Airtac SAI50 Standard Cylinder SAI50X135S
The AirTAC SAI50 Standard Cylinder SAI50X135S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 135mm stroke, G1/4 air ports and adjustable end cushioning. Its standardized mounting interface makes it interchangeable with other ISO 15552 cylinders at the mounting interface.
- BoreØ50 mm
- Stroke135 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 30 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 SAI50 Standard Cylinder SAI50X135S
The AirTAC SAI50X135-S is a double-acting ISO 15552 profile cylinder with a 50mm bore and 135mm stroke. It provides a theoretical push force of 982 N at 0.5 MPa, making it well-suited for medium-duty handling tasks. The extruded aluminum barrel design omits tie rods, ensuring a clean exterior that drops directly into standard ISO 15552 mounting footprints.
This specific configuration includes a magnetic piston (-S) for use with CMSE or DMSE reed switches, allowing for precise end-of-stroke position detection. The piston rod is constructed from standard carbon steel, and the barrel features integrated sensor grooves on both sides for flexible switch placement. For high-temperature environments up to 70 C, alternative seal options such as Viton (H) are available upon request.
Airtac SAI50 Standard Cylinder SAI50X135S Technical Specifications
| Model | Airtac SAI50 Standard Cylinder SAI50X135S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 135 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| 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, 30 mm |
| Max stroke | Up to 1200 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 (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAI50 Standard Cylinder SAI50X135S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×135 | 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 SAI50 Standard Cylinder SAI50X135S Is Used
Medium-Duty Clamping
Secures workpieces during machining operations, utilizing the 982 N push force to hold parts firmly against locators.
Package Diverter
Actuates a routing arm on a packaging line to sort products, using the magnetic piston to confirm stroke completion.
Gate Control
Opens and closes access gates on automated machinery, relying on the ISO 15552 interface for easy bracket mounting.
Is the Airtac SAI50 Standard Cylinder SAI50X135S the Right Cylinder?
Selecting this 50mm bore over a smaller 40mm version upgrades your push force from 628 N to 982 N at 0.5 MPa, which is necessary when moving heavier platens or overcoming significant friction. If your application requires even less force, stepping down to a 32mm bore yields 402 N. The 135mm stroke provides a specific extension length for compact machines.
Because the stroke is under 300mm, side-load stress on the rod bearing is minimal compared to long-stroke variants. However, if the assembly must maintain its position without continuous air pressure, note that the standard adjustable air cushions only decelerate the piston at end-of-stroke; they do not lock the load. For true drop-prevention, consider the SAIL variant with an air-released lock, or use an external pilot-operated check valve. This model uses PT tapered port threads and is dimensionally interchangeable with other ISO 15552 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 SAI50 Standard Cylinder SAI50X135S FAQ
At an operating pressure of 0.5 MPa, the SAI50X135-S provides a push force of 982 N and a pull force of 825 N. At 0.7 MPa, the push force increases to 1374 N.
Yes, the SAI50X135-S is a profile-type cylinder built to ISO 15552 dimensional standards. It is designed to be a direct replacement for other ISO 15552 profile cylinders with matching 50mm bore and 135mm stroke specifications.
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