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Old 11-12-2013, 11:20 PM   #1
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Default What size clevis, kwik-link, etc?

I busted the ... clevis? on my BP-109 Fun Fighter. I have no idea what to replace it with, how sizes work, or etc.

I have almost zero experience with this kind of connector; almost all my planes use Z-bends. But this guy has threaded push rods and plastic connectors on the end. Something like this:



My cheap calipers make the rod to be about 0.047".

Any help appreciated.

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Old 11-13-2013, 01:40 AM   #2
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The sizes of the clevices is based on the thread size at the end of the pushrod.

.047 is in the micro clevice sizes by DuBro
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Old 11-13-2013, 04:06 AM   #3
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Thanks. So the mini-nylon Kwik-links would be the wrong size?

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Old 11-13-2013, 05:06 AM   #4
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I'm not sure which wire that will fit.

I do know DuBro Makes them as small as to fit .042 wire

This is significantly smaller than the 2mm which is the smallest I use.
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Old 11-13-2013, 05:28 AM   #5
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Originally Posted by mclarkson View Post

My cheap calipers make the rod to be about 0.047".

Any help appreciated.
For those that would like an inexpensive caliper, check out this one from Harbor Freight. It shows inches to 0.001, millimeters, and fractions of an inch. I've checked several of my HF calipers against my Starrett micrometer. They are within 0.001 inches, not bad.

And, it goes on sale once and a while:
http://www.harborfreight.com/6-digit...ngs-68304.html

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Old 11-13-2013, 08:29 AM   #6
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Originally Posted by mclarkson View Post
I busted the ... clevis? on my BP-109 Fun Fighter. I have no idea what to replace it with, how sizes work, or etc.

I have almost zero experience with this kind of connector; almost all my planes use Z-bends. But this guy has threaded push rods and plastic connectors on the end. Something like this:



My cheap calipers make the rod to be about 0.047".

Any help appreciated.
One of the biggest problems with many clevis on todays models - trying to buy replacements is difficult ... I have loads of rods that I cannot get the small clevis factorys use .. so I have to replace not only clevis but rod as well ...

Your rods are a good example at 0.047" = 1.19mm ...

A trip to local Hobby Shop with the rod and clevis I think ...

Nigel

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Old 11-13-2013, 08:46 AM   #7
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Clevises from BP hobbies, the 4-40 are the standard size, but you will need to gauge your wire size for your clevis


************************************************** ************************************************** ****************************************
found it .047 clevis

http://www.hobbylinc.com/htm/dub/dub...FWJBQgodeEUAIw

************************************************** ************************************************** ****************************************
http://www.bphobbies.com/view.asp?id...ufacturerDBID=


.047 Clevis

http://www.bphobbies.com/view.asp?id...63&pid=V368578

I may be getting Older, But I Refuse to grow Up I am Having to much Fun to Grow Up LOL
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Old 11-13-2013, 10:11 AM   #8
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http://www.hobbylinc.com/htm/dub/dub...FWJBQgodeEUAIw

Do that one. I can foresee issues trying to use the others
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Old 11-28-2013, 01:12 AM   #9
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Originally Posted by kyleservicetech View Post
For those that would like an inexpensive caliper, check out this one from Harbor Freight. It shows inches to 0.001, millimeters, and fractions of an inch. I've checked several of my HF calipers against my Starrett micrometer. They are within 0.001 inches, not bad.

And, it goes on sale once and a while:
http://www.harborfreight.com/6-digit...ngs-68304.html
Success....took four trips to HF, each time they were expecting it in. Today, it finally arrived in stock and it is one very nice tool, especially for the money. It was marked down to ~19.98 and I had a 25% coupon....smiled all the way home....Thanks Kyle
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Old 12-01-2013, 01:27 AM   #10
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Originally Posted by DEG View Post
Success....took four trips to HF, each time they were expecting it in. Today, it finally arrived in stock and it is one very nice tool, especially for the money. It was marked down to ~19.98 and I had a 25% coupon....smiled all the way home....Thanks Kyle
Yup, can't beat the price. This thing would not have been affordable, or maybe even not in existence ten years ago.

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Old 12-01-2013, 08:45 AM   #11
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Sorry to say this but my Calipers - I have 2 !! one $8, other $5 .... and actually checked against my "Standards" micrometer test piece as accurate.

I also checked other measurements by first using micrometer and then calipers ... same result.

One is in very nice padded case ... other in a plastic wallet ... but both same brand.... Powerplus .... they also do remarkably cheap electric drills etc.

Nigel

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Old 12-01-2013, 11:02 PM   #12
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Originally Posted by solentlife View Post
Sorry to say this but my Calipers - I have 2 !! one $8, other $5 .... and actually checked against my "Standards" micrometer test piece as accurate.

I also checked other measurements by first using micrometer and then calipers ... same result.

One is in very nice padded case ... other in a plastic wallet ... but both same brand.... Powerplus .... they also do remarkably cheap electric drills etc.

Nigel
Hi Nigel
Out of curiosity, do your calipers also display in inches and fractions of an inch, like 0.296 inches is also 19/64th? (Some of us guys on this side of the big pond still use inches and fractions!)

That feature adds a few $$$$ to the cost of the caliper.

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Old 12-02-2013, 01:53 AM   #13
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Raising my hand on the "Inches"...lol....but I do work in both.... And, if Nigel found one on his side of the pound that he likes at those prices, good on him. I like the one Kyle pointed me to and the price still makes me smile.....

Thinking about going out to HF and picking up another one, one for my shop and one for my office where I do my drafting.....
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Old 12-02-2013, 07:59 AM   #14
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Originally Posted by kyleservicetech View Post
Hi Nigel
Out of curiosity, do your calipers also display in inches and fractions of an inch, like 0.296 inches is also 19/64th? (Some of us guys on this side of the big pond still use inches and fractions!)

That feature adds a few $$$$ to the cost of the caliper.
Hi Denny ... I'm not at home as you know - but I think they only show metric.

But c'mon - motor shafts we use etc. are near all in metric sizes along with bolts etc.

But I know that USA ... like UK is "Going metric inch by inch !"

Nigel

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Old 12-02-2013, 08:37 PM   #15
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Originally Posted by solentlife View Post
Hi Denny ... I'm not at home as you know - but I think they only show metric.

But c'mon - motor shafts we use etc. are near all in metric sizes along with bolts etc.

But I know that USA ... like UK is "Going metric inch by inch !"

Nigel
Yup
But my 12 inch lathe, balsa sheets, aircraft plywood and similar stuff is all that old inch stuff.

As for me, I've been using tape measures with both inch and metric scales on them. Real handy when you want to find the exact center of some stick of wood. The metric scale makes it real easy!

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Old 12-02-2013, 08:51 PM   #16
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Originally Posted by kyleservicetech View Post
Yup
But my 12 inch lathe, balsa sheets, aircraft plywood and similar stuff is all that old inch stuff.

As for me, I've been using tape measures with both inch and metric scales on them. Real handy when you want to find the exact center of some stick of wood. The metric scale makes it real easy!
You don't want to come into my world !!

We have shipments going out in so many designations of volume, tonnage .. sometimes the list is crazy !! Particularly that for some reason the Pilgrim Fathers as they crossed the Pond ... decided to change measures !!

ASTM Table 1 details the standard conversions .... we have to carry a set of them !!

Nigel

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Old 12-02-2013, 09:16 PM   #17
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Originally Posted by solentlife View Post
You don't want to come into my world !!

We have shipments going out in so many designations of volume, tonnage .. sometimes the list is crazy !! Particularly that for some reason the Pilgrim Fathers as they crossed the Pond ... decided to change measures !!

ASTM Table 1 details the standard conversions .... we have to carry a set of them !!

Nigel
My wife absolutely hates anything metric. I've not been able to convince her that the american dollar is based on "metric", as compared to English Pounds and so on!

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Old 12-03-2013, 02:18 AM   #18
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As I said, I already have a - cheap - set of calipers. My problem was that none of the clevises seemed to say what diameter rod they were for. It was all like, "2-56 rods" and I have less than no idea what that actually means.

In the end, I drilled the broken peg out of my busted clevis and replaced it with an 'L' of piano wire.

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Old 12-03-2013, 11:15 AM   #19
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What really annoys me - is not so much the lack of size info - it's the lack of the small clevis that factories use on the models - that when they break or you need replace etc.- where the hell do you get them from ?

The only supplier I knew of - has now given up business ... so it's back to swapping out small gauge gear for more readily available 2mm stuff.

It's one reason why I swapped to link-stoppers - the type with the rod passing through a hole and then a screw tightening down on it. Local Flower shop sells wire rod of ~1.5mm .. and as long as it's in short lengths - the softness of it is ok.

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