Airtac SAI125 Standard Air Cylinder SAI125AX55S
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125AX55S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 55mm 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
- Stroke55 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125AX55S
The AirTAC SAI125X55-S is a double-acting ISO 15552 profile cylinder engineered for heavy-duty performance. It delivers a robust push force of 6136 N at 0.5 MPa, making it well-suited for demanding high-force clamping and pressing tasks. The 55 mm stroke is a made-to-order dimension tailored for short-travel, high-impact operations.
This specific configuration is built with a SUS420J2 stainless steel rod (material code A) for enhanced durability against moisture and wear. It includes a piston magnet (-S) to enable direct mounting of CMSE or DMSE sensor switches along the dual extruded grooves on the barrel. The fluid ports use a PT tapered thread type, and the unit features adjustable air cushions at both ends to manage impact deceleration.
Airtac SAI125 Standard Air Cylinder SAI125AX55S Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125AX55S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 55 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 SAI125 Standard Air Cylinder SAI125AX55S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×55 | 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 SAI125 Standard Air Cylinder SAI125AX55S Is Used
Heavy-Duty Stamping
Provides the immense 6136 N push force required to form and stamp thick-gauge metal components in automated fabrication lines.
Pallet Clamping
Secures heavy industrial pallets or large molds in place during machining or transfer operations where short, high-force strokes are essential.
Injection Mold Ejection
Delivers reliable ejection force for large molded parts, utilizing the 55 mm stroke to clear the mold cavity quickly and efficiently.
Is the Airtac SAI125 Standard Air Cylinder SAI125AX55S the Right Cylinder?
This 125 mm bore size is the optimal choice when a 100 mm bore (providing 3927 N at 0.5 MPa) cannot generate enough thrust, but you want to avoid stepping up to the larger 160 mm class. For this non-standard 55 mm stroke, ensure your mounting setup strictly controls side-load to prevent rod-bearing wear. Because this is a double-acting cylinder, it relies on live air pressure to move and hold the load. If your application requires true fail-safe position holding or drop prevention upon pressure loss, integrate an external pilot-operated check valve or specify the SAIL (air-released lock) variant instead. As a dimensionally interchangeable ISO 15552 profile cylinder, it serves as a drop-in replacement for other ISO 15552 cylinders, matching the exact 125 mm bore, 55 mm stroke, PT port, and standard mounting accessory footprint. Pair it with a -S magnet configuration for CMSE/DMSE sensor feedback.
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 SAI125 Standard Air Cylinder SAI125AX55S FAQ
At a 0.5 MPa operating pressure, this 125 mm bore cylinder exerts a push force of 6136 N and a pull force of 5734 N. The theoretical maximum force at 1.0 MPa is 1251 kgf.
No, the standard SAI cylinder does not hold its position or load when air pressure is lost. The adjustable air cushion only decelerates the piston at stroke end. For fail-safe load holding, you should use the SAIL (with air-released lock) variant or an external rod lock.
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 SAI Cylinders
Request a Quote for Airtac SAI125 Standard Air Cylinder SAI125AX55S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.