Airtac SAIJ125 Adjustable Cylinder SAIJ125X55-10
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X55-10 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 SAIJ125 Adjustable Cylinder SAIJ125X55-10
The AirTAC SAIJ125X55-10 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a 45 to 55 mm usable travel window, allowing you to dial back the 55 mm nominal stroke by up to 10 mm without adding external stops. In the 125 mm bore class, it delivers 6136 N of push force and 5734 N of pull force at 0.5 MPa.
This adjustable model uses a PT tapered port and a 32 mm carbon steel rod with an M27x2 thread. The extruded aluminum barrel includes sensor grooves on both sides, and the mounting set covers Basic, FA, LB, TC, FTC, TCM1, and TCM2. The rear screw acts as a travel stop for end-position tuning, not a load-holding lock.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X55-10 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X55-10 |
|---|---|
| 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 SAIJ125 Adjustable Cylinder SAIJ125X55-10
| 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 SAIJ125 Adjustable Cylinder SAIJ125X55-10 Is Used
Variable End Stops
Dial in the exact 45 to 55 mm retract position during machine setup to accommodate varying material thicknesses without swapping hardware.
Product Changeover
Quickly adjust the stroke window on packaging lines when switching between different package sizes, minimizing downtime.
Machine Setup Tuning
Fine-tune the end-of-stroke position during initial commissioning to perfect timing and avoid mechanical crashes.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X55-10 the Right Cylinder?
Choose this 125 mm bore size when your application requires higher force than the 100 mm option (which provides 3927 N push at 0.5 MPa). You would step down to the 100 mm bore if 6136 N is excessive and a smaller footprint is needed. An adjustable stroke is selected over a fixed SAI cylinder when you need to fine-tune the retract end position during commissioning or product changeover.
For applications requiring the cylinder to hold its position without live air pressure, note that the rear adjuster and air cushions do not function as a lock. In those cases, an external rod lock or a SAIL pneumatic locking cylinder is required. When replacing an ISO 15552 cylinder, match the 125 mm bore, 55 mm stroke, 10 mm adjustment, PT port, and your required mounting style.
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 SAIJ125 Adjustable Cylinder SAIJ125X55-10 FAQ
At 0.5 MPa, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. It can reach a maximum push force of 11045 N at 0.9 MPa.
The rear adjuster screw lets you shorten the 55 mm nominal stroke by up to 10 mm, creating a 45 to 55 mm usable travel window. It acts as a mechanical stop for position tuning, not a load lock.
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Standard models usually ship in 3-4 days.
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