Airtac SCD Standard Cylinder SCD50X250S
The AirTAC Airtac SCD Standard Cylinder SCD50X250S is a genuine double-acting DOUBLE-ROD air cylinder: the Ø20mm piston rod extends from BOTH end caps, giving equal effective area — and therefore equal force — in push and pull. Ø50mm bore, 250mm stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Rod (both ends)Ø20 mm
- Stroke250 mm
- Port sizePT1/4
- Rod configDouble rod (through)
- CushionAdjustable, 21 mm
About the Airtac SCD Standard Cylinder SCD50X250S
The SCD50X250S is a double-acting, double-rod pneumatic cylinder that provides identical thrust in both directions—825 N at 0.5 MPa—because the 20 mm rod passes through both end caps. This symmetry makes it ideal for applications where a tool or sensor flag must be mounted on the rear rod, or where equal speed and force are required for a two-sided process. The built-in magnet (denoted by the -S suffix) allows CMSG, DMSG, or EMSG reed and solid-state sensors to clamp directly onto the tie-rod barrel for precise, non-contact end-of-stroke detection.
With a 250 mm stroke, this model stays well within the 1200 mm maximum standard stroke for the 50 mm bore. The adjustable air cushion at each end (21 mm cushion length) decelerates the piston smoothly, reducing impact noise and vibration. The body length A(SCD) is 207 mm, making the overall retracted length longer than an equivalent single-rod SC cylinder due to the rod protruding from both ends. Ports are PT1/4, and the standard rod thread is M16x1.5.
Airtac SCD Standard Cylinder SCD50X250S Technical Specifications
| Model | Airtac SCD Standard Cylinder SCD50X250S |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø50 mm |
| Rod diameter | Ø20 mm (both ends) |
| Stroke | 250 mm |
| Rod configuration | Double rod — rod through both caps |
| Acting type | Double acting |
| Port size | PT1/4 |
| Rod thread | M16×1.5 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Adjustable, 21 mm |
| Max stroke | Up to 1200 mm |
Specifications follow the official AirTAC SCD (double-rod) datasheet. Because the rod runs through both caps, the effective area is (bore² − rod²) in both directions. Confirm against the product label before installation. Thread options: PT (standard) / G.
Theoretical Output Force (Ø50mm, double rod)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 825 N | 825 N |
| 0.7 MPa | 1155 N | 1155 N |
| Max (@1.0 MPa) | 168 kgf | |
Push and pull are EQUAL on a double-rod cylinder — both chambers lose the rod area, so effective area = (bore² − rod²) each way. Actual usable force is lower than theoretical due to friction and back-pressure; size with a safety margin.
Model Code: Airtac SCD Standard Cylinder SCD50X250S
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 50 | Bore size in mm. |
| ×250 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related types: SC (single rod), SCJ (adjustable stroke), SCT (multi-position). SCD mounting: Basic, FA, LB, TC, TCM1. Seals: TPU standard / H = Viton / N = NBR. Thread: blank = PT, G = G thread.
Where the Airtac SCD Standard Cylinder SCD50X250S Is Used
Two-Sided Actuation
The through-rod design allows tooling to be mounted on both ends, enabling the cylinder to perform work in two separate stations simultaneously with perfectly synchronized, equal force in each direction.
Rear-Position Sensing
The built-in magnet and exposed rear rod provide an ideal location to mount a sensor flag or cam for end-of-stroke detection, keeping the primary tooling area on the front rod clear and uncluttered.
Anti-Rotation & Better Guidance
The dual-rod support provides superior resistance to rod deflection and rotation compared to a single-rod cylinder, making it suitable for light pushing and transfer tasks where a dedicated guided cylinder is not required.
Is the Airtac SCD Standard Cylinder SCD50X250S the Right Cylinder?
Choose the SCD50 bore when your application needs around 825 N of balanced force at standard plant pressure. If you require more thrust, stepping up to the SCD63 bore provides 1402 N at the same 0.5 MPa, while the SCD40 bore offers 528 N for lighter, more compact assemblies. This double-rod design is the correct choice when you need to attach tooling to both ends of the piston rod or require better rod guidance than a single-rod SC cylinder; however, for significant side loads, an external guide rail or a dedicated guided cylinder is still necessary. For a direct replacement, match the 50 mm bore, 250 mm stroke, PT1/4 port thread, basic mounting, and the -S magnet option on the new SCD50X250S.
Double-rod checklist
- ✓ Need equal force / speed both directions?
- ✓ Rear rod for tooling, stopper or sensor flag?
- ✓ Better rod guidance / anti-rotation?
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for sensors?
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Keep BOTH rod ends clear of side load and interference.
- check Adjust end cushion screws for smooth stops.
- check Use SCD mounting accessory (FA / LB / TC / TCM1).
- check Installation by qualified personnel per AirTAC docs.
Airtac SCD Standard Cylinder SCD50X250S FAQ
Because it is a double-rod cylinder, the push and pull forces are identical. The effective piston area is calculated by subtracting the 20 mm rod area from the 50 mm bore area. This results in 825 N at 0.5 MPa, 1154 N at 0.7 MPa, and 1484 N at the maximum operating pressure of 0.9 MPa.
Select the SCD when you need to mount a load or sensor on both ends of the piston rod, require perfectly equal force and speed in both directions, or want the improved bearing support and anti-rotation characteristics that a through-rod provides. If you only need to push from one side, the single-rod SC series is a more compact and economical choice.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC SCD Double-Rod Cylinders
Request a Quote for Airtac SCD Standard Cylinder SCD50X250S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.