Airtac SAIJ40 Adjustable Cylinder SAIJ40AX950-10
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40AX950-10 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 950mm 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
- Stroke950 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40AX950-10
The AirTAC SAIJ40X950-10 is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers 879N of push force at 0.7MPa and features a 940-950mm usable travel window, letting you trim the retract end-position by up to 10mm during commissioning. The extruded aluminum barrel includes sensor grooves on both sides, and the SUS420J2 stainless steel rod (code A) provides enhanced corrosion resistance.
This model uses a PT tapered port thread and omits the FB, CA, CB, and CR mounting options found on some standard cylinders, supporting Basic, FA, LB, TC, FTC, TCM1, and TCM2 interfaces. Because the stroke reaches 950mm, the 16mm rod and M12x1.25 thread require external guiding to prevent excessive side-loading on the piston. The rear stopper acts purely as a travel limit, not a load-holding lock.
Airtac SAIJ40 Adjustable Cylinder SAIJ40AX950-10 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40AX950-10 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 950 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 SAIJ40AX950-10
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | 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 SAIJ40 Adjustable Cylinder SAIJ40AX950-10 Is Used
Long-Stroke Machine Setup
Dial in the exact 940-950mm retract position during initial commissioning without swapping out the entire cylinder or re-machining hard stops.
Product Size Changeover
Quickly trim the end-of-stroke by up to 10mm on packaging lines when transitioning between slightly different product lengths.
Extended Reach Actuators
Utilize the 950mm travel for material transfer tasks while relying on the fine adjustment screw to absorb mechanical tolerance variations.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40AX950-10 the Right Cylinder?
Choose this 40mm bore if you need 879N push force at 0.7MPa and want to fine-tune a long 950mm retract without adding external stops. If your application requires less force, stepping down to a 32mm bore yields 563N at 0.7MPa; stepping up to a 50mm bore provides 1374N. The adjustable 10mm window is ideal for product changeovers where exact end-positioning varies slightly.
For any stroke of 300mm or more, an external guide is strongly recommended to support the load and prevent side-load wear. Remember that the rear adjuster and air cushions only decelerate the travel end; they do not hold the load without live air. For dead-pilot or locked positioning, consider an AirTAC SAIL or BSAI cylinder. To match this ISO 15552 replacement exactly, specify: 40mm bore, 950mm stroke, 10mm adjustment, PT port, SUS420J2 rod, and no magnet.
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 SAIJ40AX950-10 FAQ
At 0.7MPa operating pressure, this 40mm bore cylinder provides 879N of push force and 740N of pull force. It can reach a maximum push force of 1130N at 0.9MPa.
The rear adjusting screw acts as a mechanical stopper, allowing you to shorten the effective retract stroke anywhere within a 940-950mm window. It is a travel limit, not a lock, meaning the cylinder still requires live air to hold its position.
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