Airtac SAIJ40 Adjustable Cylinder SAIJ40AX900-75
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40AX900-75 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 900mm stroke, G1/4 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ40 mm
- Stroke900 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40AX900-75
The AirTAC SAIJ40X900-75 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a 825-900 mm usable travel window, allowing you to dial back the 900 mm nominal stroke by up to 75 mm during commissioning. Delivering 628 N of push force and 528 N of pull force at 0.5 MPa, it bridges the gap between compact 32 mm bores and heavier 50 mm units.
This long-stroke unit is equipped with a SUS420J2 stainless steel rod (option A) for enhanced corrosion resistance and features PT tapered G1/4 ports. The extruded aluminum barrel includes sensor grooves on both sides for flexible mounting of CMSE or DMSE switches. Since the rear screw acts only as a travel stop, it cannot hold loads without live air pressure.
Airtac SAIJ40 Adjustable Cylinder SAIJ40AX900-75 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40AX900-75 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 900 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M12×1.25 |
| 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 (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ40 Adjustable Cylinder SAIJ40AX900-75
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×900 | 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 SAIJ40 Adjustable Cylinder SAIJ40AX900-75 Is Used
Variable End-Stop Machining
Dial in the exact 825 to 900 mm clamping depth on a long-bed machining center without physically relocating the cylinder mounts.
Product Size Changeover
Quickly adapt a long-trroke pusher on a packaging line to handle different box lengths by adjusting the rear stopper screw.
Commissioning Fine-Tuning
Trim the effective travel during machine setup to perfectly time a long transfer arm, avoiding the need for custom spacer collars.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40AX900-75 the Right Cylinder?
Choose this 40 mm bore when a 32 mm cylinder lacks thrust (providing just 402 N push at 0.5 MPa) but a 50 mm bore is oversized. The 75 mm adjustment range is perfect for product changeovers, letting you fine-tune the end position without swapping the cylinder or adding external stops. For any load-holding requirements without continuous air pressure, this standard adjuster will not suffice; consider an external pilot-operated check valve or the AirTAC SAIL lock series.
To replace an ISO 15552 cylinder, match the 40 mm bore, 900 mm stroke, 75 mm adjustment, PT G1/4 port, and mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2). Because the stroke is 900 mm, the 16 mm rod and M12x1.25 thread will not prevent excessive deflection; an external guide rail is strongly recommended to manage side 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 SAIJ40 Adjustable Cylinder SAIJ40AX900-75 FAQ
At a 0.5 MPa operating pressure, this 40 mm bore cylinder generates 628 N of push force and 528 N of pull force. At the maximum pressure of 1.0 MPa, it can deliver up to 128 kgf.
The rear adjuster screw allows you to shorten the 900 mm nominal stroke by up to 75 mm, creating an adjustable travel window of 825 to 900 mm. This stopper only sets the end position and does not lock the load without live air pressure.
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