crawler Conversion - 5 Step/HPI Conversion Hybrid

HPI Guide: http://www.hpiracing.com/news/2007061801.html
5 Step Guide: http://www.rccarreviews.com/rc-revie...ck-crawler.htm

Now What I am planning on doing is doing a hybrid of the two conversions...

I installing:
HPI Guide:
Spur and Pinion Gears
Custom made links (using 5 Step Method tho)

5 Step Guide:
Rotate the Suspension Stays
Axle mounted Servo

"Own" Ideas:
Chassis Reveresed

The HPI Guide doesn't turn the suspension stays... but i am doing that as it will give more clearance...

Now the thing i want to know:

Does anyone know what "632 Allthread" is? My local Toyworld knows about the 4-40 Althread but not this 632...?
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Old 10-28-2007, 07:45 PM   #2
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6/32 is US Standard.
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Old 10-28-2007, 07:59 PM   #3
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Ok, well how does it convert to Metric?
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Old 10-28-2007, 08:09 PM   #4
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6/32 in metric would be the 4-40 as you stated.
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Old 10-28-2007, 08:18 PM   #5
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6-32 and 4-40 are both standard, not metric.
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Old 10-28-2007, 08:33 PM   #6
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Quote:
Originally Posted by sgteldridge View Post
6-32 and 4-40 are both standard, not metric.

uh... now i am confused? So is 632 the same as 4-40 or not?

What are the both in metric measurements? (Also what do they mean? I guess 4-40 is 4mm diameter? 40 = ???)
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Old 10-28-2007, 09:27 PM   #7
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Whoops - sgteldridge is right.

6-32 and 4-40 are both standard size threads.

4 being the diameter and 40 being the number of threads per inch.
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Old 10-28-2007, 09:34 PM   #8
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6-32 is bigger then 4-40

hope that cleared things up...
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Old 10-28-2007, 09:39 PM   #9
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Hmm ok 6mm seems strangely large for the HPI Rod Ends used in the HPI Tutorial...

Maybe not... I'll have to see if one of my local hardware stores has that 6-32 threaded rod...
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Old 10-28-2007, 09:43 PM   #10
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birdie - if not, check out mcmaster.com - they have EVERYTHING. and resonably priced, but I donno about the currency conversion.
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Old 10-28-2007, 10:11 PM   #11
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Quote:
Originally Posted by safetydang View Post
6-32 is bigger then 4-40

hope that cleared things up...
Maybe i can add somthing of value on this one.

6-32 means that it is stock made from number 6 wire guage and 32 is the number of threads per inch.

So 4-40 is number 4 wire guage and 40 threads per inch. (smaller than 6 as it has been pointed out)

There are no metric equivelents to either of these. in other words you cannot interchange these with any metric thread. The thread pitch and depth are drastically different. Unless you are threading into plastic and you can force them to reshape the threads.
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Old 10-28-2007, 10:34 PM   #12
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Thanks rcmadness, that now makes sense
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Old 10-28-2007, 11:22 PM   #13
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Quote:
Originally Posted by rcmadness View Post
Maybe i can add somthing of value on this one.

6-32 means that it is stock made from number 6 wire guage and 32 is the number of threads per inch.

So 4-40 is number 4 wire guage and 40 threads per inch. (smaller than 6 as it has been pointed out)

There are no metric equivelents to either of these. in other words you cannot interchange these with any metric thread. The thread pitch and depth are drastically different. Unless you are threading into plastic and you can force them to reshape the threads.
DIng ding ding, we have a winner! Exactly what the reference book would say!

BTW, 3mm is slightly larger diameter than 4-40 so that is the closest metric size there. 8-32 is slightly larger than 4mm...about .006"
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