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Cannon Powerworks Gripper Ratings


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#1 OFFLINE   EricMilfeld

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Posted 08 March 2013 - 08:37 PM

Just wanted to give an unsolicited thumbs-up for Matt's calibrations.  Tommy brought over over a 154 and a 194 gripper that had been calibrated by Matt tonight and asked me to see what figures I got for them.  My numbers were identical.  That makes three grippers now that we have cross-calibrated and attained identical readings.  For me this is very significant.  I have previously calibrated grippers rated by others and discovered their numbers to be inflated usually by five to ten pounds.  I've never calibrated a gripper and attained a number higher than someone else.  What troubles me is that some of these grippers are probably floating around at contests.  I've gone into detail about the method that both Matt and I use for calibrating on the board here several times in the past, but if anyone is calibrating and is unsure about their numbers let me know.  Maybe you could cross-calibrate with me or compare your reading with one of Matt's pre-calibrated grippers.  I just think it's imperative that contest grippers, in particular, have accurate numbers that can be duplicated by anyone using the proper method of calibrating.  


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#2 OFFLINE   Cannon

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Posted 09 March 2013 - 12:39 PM

Eric I really appreciate that you posted this. It is truly unsolicited too; I'm not sure we've barely ever discussed ratings. I think we both have just tried very hard to "get it right".

#3 OFFLINE   Bigdeze

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Posted 10 March 2013 - 08:43 AM

Good to hear since I have about 20 or so grippers calibrated by Matt.  :)



#4 OFFLINE   Jedd Johnson

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Posted 10 March 2013 - 06:03 PM

I'd be interested in rating one of your guys grippers instantly after you do it.  I rated one of Matt's last year and was 3 lbs off but this was also after the gripper was in a choker for quite a long time and lots of use, so maybe it got weakened by this type of use.

 

I'd be interested in seeing comparisons between many of the more common rating devices.  Mighty Joe suggested this a year or more ago but it never got off the ground.

 

Shoot me a PM if you are interested in cross-rating with my device.

 

Thanks.

 

Jedd



#5 OFFLINE   mudhutmasher

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Posted 10 March 2013 - 07:51 PM

I'd be interested in rating one of your guys grippers instantly after you do it.  I rated one of Matt's last year and was 3 lbs off but this was also after the gripper was in a choker for quite a long time and lots of use, so maybe it got weakened by this type of use.

 

I'd be interested in seeing comparisons between many of the more common rating devices.  Mighty Joe suggested this a year or more ago but it never got off the ground.

 

Shoot me a PM if you are interested in cross-rating with my device.

 

Thanks.

 

Jedd

PM sent



#6 OFFLINE   daniel reinard

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Posted 13 March 2013 - 09:20 AM

That's good to know. I know I get mine (grippers bought used. I shop and rate with Matt for new ones :) ) rated from someone who has cross rated with many reputable raters. It means alot to trust a number from someone who has double checked their work against proven people before him.


Edited by daniel reinard, 13 March 2013 - 09:22 AM.


#7 OFFLINE   Cannon

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Posted 28 May 2014 - 06:56 PM

We posted some ratings data we have compiled since June of 2012.  This is only ratings of new grippers for orders.

 

http://cannonpowerwo...th-ratings-data

 

If you have specific questions about HI/LOW ratings for a given gripper, we can try and answer those and hope to add those values to the chart eventually.



#8 ONLINE   Mike Sharkey

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Posted 28 May 2014 - 07:02 PM

We posted some ratings data we have compiled since June of 2012.  This is only ratings of new grippers for orders.

 

http://cannonpowerwo...th-ratings-data

 

If you have specific questions about HI/LOW ratings for a given gripper, we can try and answer those and hope to add those values to the chart eventually.

 

 

Numbers=Awesomeness



#9 OFFLINE   anwnate

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Posted 29 May 2014 - 04:40 AM

We posted some ratings data we have compiled since June of 2012.  This is only ratings of new grippers for orders.

 

http://cannonpowerwo...th-ratings-data

 

If you have specific questions about HI/LOW ratings for a given gripper, we can try and answer those and hope to add those values to the chart eventually.

 

Great to see this.  Thanks!



#10 ONLINE   Anthony C.

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Posted 29 May 2014 - 05:08 AM

Thanks Matt!

#11 OFFLINE   Cannon

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Posted 02 June 2014 - 06:18 PM

Already an update to the ratings data!  We added columns for the MIN and MAX rating for each individual gripper.  You can see there is quite a range in some cases.  This helps make the case for getting your actual order rated.  
 

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#12 OFFLINE   Alawadhi

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Posted 04 June 2014 - 07:10 AM

 

Already an update to the ratings data!  We added columns for the MIN and MAX rating for each individual gripper.  You can see there is quite a range in some cases.  This helps make the case for getting your actual order rated.  
 

 

Very nice!


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#13 OFFLINE   gerryg

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Posted 04 June 2014 - 01:32 PM

A Tetting Master rated at 148! Did you by chance put a micrometer on that spring?



#14 ONLINE   Anthony C.

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Posted 04 June 2014 - 04:54 PM

A Tetting Master rated at 148! Did you by chance put a micrometer on that spring?

That's crazy.  I have one at 118 that I thought was unusually heavy



#15 OFFLINE   dlewis8589

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Posted 04 June 2014 - 08:31 PM

A Tetting Master rated at 148! Did you by chance put a micrometer on that spring?

I wonder this as well



#16 ONLINE   Mike Sharkey

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Posted 04 June 2014 - 08:40 PM

So IM varies (shocker I know) up to 15#.  GHP's up to 10# or so, and Tettings up to 30#.  That's a massive spread.  What makes them so inconsistent?



#17 OFFLINE   Cannon

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Posted 06 September 2014 - 03:03 PM

 

A Tetting Master rated at 148! Did you by chance put a micrometer on that spring?

I wonder this as well

 

 

This is corrected, it was a GM:

 

http://cannonpowerwo...th-ratings-data



#18 OFFLINE   Cannon

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Posted 06 September 2014 - 03:13 PM

A quick note about our ratings.  Due to a generous gift from Mighty Joe, we've switched to a digital hanging scale.  Everything that involves the gripper or touches the gripper is still exactly the same.  We've done extensive cross-rating between our old and new setup for about a month and the numbers are matching exactly.  

 

There is one improvement that our digital results seem more consistent.  On the old setup we might see variation of a pound here or there due to the nature of the weight stack, but on the digital setup we're able to be much more precise and controlled.  Keep in mind we're still only measuring "pounds at the close".  One data point, same as before.    

 

We have what I would call a "proprietary" setup for the digital scale which was fine-tuned, re-designed, re-worked, and fine-tuned some more to ensure results are consistent with previous CPW ratings.  We've got it nailed now and this is an exciting switch for us.  You should see quicker turns on rated orders and also more Pre-Rated grippers.      


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#19 ONLINE   Electron

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Posted 06 September 2014 - 04:58 PM

Two things.

1. That's a very generous donation from Joe that will be great for your back.
2. It may be time to rethink the name "Redneck Gripper Calibration" and instead go with Joe's proposed "Digital Dinamometer Method" in order to lend the sport some more legitimacy in the eyes of new athletes.
If CPW leads by example, the change will be relatively easy for both pros and newcomers to swallow.

#20 ONLINE   Chez

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Posted 06 September 2014 - 06:34 PM

You are always improving Matt. You run a fantastic business. Thank you for all the hard work.  


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