Threaded Rodless Cylinders
Last Updated: April 1, 2025
Description
Threaded rodless cylinders are a type of linear actuator that facilitate linear motion without the need for an external rod. They are designed to move loads along a linear path by utilizing an internal mechanism that eliminates the need for a protruding rod, making them compact and efficient for space-constrained environments.
Working Principle
Threaded rodless cylinders operate by using a magnetic coupling mechanism. The carriage, which carries the load, is attached to a magnet on the piston inside the cylinder. A corresponding high-strength magnet is part of the cylinder carriage. The magnetic attraction between these two components allows the carriage to move along the outside of the cylinder. This design is particularly useful as it prevents contaminants from entering the cylinder, ensuring a clean and efficient operation. The magnetic coupling also allows for easy re-coupling of the carriage to the piston by simply positioning the carriage over the piston inside the cylinder.
Applications
Unfortunately, specific applications for threaded rodless cylinders are not detailed in the provided documents. However, rodless cylinders in general are often used in automation systems, material handling, and packaging machinery due to their compact design and efficient linear motion capabilities.
Advantages over other Rodless Cylinders
Threaded rodless cylinders, particularly those with magnetic coupling, offer several advantages over other types of rodless cylinders. They are compatible with low-pressure hydraulic services and allow for easy re-coupling of the carriage to the piston. This feature can be particularly beneficial in applications where frequent disassembly and reassembly are required.
Limitations
One of the primary limitations of magnetically-coupled rodless cylinders is their higher cost compared to other types. Additionally, they may experience uncoupling at high speeds or during hard deceleration, which can limit their use in high-speed applications.
Considerations
When considering the use of threaded rodless cylinders, it is important to evaluate several factors:
- Initial Costs: These cylinders tend to have a higher initial cost due to their complex magnetic coupling mechanism.
- Operating Expense: The operating expenses may be lower due to reduced maintenance needs, as the enclosed design prevents contaminant ingress.
- Durability: The enclosed design enhances durability by protecting internal components from environmental factors.
- Accuracy: The magnetic coupling provides precise control over the carriage movement, contributing to high accuracy in positioning.
- Replacement and Maintenance Costs: Maintenance costs are generally lower due to the reduced risk of contamination and wear on internal components. However, if the magnetic coupling fails, replacement costs can be significant.
from Jergens, Inc.
Jergens Threaded Body Pressure Point Cylinders may be used with any power source and are designed for use in restricted areas where space is at a minimum. They can be used to eliminate part distortion during machining operations or to hold large-diameter castings or rings in place while machining... [See More]
- Mounting: Threaded
- Rated Load/Force: 1000
- Stroke: 0.1875
- Operating Pressure: 5000
from Jergens, Inc.
Jergens Miniature Cylinders feature fully-threaded bodies ensuring easy mounting and simple length adjustments. Their hardened piston rods, steel bodies, alloy springs, and Teflon ® back-up rings ensure trouble-free operation and long life. Features, Benefits, & Product Specifications:... [See More]
- Mounting: Threaded
- Rated Load/Force: 3925
- Stroke: 0.5000
- Operating Pressure: 200 to 5000
from PHD, Inc.
PHD ’s Series SFM Multiple Position Slide offers a modular multi-position stop system that includes optional mid-position actuators and adjustable end stops to support diverse applications. Multiple intermediate stopping positions are available, limited only by the length of the slide. The New... [See More]
- Mounting: Threaded
- Operating Pressure: 36 to 116
- Stroke: 1.97 to 134
- Bore Size: 1.06 to 1.57
from Tolomatic
6 porting options w/ cross over porting capabilities, max load of 1454 lbs [See More]
- Mounting: Floating Mount Bracket (optional feature); Foot; Threaded; Tube Supports
- Operating Pressure: 0.0 to 100
- Stroke: 205
- Bore Size: 1.5
from PHD, Inc.
Series SFP Slides feature rail bearing technology to provide smooth, precise linear motion with high accuracy within confined spaces. The Series SFP Slide is designed with a stainless steel outer band and saddle scraper seal to enclose the bearing system and continuously protect the slide's internal... [See More]
- Mounting: Threaded
- Operating Pressure: 36 to 116
- Stroke: 0.9843 to 134
- Bore Size: 1.06 to 1.57
from Tolomatic
Max load capacity of 2008 lbs, able to deliver force of 314 lbs at 100 psi [See More]
- Mounting: Floating Mount Bracket (optional feature); Foot; Threaded; Tube Supports
- Operating Pressure: 0.0 to 100
- Stroke: 120
- Bore Size: 2
from Tolomatic
Accommodates thrust up to 30 lbs, customer-specified stroke lengths [See More]
- Mounting: Foot; Threaded; Tube Supports
- Operating Pressure: 0.0 to 100
- Stroke: 211
- Bore Size: 0.6250
from Tolomatic
Accommodates thrust up to 78 lbs, customer-specified stoke lengths [See More]
- Mounting: Floating Mount Bracket (optional feature); Foot; Threaded; Tube Supports
- Operating Pressure: 0.0 to 100
- Stroke: 210
- Bore Size: 1
from Tolomatic
Maximum thrust of up to 122 lbs, customer-specified stroke lengths [See More]
- Mounting: Floating Mount Bracket (optional feature); Foot; Threaded; Tube Supports
- Operating Pressure: 0.0 to 100
- Stroke: 209
- Bore Size: 1.25
from Tolomatic
Max thrust 176 lbs, excellent for applications of moderate to heavy loads [See More]
- Mounting: Floating Mount Bracket (optional feature); Foot; Threaded; Tube Supports
- Operating Pressure: 0.0 to 100
- Stroke: 206
- Bore Size: 1.5
from Tolomatic
Accommodates loads up to 270 lbs, with customer-specified stroke lengths [See More]
- Mounting: Floating Mount Bracket (optional feature); Foot; Threaded; Tube Supports
- Operating Pressure: 0.0 to 100
- Stroke: 156
- Bore Size: 2
from Tolomatic
Space-saving profile, accommodates loads up to 370 lbs, "custom-made" [See More]
- Mounting: Floating Mount Bracket (optional feature); Foot; Threaded; Tube Supports
- Operating Pressure: 0.0 to 100
- Stroke: 211
- Bore Size: 2.5
from Tolomatic
Cylinders can be isolated from any work area with extended cable lengths [See More]
- Mounting: Threaded
- Operating Pressure: 0.0 to 100
- Stroke: 20.4
- Bore Size: 0.5000
from Tolomatic
Option of auto tensioner with one or two 1" stroke units [See More]
- Mounting: None; Threaded
- Operating Pressure: 0.0 to 100
- Stroke: 126
- Bore Size: 1.5
from Tolomatic
Double the velocity and stroke capacity of double-acting cylinders [See More]
- Mounting: None; Threaded
- Operating Pressure: 0.0 to 100
- Stroke: 126
- Bore Size: 1.5
from Tolomatic
Self-supporting slide system, increased torsional stability [See More]
- Mounting: Foot; Threaded; Mounting Plates
- Operating Pressure: 0.0 to 100
- Stroke: 72
- Bore Size: 0.5000
from Tolomatic
Precision linear ball bearings allows the slide to operate in any attitude [See More]
- Mounting: Foot; Threaded; Mounting Plates
- Operating Pressure: 0.0 to 100
- Stroke: 72
- Bore Size: 1
from Tolomatic
No mechanical piston connection, actuator block can be easily rotated [See More]
- Mounting: Floating Mount Bracket; Foot (optional feature); Threaded
- Operating Pressure: 0.0 to 100
- Stroke: 26
- Bore Size: 0.2500
from Tolomatic
Accommodates the most demanding application environments [See More]
- Mounting: Foot (optional feature); Threaded
- Operating Pressure: 0.0 to 100
- Stroke: 30
- Bore Size: 0.3750
from Tolomatic
Ideal for vertical lifting applications [See More]
- Mounting: None; Threaded
- Operating Pressure: 0.0 to 100
- Stroke: 20.4
- Bore Size: 0.7500
from Tolomatic
Al bearing block guides & supports loads on precision linear ball bearings [See More]
- Mounting: None; Threaded
- Operating Pressure: 0.0 to 100
- Stroke: 20.4
- Bore Size: 0.5000