Bilink’s seated calf extension exercise is to specifically target and strengthen the calf muscles, primarily the gastrocnemius and soleus. By sitting in a machine with a padded lever on top of your knees and your feet positioned on a platform, you can effectively isolate the calves and perform controlled repetitions of calf raises. This exercise helps to improve calf strength, enhance lower leg stability, increase ankle mobility, and contribute to overall lower body strength and muscular development.


The main frame of the small door: Use a large D-shaped pipe diameter to make the main frame of the small door

Appearance: Brand new humanized design, this appearance has been patented

Tube type: D-type tube 53*156*T2.5mm, flat oval tube 50*100*T2.5mm

Movement trajectory: Smooth movement trajectory is more in line with ergonomic principles

Guard plate: Made of high-quality Q235 carbon steel plate and thickened acrylic

Handle decorative cover: made of aluminum alloy

Steel wire rope: high-quality steel wire rope with a diameter of about 6mm, composed of 7 strands and 18 cores, wear-resistant, strong and not easy to break

Seat cushion: polyurethane foaming process, surface made of microfiber leather fabric, waterproof and wear-resistant, multiple colors available

Frame paint surface: automotive grade baking process, bright color, long-term rust prevention

Pulley: One-time injection molding of high-quality PA, high-quality bearings injected inside, smooth rotation and no noise


Product Name Leg Curl Machine
N.W.: 280kgs/617lbs
G.W.: 295kgs/650lbs
Installation size: 1485*1255*1470mm/ 58*49*58inch
Counterweight: 70kg
Weight stacks: 70kg-14pcs/154lbs-14pcs

Leg Curl Extension

Leg Curl Design line draft


It is a natural path of motion. Thigh pads easily adjust to provide stability and comfort, and ergonomically rotating handles allow for natural user defined movement, greater variety, and increased muscular involvement.

Clear and concise muscle targetmakes it easier for trainers to know and learn;Humanization design adjustment.Trainers can adjust the positionaccording to personal body condition

Installation size:1485*1255*1470mm/ 58*49*58inch

High density foam upholstery, “furniture grade” PU leather, and integral ABS guard cover.

POM material pulley , CNC processing, customized high quality bearing to withstand High-intensity and long-term use.

Full shroud, 4mm thickness ABS virgin material, durable and eco friendly.

PU leather cushion,air permeability,sweating,comfort and anti-skid;Fitness equipment uses 6mm thick steel cable,which is more durable and safe

Quick Judgement Tips

We have prepared some little knowledge about fitness equipment for you


Check whether there is an R&D center to design its own strength equipment; talk with the designers about design concepts.

#Movement Angle

Ask designers at the R&D center if they usually work out with gym equipment. Designers who do not work out with gym equipment should never design any strength training machine.

You should try the fitness equipment yourself. You need to experience the following three aspects:

Whether it is smooth to use.

Whether specific equipment is activating your targeted muscle group.

For converging and diverging equipment, whether there is a peak contraction experience.


Know about the specific treatment methods applied to the surface.

Check if the surface is smooth to the touch.

Take a hard metal object, such as a key, and scratch the surface of the equipment in order to see the adhesion of the surface coating.

#Frame Pipe

Pipe standard: ask the supplier about the standard of this pipe. In China, for example, you should expect fitness equipment pipes to meet Q235 standard.

Pipe Size: Look for 40mm x 80mm and above for the length and width of the frame pipe, preferably with 3.0mm in thickness.

Treatment: bending production procedure is preferred over cutting and welding.

Check the thickness of the raw material, not the the painted tube.


Ask the factory representative about the treatment methods, as well as the theoretical basis of the connection.

Check the thickness of the connecting plate and the strength of the screw.


-Seat Fillings:

Press the seat firmly with your thumb or apply a specific instrument to measure its density level.

-Seat Leather:

Smell: Check whether there is any pungent smell.

Tactile impression: Touch the surface by hand and confirm the tactile impression.

Density: Observe from the cut/side surface and check its stomata; the more stomata there is, the lower the density and quality.

Thickness: Check the thickness of the material; the thicker, the better;

-Seat Support Plate

Check the material used. Generally speaking, ABS is better than iron board and plywood.

Check the appropriateness of the match between fillings and support plate.

-Seat Adjuster

Adjust the seat several times to check whether it is easy to use. After adjusting the seat, sit on it and shake to test its stability.



Material: Determine the material used and assess whether it is appropriate based on our comparison chart.

Stability: Make the pulley rotate and observe whether it wobbles.


Determine the material applied and assess whether it is suitable according to the comparison chart.

Check whether the pulley and CAM are smooth when used.

Use the machine and confirm whether its design is in line with the principle of movement.


Check the thickness of the cable; the thicker it is, the more solid the cable will be.

If you buy for commercial use, never be cheated by manufacturers who apply home use material to industrial equipment.

Ask about the maximum load capacity along with fatigue test report and check the results.


Meet the standard ISO20957: Check whether there is a certificate of ISO20957, which means the equipment has passed the International Organization for Standardization.

Stability: Try to push a pin-loaded machine to check if it is stable. On machines like the Lat Pulldown, select the maximum weight, then suddenly loosen the handle to see if the device is still stable.

Total net weight: subtract the weight plates; the heavier, the safer.

Overall structure: the surface of the fitness equipment pipe should be free of any protrusions so as to avoid injury.

The edges and corners of the surface should have a radius r ≥ 2.5mm. They should also be free of burrs and make use of round corners.

tube ends: All the tube ends should be in the accessible hand, and the foot area should be closed off.

You should be able to stop the motion at any time.

The weight selection pin should be fitted with a holding system to prevent accidental change or movement during exercise.

Gym Exercise

Manufacturing Process



Bending is commonly used in the fabrication of fitness equipment to create components such as frames, handles, supports, and brackets.




Cutting is an essential step in the manufacturing of fitness equipment as it helps shape various components and parts.




Stamping involves placing a metal workpiece between dies and applying pressure to deform the material into the desired shape.




Welding in fitness equipment manufacturing is to create strong and permanent connections between various parts, ensuring structural stability, durability, and safety.




Sandblasting involves propelling fine granular materials, such as sand or abrasive particles, at high speeds onto the surface of the metal using compressed air or a specialized sandblasting machine.


Power Coating

Power Coating

Powder coating involves the application of a dry powder, typically made of finely ground particles of resin, pigment, and additives, to the surface of the metal.




Assembly&Test ensure that the fitness equipment is properly constructed, functions correctly, and meets quality standards before it is ready for use by consumers.




Packaging serves multiple purposes, including protecting the fitness equipment during transit, providing information to consumers, and enhancing the overall presentation and marketability of the product.


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