Strength training without loading the grip
Strength training often relies on handles and straps that route the load through the hands, wrists, elbows or knees. For people dealing with joint pain, tendinitis, arthritis, grip problems or recovery from injury, that can make key exercises uncomfortable or impossible.
Our client’s product addresses this with a patent-pending, grip-free cable attachment that loads above the elbow or knee. Moving the load point lets users isolate the target muscle while taking stress off the joint, and the same device works for upper and lower body exercises.
The client came to CADLETE Designs to turn the idea into a manufacturable product and to manage its production and supply chain.
The goal
A reliable, consumer-ready fitness product, produced consistently at volume and delivered to market without the client managing tooling, factories or shipping.
A concept that has to take real gym loads
The cuff had to be designed from nothing, survive daily use on cable machines, mold consistently in plastic, and reach customers without the client running the logistics.
From idea to product
The client started with a concept, so the complete product had to be designed from the ground up.
Designing for plastic production
The plastic parts had to follow injection molding requirements so they could be produced consistently at volume.
A product that takes load
As an attachment used with cable machines, it had to be robust in everyday training.
A complete supply chain
Beyond design and production, the client needed a partner to manage logistics and delivery.
From concept to volume production
Five stages, shown with the real prototype, molds, molding machine and production batches from this project.
Stage 01 · Product design
The concept, designed into a complete product
We designed the product from scratch, developing the client’s concept into a complete, manufacturable design.
The cuff sits above the elbow or knee, where the cable load is taken instead of in the hand.
- Fitness product design
- Product design
- 3D CAD
An early prototype worn above the elbow. Stage 02 · Design for manufacturing
A molding-ready DFM design
We created a molding-ready DFM design for the plastic parts, preparing them for efficient, repeatable injection molding.
Early molded parts show the shape that design produced: a folded shell that wraps the limb.
- DFM
- Injection molding guidelines
Early molded parts. Stage 03 · Injection mold development
Molds machined and run by CADLETE
The injection molds were created by CADLETE.
The photos follow the tooling from machining to the mold set in the injection molding machine.
- Injection mold development
- Mold machining
Machining the mold. 
A mold half. 
The mold in the machine. Stage 04 · Volume production
Volume production, in several colors
We carried out volume production of the product.
The cuffs come off the line in several colors and are assembled with their branded inserts.
- Plastic injection molding
- Volume production
- Color options
Finished cuffs. 
Another color in production. Stage 05 · Supply chain and logistics
Produced, packed and delivered
CADLETE manages the end-to-end supply chain, logistics included, so finished products reach the client ready for sale.
The product is now sold in 27+ countries and used by professional trainers and athletes.
- End-to-end supply chain
- Logistics management
- 27+ countries
Shells from a production run. 
Assembled cuffs, ready to pack.
A patent-pending idea, now sold in 27+ countries
The cuff went from a concept to a molded, volume-produced product with its supply chain run by CADLETE. It is now sold in 27+ countries and used by professional trainers and athletes.
What we delivered
- The product designed from scratch around the client’s concept
- A molding-ready DFM design for plastic production
- Injection molds developed by CADLETE
- Volume production completed
- End-to-end supply chain and logistics managed by CADLETE
- A product now sold in 27+ countries and used by professional trainers and athletes
Questions about this project
What is a grip-free cable attachment?
It is a cuff that connects a cable machine to the arm or leg above the elbow or knee, so the load is not held in the hand. That lets users isolate the target muscle while taking stress off the joint, for upper and lower body exercises.
Can CADLETE design a fitness product from just a concept?
Yes. This product started as the client’s concept. CADLETE designed it from scratch, made it ready for injection molding, built the molds, produced it at volume and runs the supply chain.
What does DFM mean for a plastic fitness product?
Design for manufacturing shapes each plastic part so it molds efficiently and repeatably. For this cuff the parts were designed to injection molding requirements before the molds were made, so they could be produced consistently at volume.
Does CADLETE make its own injection molds?
For this product, yes: the injection molds were created by CADLETE, then used for volume production.
Can CADLETE manage the supply chain after production?
Yes. Here CADLETE manages the end-to-end supply chain, logistics included, so finished products reach the client ready for sale.
Will my product idea stay confidential?
Yes. CADLETE signs a non-disclosure agreement before any technical information is shared, so your design files and IP stay yours. It is also why this story does not name the client.
