An air cylinder with spring return uses compressed air for one stroke and an internal spring to return the rod when pressure is released. The options below include compact, short-stroke, and longer-stroke models. The ManiCrown cylinder is best for buyers who want a stated operating-pressure range; Bimba models suit specific short strokes; and SMC models offer stainless steel bodies in several stroke lengths.
| Product | Best For | Key Specification |
|---|---|---|
| ManiCrown MTA16 | Compact applications with defined pressure requirements | 100 mm stroke; 0.15–0.8 MPa |
| Bimba 041 | One-inch-stroke applications | 3/4-inch bore; front nose mount |
| SMC NCMB075-0100S | Short-stroke applications needing a stainless body | 1-inch stroke; 1/8-inch NPT |
| SMC NCMB106-0200S | Two-inch-stroke linear motion | Stainless steel; 2-inch stroke |
| SMC NCMB106-0400S | Applications requiring a longer stroke | Stainless steel; 4-inch stroke |
ManiCrown MTA16 Spring Return Cylinder
This single-acting cylinder has a built-in spring that retracts the rod when air pressure is released. Its compact round body is intended for equipment with limited mounting space, including assembly stations and machinery. The listed 100 mm stroke and stated operating range of 0.15–0.8 MPa make it easier to compare against a system’s required travel and pressure.
Best for: Buyers who need a compact cylinder and want a specified pressure range and temperature range of -20 to +80°C. The listing identifies clamping, safety circuits, and emergency-stop applications as potential uses.
Limitation: Confirm the bore, mounting details, and force requirements before ordering; the provided features do not specify these measurements.
Bimba 041 One-Inch Stroke Cylinder
The Bimba 041 is a single-acting, spring-return pneumatic cylinder with a 3/4-inch bore, one-inch stroke, and front nose mounting. These dimensions make it a direct candidate when the required travel is one inch and the mounting layout calls for a front nose mount.
Best for: Buyers matching a specific 3/4-inch bore and one-inch stroke. It is a better fit than a longer-stroke option when the application needs only one inch of movement.
Limitation: The supplied product details do not state the port size, operating pressure, or body material. Check those requirements against the complete product information before selecting it.
SMC NCMB075-0100S One-Inch Cylinder
This SMC model is a single-acting, round-body cylinder with a spring-return rod, stainless steel body, 3/4-inch bore outside diameter, and one-inch stroke. It has a 0.25-inch rod outside diameter and a 1/8-inch NPT port. Stainless steel is specified for resistance to corrosion and scaling.
Best for: Buyers who need a one-inch stroke, front nose mounting, and a stainless steel body. The listed port and rod dimensions help with component and layout checks.
Limitation: It is described as not switch-ready and has no cushion. Avoid this model if the application requires a switch-ready cylinder or cushioning.
SMC NCMB106-0200S Two-Inch Cylinder
The NCMB106-0200S provides a two-inch stroke in a single-acting, spring-return design. Product details list a stainless steel round body, 1-1/16-inch bore outside diameter, 0.312-inch rod outside diameter, and 1/8-inch NPT connection. Its spring returns the rod after the air supply is released.
Best for: Linear applications needing two inches of travel and a stainless steel cylinder body. Choose it over the one-inch SMC model when the required stroke is longer.
Limitation: The listing specifies no cushion and says the cylinder is not switch-ready. Confirm that these features are suitable for the machine’s operating cycle.
SMC NCMB106-0400S Four-Inch Cylinder
This SMC cylinder shares the NCMB106 series’ single-acting spring-return operation and stainless steel round body, with a longer four-inch stroke. Its listed dimensions include a 1-1/16-inch bore outside diameter, 0.312-inch rod outside diameter, and 1/8-inch NPT port.
Best for: Buyers whose mechanism needs four inches of linear travel and who want the stated stainless steel body material. It offers more travel than the two-inch NCMB106 option.
Limitation: The longer stroke needs sufficient installation and movement clearance. This model is also listed as having no cushion and not being switch-ready.
Buying Guide: How To Choose A Spring-Return Air Cylinder
What does spring return mean?
A spring-return cylinder is single-acting: compressed air drives the piston in one direction, while an internal spring moves the rod back when pressure is removed. This differs from a double-acting cylinder, which uses air pressure for both directions. Check that the return spring can perform the required return movement in your application.
How much stroke do you need?
Choose a stroke that matches the required travel. The products here range from one-inch Bimba and SMC options to two- and four-inch SMC models, while the ManiCrown listing specifies 100 mm. Compare units carefully, and allow the machine enough room for the full rod movement.
Which dimensions and connections should you verify?
Confirm bore, rod diameter, port thread, mounting style, and available space before ordering. A matching stroke alone does not establish fit. Front nose mounting is specified for the Bimba and SMC products; the SMC listings also provide port and rod dimensions. The ManiCrown features provided do not list bore or mounting measurements.
Does body material or cushioning matter?
SMC’s listed cylinders have stainless steel bodies, which the product details describe as resistant to corrosion and scaling. The SMC models are also listed as having no cushion and not being switch-ready. Check whether the environment, end-of-stroke behavior, or machine controls call for different specifications.
Frequently Asked Questions
Does a spring-return cylinder need two air ports?
No. The SMC listings describe a single-acting cylinder with one air port and spring-return action. Air drives one stroke; the spring returns the rod when pressure is released.
Can these cylinders retract without air pressure?
The listed spring-return designs use an internal spring to retract the rod when air pressure is released. Confirm the cylinder’s specified operating conditions and application requirements before use.
How do I compare bore sizes?
Compare the bore specification with the force and fit requirements of your system. Do not assume that bore outside diameter and piston bore are interchangeable measurements; verify the manufacturer’s dimensional details.
Are all the products switch-ready?
No. The SMC models listed here are explicitly described as not switch-ready. The supplied details do not establish switch readiness for every other model, so verify it when a sensor or position switch is required.