Airtac SAIJ125 Adjustable Cylinder SAIJ125X950-30
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X950-30 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 950mm 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
- Stroke950 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X950-30
The AirTAC SAIJ125X950-30 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a 920-950 mm usable travel window, allowing you to dial back the 950 mm nominal stroke by up to 30 mm during commissioning. Delivering 6136 N push force at 0.5 MPa, it handles heavy-duty positioning with precision.
This bore uses a G1/2 port and a 32 mm carbon steel rod with an M27x2 thread, offering substantial rigidity for high loads. The extruded aluminum barrel includes sensor grooves on both sides for CMSE reed or DMSE electronic switches, though this specific SKU is configured without a magnet. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X950-30 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X950-30 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 950 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 SAIJ125X950-30
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×950 | 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 SAIJ125X950-30 Is Used
Press Tooling Setup
Fine-tune the 920-950 mm travel window during press changeovers to accommodate different material thicknesses without repositioning the cylinder.
Pallet Positioning
Adjust the retract stopper on the fly to alter where large pallets halt on a 125 mm bore conveyor line, ensuring precise alignment.
Heavy-Duty Indexing
Leverage the 6136 N pull force to index heavy assemblies, dialing back the end position by up to 30 mm to perfect the machine timing.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X950-30 the Right Cylinder?
Choose this 125 mm bore when a 100 mm bore (providing 3927 N at 0.5 MPa) lacks the necessary push force, but stepping up to a 160 mm bore (10053 N) would be excessive. The adjustable stroke is ideal for product changeovers, letting you fine-tune the retract end position without swapping the cylinder or adding external stops. For a fixed travel length, the standard SAI series is sufficient.
Because the 950 mm stroke is long, the unsupported rod is prone to bending under side loads; always guide the load externally to prevent rod damage. The rear adjuster acts only as a travel stop and does not hold the load without live air—use SAIL or BSAI cylinders if load-holding is required. To match this ISO 15552 footprint, specify the 125 mm bore, 950 mm stroke, 30 mm adjustment, PT tapered port, and standard carbon steel rod.
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 SAIJ125X950-30 FAQ
The external rear adjuster screw acts as a mechanical stop that lets you shorten the 950 mm nominal stroke by up to 30 mm, providing a usable travel window of 920-950 mm. It sets the retract end position but does not lock the load without live air pressure.
At a 0.5 MPa operating pressure, this 125 mm bore double-acting cylinder generates 6136 N of push force and 5734 N of pull force. It can deliver up to 1251 kgf at its maximum 1.0 MPa pressure rating.
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