Hand Crank (Crane Scale) RGC Device

[C8Myotome]

4 hours ago, matek said:

What we see in the GD video is definitely expensive to fabricate (at the same quality), so not many people would want to buy it. Given Cannon's cheap rating service, it won't make much sense if somebody lives in the US. Maybe if somebody wants to rate a ton of grippers... Or just want a cool rating device (I want it as well)

But anyway, there would be a huge shipping fee to everywhere outside Korea, because I bet that thing is heavy.

I think GD doesn't sell those simply because it wouldn't be profitable enough for them, given how much profit they make internationally on their other products.

I think people should be figuring this stuff out now because I assume at some point Cannon will want to retire, and there will come a point in the future that nobody is selling pre-rated grippers (at least in the volume we are used to), and rate and return though other people probably would never be as cheap and time efficient as how Cannon handles it. Eventually at some point (I'd guess around 20 years from now) people will probably need to become some level of self sufficient with rating grippers. I think it would be very difficult to find someone who pays as much attention to detail as Cannon does, by the time he will want to retire in the future

For people that have like 10 grippers and that's it it probably won't be a bit deal but for people who file half their collection (like me) or just own a large amount of grippers, it just becomes more realistic to learn how to do it yourself also, in an an as accurate and least time consuming way possible...when you are closing high level grippers it really is important to know how heavy things actually are to train effectively, and the ratings of grippers you already own and have already have had rated can still change over time

Edited September 6 by C8Myotome

[marko]

3 hours ago, matek said:

What we see in the GD video is definitely expensive to fabricate (at the same quality), so not many people would want to buy it. Given Cannon's cheap rating service, it won't make much sense if somebody lives in the US. Maybe if somebody wants to rate a ton of grippers... Or just want a cool rating device (I want it as well)

But anyway, there would be a huge shipping fee to everywhere outside Korea, because I bet that thing is heavy.

I think GD doesn't sell those simply because it wouldn't be profitable enough for them, given how much profit they make internationally on their other products.

I agree. At $5 per gripper and an average of 50 grippers, you may approach break-even. However, there's potential for a DIY kit with various build methods. You could sell a small prefabricated assembly kit, including the gripper mount, brackets, and a materials list. Many can source and cut square steel, but the challenge lies in the machined parts or those requiring a plasma cutter, torch, or intricate grinding.  This would be a cool community project to launch.

Now after seeing the example with the AASS RGC rack mount, a harbor freight winch, and a crane scale is likely the easiest answer.  The most rewarding would be a community collaboration to create an assembly instruction and for purchase kit.

[matek]

8 hours ago, C8Myotome said:

I think people should be figuring this stuff out now because I assume at some point Cannon will want to retire, and there will come a point in the future that nobody is selling pre-rated grippers (at least in the volume we are used to), and rate and return though other people probably would never be as cheap and time efficient as how Cannon handles it. Eventually at some point (I'd guess around 20 years from now) people will probably need to become some level of self sufficient with rating grippers. I think it would be very difficult to find someone who pays as much attention to detail as Cannon does, by the time he will want to retire in the future

For people that have like 10 grippers and that's it it probably won't be a bit deal but for people who file half their collection (like me) or just own a large amount of grippers, it just becomes more realistic to learn how to do it yourself also, in an an as accurate and least time consuming way possible...

I think (and hope) that there will be an alternative when the time comes.
But I agree it would be very convenient if you have a big collection.

Btw I was talking specifically about GD's machine. I understand that your solution could be realized for much, much less money. Given that you already have a power rack.

8 hours ago, marcb said:

I agree. At $5 per gripper and an average of 50 grippers, you may approach break-even.

You think so? If that's possible, that's actually not that bad. But I guess some parts would need to be simplified to get everything done for that price, because the heart of the apparatus seems to be a modified manual linear stage actuator (/manual positioning slide, or whatever is the correct English), and those can be pretty expensive already (if they can handle that much load).

8 hours ago, marcb said:

Many can source and cut square steel, but the challenge lies in the machined parts or those requiring a plasma cutter, torch, or intricate grinding

Agreed. And the quote for batches of 1 (or a few) for those parts will be expensive.

 

Edited September 7 by matek

[marko]

13 minutes ago, matek said:

I think (and hope) that there will be an alternative when the time comes.
But I agree it would be very convenient if you have a big collection.

You think so? If that's possible, that's actually not that bad. But I guess some parts would need to be simplified to get everything done for that price, because the heart of the apparatus seems to be a modified manual linear stage actuator (/manual positioning slide, or whatever is the correct English), and those can be pretty expensive already (if they can handle that much load).

Agreed. And the quote for batches of 1 (or a few) for those parts will be expensive.

 

I was thinking about a small squat rack beam with the AASS piece attached and a bracket to hold a harbor freight trailer hand winch with the crane scale in between as a POC for a desktop version.  To make one as clean as that youtube video you would need to hit the machine shop.  But given most grip home gyms are full of vintage gear, why try to build a laboratory grade version and instead create a rating standard and a cheap and simple method for folks to validate that any method and tooling they are using will be accurate to the standard.  This would ensure the simple and sophisticated setups are within a tolerance using a method that is cheap, reliable, and available world wide.  Off the top I could image some sort of material that can reacted at a known load like a fidget tool for your rgc machine.  Many building materials are engineered to some reliable failure tolerance.  The standard could use a set of known and affordable materials with a process that is standardized to validate that your setup reads the correct measurement as an outcome.  

[Keet]

On 9/6/2024 at 4:43 AM, Ben Helms said:

Ive seen a few videos on YouTube with people rating their grippers with a device thats hand cranked and measures RGC on grippers with a crane scale. FOR SOME REASON, nobody sells these, and they are all hand made and super “top secret” ive yet to find a way to purchase one so i can rate grippers in seconds and compare my ratings on my AASS rig and with CPW. Id love to have one but it seems impossible and im not really sure how to create one. If anyone knows where to get one id really appreciate it. Ive been looking for months and finally caved, so I chose to create a post on The Grip Board. 

They are not top secret but simple af. So there are no straight forward blueprints, as it's a diy. There's just no market to build them in decent quantity and good quality. I've seen people make them out of scrap wood and a screw jack.

I can share dxf files for laser/plasma cutting, but as I made mine of what I had in junk box, there will be some extra lathe turning and hand filing.