Airtac SAIJ125 Adjustable Cylinder SAIJ125AX240-10S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX240-10S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 240mm 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
- Stroke240 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX240-10S
The AirTAC SAIJ125X240-10-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to dial back the travel by up to 10 mm. This yields a precise 230-240 mm usable stroke window for fine-tuning end positions at commissioning without swapping out the physical unit. Operating at 0.5 MPa, it delivers 8590 N of push force and 5734 N of pull force, making it suited for heavy-duty positioning tasks.
This SKU ships with a SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance and features PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides, and the integrated magnet (-S) supports AirTAC CMSE reed and DMSE solid-state switches for exact position feedback. Speeds are capped at 30-500 mm/s for this bore size, and the adjustable stopper acts purely as a travel limit, not a mechanical lock.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX240-10S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX240-10S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 240 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 SAIJ125AX240-10S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×240 | 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 SAIJ125AX240-10S Is Used
Press Fit Tuning
Dial in the exact 230-240 mm insertion depth for heavy press-fit assemblies, ensuring precise end positions without machining custom spacers.
Product Changeover
Quickly adjust the retract stop during production line changeovers to accommodate minor length differences in new workpieces.
Heavy Material Clamping
Leverage 8590 N of push force at 0.5 MPa to secure large components during machining, using the rear screw to set the exact clamp position.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX240-10S the Right Cylinder?
Choose this 125 mm bore when an application demands high thrust forces between 6136 N and 8590 N at 0.5 MPa, stepping up from a 100 mm bore that provides 5497 N push force. The 10 mm adjustment range is ideal for machines requiring micro-adjustments to the retract end during product changeovers, avoiding the need to bolt on external stops. For load-holding without continuous air pressure, note that the rear adjuster only halts travel; you would need to specify a SAIL pneumatic lock or a BSAI clamp-lock cylinder instead.
When replacing an ISO 15552 cylinder, match the 125 mm bore, 240 mm stroke, 10 mm adjustment, PT G1/2 port, and the -S magnet requirement. Standard mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2. Because the 240 mm stroke is relatively short for this large bore, side-load risks are minimal, but an external guide is still recommended for heavy radial loads.
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 SAIJ125AX240-10S FAQ
The rear adjuster screw acts as a mechanical stop that shortens the effective stroke by up to 10 mm. This provides a usable travel window of 230-240 mm, allowing you to fine-tune the retract end position without adding external spacers.
At an operating pressure of 0.5 MPa, the SAIJ125X240-10-S generates 8590 N of push force and 5734 N of pull force. At 0.7 MPa, the push force increases to 11045 N.
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