Airtac SAID125 Double Rod Cylinder SAID125BX155
The AirTAC Airtac SAID125 Double Rod Cylinder SAID125BX155 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 155mm stroke, G1/2 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ125 mm
- Stroke155 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SAID125 Double Rod Cylinder SAID125BX155
The AirTAC SAID125X155 is a double-acting, double-rod profile cylinder built to ISO 15552 dimensional standards. A single piston drives a rod out of both end covers, yielding identical annulus areas on each side. This means the extend and retract forces are perfectly equal, delivering 5734 N of thrust and pull each way at 0.5 MPa. The PT tapered port thread and 32 mm rod diameter are fixed by the 125 mm bore. Because the requested 155 mm stroke is non-standard, this unit is provided as a made-to-order configuration.
This variant features SUS304 stainless steel rods (material code B) on both ends, providing excellent corrosion resistance for harsh or washdown environments. The extruded aluminum barrel includes sensor grooves on both sides, ready to accept position switches. The rear rod extension is highly useful for mounting a secondary cam, a position flag, or driving a separate mechanism, while simultaneously keeping the load guided against rotation.
Airtac SAID125 Double Rod Cylinder SAID125BX155 Technical Specifications
| Model | Airtac SAID125 Double Rod Cylinder SAID125BX155 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 155 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| 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, 40 mm |
| Max stroke | Up to 1500 mm |
Specifications follow the official AirTAC SAI series datasheet and ISO 15552 dimensions. Confirm against the product label before installation. Port options: G (BSPP) / NPT.
Theoretical Output Force (Ø125mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 6136 N | 5734 N |
| 0.7 MPa | 8590 N | — |
| Max (@1.0 MPa) | 1251 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAID125 Double Rod Cylinder SAID125BX155
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×155 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related SAI-family variants: SAID (double rod), SAIJ (adjustable stroke), SAIL (with lock), SAIF (with valve), BSAI (enclasp / clamp-lock), and SAI-S with built-in magnet. Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B); seals: TPU (blank) / Viton H / NBR N.
Where the Airtac SAID125 Double Rod Cylinder SAID125BX155 Is Used
Anti-Rotation Slides
The twin rods exiting both ends keep heavy transferred loads perfectly guided and resistant to rotational torque during high-speed positioning.
Symmetric-Force Transfer
Ideal for pushing and pulling heavy pallets where equal 5734 N force and identical transit speeds in both directions are critical for process stability.
Through-Rod Sensing
Mount a position flag or cam on the rear rod to trigger external proximity sensors, keeping the primary work area clear of obstructions.
Is the Airtac SAID125 Double Rod Cylinder SAID125BX155 the Right Cylinder?
Choose this 125 mm bore when the 80 mm bore (2268 N at 0.5 MPa) is insufficient for moving heavy symmetric loads. The twin-rod architecture is selected over a single-rod SAI when an application requires equal push and pull speeds, dual-side guidance to prevent rotation, or a rear-rod output for secondary actuation. Mounting options include the reduced SAID set: Basic, FA, LB, TC, FTC, TCM1, and TCM2 (omitting FB, CA, CB, and CR). Because the stroke is 155 mm, the overall length is longer than a single-rod unit, requiring extra rear clearance for the protruding rod.
As a standard double-acting cylinder, the SAID does not hold its position if air pressure is lost or the valve is centered; the piston will drift. If dead-load holding or drop prevention is required, consider the SAIL (air-released lock) or BSAID (clamp-lock) variants. This model is dimensionally interchangeable per ISO 15552, serving as a drop-in replacement for other ISO 15552 double-rod cylinders.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for sensors?
- ✓ Side load — consider a guided cylinder
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Avoid side load on the piston rod.
- check Adjust end cushion screws for smooth stops.
- check Use correct mounting accessory (FA/FB/CA/CB/LB/TC).
- check Installation by qualified personnel per AirTAC docs.
Airtac SAID125 Double Rod Cylinder SAID125BX155 FAQ
Because the double-rod design creates equal effective piston areas on both sides, it provides 5734 N of force in both extend and retract directions at 0.5 MPa, and 8028 N at 0.7 MPa.
Yes, the SAID125X155 is dimensionally interchangeable per ISO 15552 and serves as a drop-in replacement for other ISO 15552 double-rod cylinders, utilizing a PT G1/2 port.
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Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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