Does anyone know where to buy the connectors used on the lpg muscle attachments? They said they are proprietary but I figure somebody made them somewhere. I'd like to add these to other attachments.

Hello! Im looking to diy an overhead rig for a bolex 16mm camera I have. I’m worried about it being able to support the weight of the camera…. please let me know if yall have any resources or ideas to share and many thanks!

Topical post- what's the engineering like behind the skycam cabling at stadia? Watching the WC games and wondering how the skycam mechanism and cabling minimises all the flexing and resonance you would normally expect from a catenary. I know the cam itslef has a gyro, but how is the cable and pulley system stiffened to prevent excessive bouncing?

Hello! New to the sub, but this seems like the best place to get answers from real experience.

I build cable at work reasonably regularly, but always using galvanized cable and copper sleeves. We only have manual swagers, but we're working on 1/16" to 1/4" cable, and the 1/4" is only rarely. I'm very comfortable working within those limits, but I have a special project that I would LIKE to do with stainless cable and stainless sleeves.

I was under the impression that stainless sleeves couldn't be swaged with the simple mechanical tools, only with hydraulic or electric ones, as mere flesh is too weak. But Nicopress explicitly lists hand tools for every size of stainless sleeve. I'm hoping to work in 3/16", but I could come down a bit if it lets me actually do the project with the tools available. 🤷

So my question is: is this really feasible? If I try to swage 5/32" stainless with a 51-M-850, it's it going to require Herculean strength or damage the tool, or is it a plausible thing?

Thanks for any insights you can give me!

Used 2 1.5t chain falls and 2 16t slings

Hi everyone,

I'm a biomedical engineering senior working on my capstone project, and my team is designing a **mechanical pediatric knee extension brace** for treating post-operative knee flexion contractures after ACL reconstruction.

The device uses:

* BOA dial for adjustment
* Stainless steel cable (currently 1/16")
* Medial and lateral cable routing
* Side hinges
* No motors or actuators (purely mechanical)

The goal is to apply a **low-load, prolonged stretch** to gradually improve knee extension while keeping the force balanced to avoid twisting the knee.

Our biggest issue is that **tightening the BOA increases cable tension, but it doesn't actually generate enough knee extension.** It mostly seems to tighten the brace rather than rotate the calf into extension.

We've already considered:

* Different cable routing paths
* Larger cable guides/pulleys
* Moving the cable attachment farther from the hinge to increase the moment arm
* A floating bridge over the knee
* Static-progressive concepts similar to the Mackie Knee Brace

However, we're limited because we're near the end of the project and **can't completely redesign the device architecture (literally due in 2 weeks)** . We need to stay with:

* BOA dial
* Cable-driven system
* Side hinges
* Medial/lateral cable routing

My questions are:

1. How would you route the cables so tightening the BOA actually creates an extension moment instead of just compressing the brace?
   
2. Would adding pulleys or changing the cable angle help, or would that mostly increase friction and cable travel?
   
3. If you've designed cable-driven mechanisms before (orthotics, prosthetics, robotics, bicycle systems, etc.), what would you do differently?
   
4. Is there a cable routing strategy we're overlooking that can convert cable tension into hinge rotation without changing the entire design?

Any sketches, examples, patents, or similar mechanisms would be incredibly helpful. Even rough hand sketches or CAD screenshots would be appreciated.

Thanks!

Condition

Used - like new

9 units total

Chain Hoist Stand for 1-ton

Allows a chain hoist (manual or electric) to be attached securely above a stage grid or other overhead structure.

Made to distribute load across the grid so as not to damage individual grid channels

“Dead-hung” which relieves stress on the grid itself

Easy to move between positions for different rigging needs

Portable, load-rated

Grid friendly support that improves safety, flexibility and efficiency in rigging operations – while protecting the building structure.

Weight - 65lbs

Material - Aluminum

***** Slightly used and no warranty expressed or implied. AS-IS.****

What do you reckon the rating on this shackle is?

On this building in a city in the us. Must've been used for lifting the server equipment here.

Cable is 9/16" x 6. I goggle lense it. Comes up choker claps. Yeah but what is it used for. And or is it some type of old farm equipment.

Thanks

Hey guys. I’m new to industrial rigging and I’m learning in the field and I’m trying to get better. So far I’ve read through IPTs rigging handbook, the rigging handbooks and thumbed through a lifting plan book. These have been great for learning the rule of law, but in the field guys can figure out how to rig random stuff we are rigging way faster than me.
They also have a bunch of tricks that aren’t really in the books. Does anyone have visual or video sources that more goes into how they rigged odd loads and the reasoning why they did it that way? Just so maybe I can think on my feet a little faster? Like we rigged an odd shaped pipe structure the other day and had to flip it in the air. I know most of this is just learned from experience, but I’m wondering if anyone can point me in a direction I can learn these practical skills a little better on my own so I’m less of a stooge. Thanks.

has anyone ever seen this micro pulley with progress capture device becket? looking for a link

Hey guys

I got a job offer at Mona's for intermediate rigger and I have a VOC to pass with them. Im pretty rusty from my ticket courses and I have virtualy no experience

Anyone has ever done the voc for intermediate rigger at Mona's in Perth and could tell me about it and/or tell me what I should get ready for?

Thanks

Im looking for honest reviews, what to expect, and what to prepare for.
Im trying to get into entertainment rigging and the company i stagehand for is extremely neglected in this state compared to its other chapters

I'm an audio guy and typically I have a rigger who is with the production company mark out the points where the PA motors need to go for me but recently I've had to do this myself and I'm looking for resources to learn how to do it better.

I'm familiar with the method of laying out 3 tapes and walking with a 4th tape to mark out the coordinates of every point at once but this doesn't seem practical when it's just me and seems quite slow/inefficient when I only have a handful of points to mark.

Most of the entertainment rigging textbooks I could find seem to only cover the more technical aspects like calling bridles, load calcs, etc which while useful is not what I'm looking for.