Digital caliper - HeliFreak
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Old 03-15-2007, 10:07 AM   #1 (permalink)
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Default Digital caliper

I was thinking of getting one of these to record my link lengths (so I don't have to reinvent the wheel after a crash):

Good idea or is this a POS? http://www.harborfreight.com/cpi/cta...emnumber=47256

I guess it only needs to stay accurate enough to a half turn..
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Old 03-15-2007, 10:20 AM   #2 (permalink)
 
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Yes the one above will work great. Get the 6 inch caliper for the same price.

Then get some of these to go on the calipers and your all set.

http://www.ronlund.com/Merchant2/mer..._Code=VAR11_86

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Old 03-15-2007, 10:20 AM   #3 (permalink)
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IMO, you'd be better served by the 12" model, especially if you're going to get into the larger helis.. Some of the links on my 600 look to be a tick over 3" and a 4" caliper will be difficult to use at that extreme end of it's range.

I got a good quality 4-button dig-cal on Flea-Bay for $50.. Been using it almost daily at work and here at home with no issues whatsoever for nearly 4 years. Still on it's 1st battery too! Sorry dunno the brand name, but the logo is a jet flying through a small circle..
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Old 03-15-2007, 10:22 AM   #4 (permalink)
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Those Vario pushrod nubs make short work of sizing pushrods.

What we do doesnt really require machinist quality tools just consistenency. The Harbor Freight stuff works just fine.
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Old 03-15-2007, 10:30 AM   #5 (permalink)
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Thanks, that's great. I am going to stop by Hapless Freight after work.
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Old 03-15-2007, 11:16 AM   #6 (permalink)
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get at least the 6" ones.

the calipers also make short work of equalizing the length of flybar but for 60-90 class machines,
the 6" caliper is a bit too short to do that.

yes, the Vario nubs are good (Rick's)
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Old 03-16-2007, 05:09 AM   #7 (permalink)
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Only problem I have found with mine is battery life tends to be somewhat low. And at Radio Shack, they aren't cheap.

But a bit of time with Google and I found a place selling a strip of 5 batteries for less than one at RS.
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Old 03-16-2007, 05:24 AM   #8 (permalink)
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I use a normal vernier caliper, works just as well and no batteries.
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Old 03-16-2007, 05:43 AM   #9 (permalink)
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I would opt for dial calipers rather than digital for the same reason peterob.
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Old 03-16-2007, 09:06 AM   #10 (permalink)
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I just got batteries at Walgreens, a 3 pack was less than a single cell from radioscrap and no shipping charges.

I agree to get at least the 6" caliper. If setting flybar and paddles on a 90, it will require a 12" model even my 8" is to short for this.
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Old 03-16-2007, 05:47 PM   #11 (permalink)
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Big advantage of digital over analog in this case is you can switch the digital between English and metric units. Very handy at times.

For many uses, I agree dial analog is more than good.
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Old 03-17-2007, 05:27 AM   #12 (permalink)
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I can tell you from experience the ones in teh original post don't work worth a hoot after you drop them in coolant.

I now have a pair made by TESA, who makes the same thing for Brown and sharpe, with a different label, and they are IP68 (coolant proof) and are probably one of the best sets of calipers I have ever owned. Even after a submersion in coolant. :mrgreen:
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Old 03-17-2007, 06:28 AM   #13 (permalink)
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the battery on my Mitutoyo has lasted a loooooong time but RatShack would be the last place to
get a battery unless you like getting raped.
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Old 03-17-2007, 06:45 AM   #14 (permalink)
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I like my Mitutoyo. The other advantage with digital is that you an zero them at any point. Not sure if you can do that with analog. My battery has lasted quite a while, but it really doesn't get that much use.
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Old 03-17-2007, 07:02 PM   #15 (permalink)
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Hmm, I never dropped mine in coolant.
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