Airtac SCD Standard Cylinder SCD125X125S
The AirTAC Airtac SCD Standard Cylinder SCD125X125S is a genuine double-acting DOUBLE-ROD air cylinder: the Ø32mm piston rod extends from BOTH end caps, giving equal effective area — and therefore equal force — in push and pull. Ø125mm bore, 125mm stroke, PT1/2 ports and adjustable end cushioning.
- BoreØ125 mm
- Rod (both ends)Ø32 mm
- Stroke125 mm
- Port sizePT1/2
- Rod configDouble rod (through)
- CushionAdjustable, 28 mm
About the Airtac SCD Standard Cylinder SCD125X125S
The SCD125X125S is a double-acting, double-rod pneumatic cylinder that delivers identical force in both directions—5734 N at 0.5 MPa and up to 10321 N at the maximum operating pressure of 0.9 MPa. Because the 32 mm rod passes through both end caps, the effective piston area is the same on the push and pull strokes, making this actuator inherently suited for tasks where balanced thrust and speed are critical.
This model includes a built-in magnet (denoted by the -S suffix), allowing CMSG, DMSG, or EMSG reed and solid-state sensors to be mounted directly on the tie-rod barrel for non-contact position sensing. With a 125 mm stroke, adjustable air cushioning (28 mm length), and PT1/2 ports, it is a robust ISO 6430 class cylinder for symmetrical tooling or rear-side stroke confirmation.
Airtac SCD Standard Cylinder SCD125X125S Technical Specifications
| Model | Airtac SCD Standard Cylinder SCD125X125S |
|---|---|
| Series | SCD double-rod tie-rod cylinder (ISO 6430 class) |
| Bore size | Ø125 mm |
| Rod diameter | Ø32 mm (both ends) |
| Stroke | 125 mm |
| Rod configuration | Double rod — rod through both caps |
| Acting type | Double acting |
| Port size | PT1/2 |
| Rod thread | M27×2 |
| 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 – 500 mm/s |
| Cushion | Adjustable, 28 mm |
| Max stroke | Up to 1500 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 (Ø125mm, double rod)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 5734 N | 5734 N |
| 0.7 MPa | 8027 N | 8027 N |
| Max (@1.0 MPa) | 1169 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 SCD125X125S
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 125 | Bore size in mm. |
| ×125 | 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 SCD125X125S Is Used
Two-Sided Actuation
Operates tooling or clamps on both ends of the cylinder simultaneously, using the front and rear rod extensions with perfectly matched force and speed.
Non-Rotating Pusher
The through-rod design provides inherent anti-rotation stability, making it effective for pushing or ejecting parts where rod twist must be minimized without external guides.
Rear Stroke Sensing
The built-in magnet allows a sensor to be mounted on the rear barrel to confirm full retraction, a common requirement when the rear rod carries a tripping flag or secondary tool.
Is the Airtac SCD Standard Cylinder SCD125X125S the Right Cylinder?
Choose the SCD125 bore when your application needs roughly 5734 N of balanced force at standard plant pressure. If you can work with a lower force, stepping down to the SCD100 bore saves space and air consumption while still providing 3681 N each way at 0.5 MPa. For applications that only require a single working direction, the single-rod SC series is a simpler, more cost-effective alternative.
This double-rod design provides better guidance than a single-rod cylinder, but it is not a guided cylinder. For any stroke over 300 mm or when side loads are present, add an external guide or switch to a dedicated guided actuator. To replace an existing SCD125X125S, match the 125 mm bore, 125 mm stroke, PT port thread, basic mounting style, and the integrated magnet sensor option.
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 SCD125X125S FAQ
Because it is a double-rod cylinder, the push and pull forces are identical. At 0.5 MPa it outputs 5734 N, at 0.7 MPa it outputs 8028 N, and at the maximum operating pressure of 0.9 MPa it reaches 10321 N. The theoretical force at 1.0 MPa is 1169 kgf.
Choose the SCD when you need the piston rod to work on both ends of the cylinder. This is ideal for mounting a sensor flag or stopper on the rear rod, driving two separate mechanisms with one actuator, or when the superior bearing support of a through-rod helps manage light, on-axis loads without adding external guides.
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 SCD125X125S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.