Airtac SAIJ40 Adjustable Cylinder SAIJ40AX950-30
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40AX950-30 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 SAIJ40AX950-30
The AirTAC SAIJ40X950-30 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that creates a 920-950 mm usable travel window. Delivering 879 N of push force at 0.7 MPa, it is engineered for applications requiring exact end-position tuning without swapping hardware. The 950 mm stroke approaches the maximum standard range for this bore, making the 30 mm adjustment highly practical for fine-tuning machine setup.
This unit features an SUS420J2 stainless steel rod for improved corrosion resistance compared to standard carbon steel. It uses a PT tapered port thread and operates at speeds of 30-800 mm/s. The extruded aluminum barrel includes sensor grooves on both sides, ready for CMSE reed or DMSE electronic switches if a magnet is specified later.
Airtac SAIJ40 Adjustable Cylinder SAIJ40AX950-30 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40AX950-30 |
|---|---|
| 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 SAIJ40AX950-30
| 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 SAIJ40AX950-30 Is Used
Long-Stroke Machine Setup
Dial in the 920-950 mm travel window during commissioning to perfectly time a long-axis pusher without machining new hard stops.
Variable End-Position Tuning
Use the 30 mm rear screw to adjust the retract distance on the fly, accommodating minor product length changes on a packaging line.
Corrosive Assembly Lines
Leverage the SUS420J2 stainless steel rod on a 950 mm stroke to push components in environments where standard carbon rods would degrade.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40AX950-30 the Right Cylinder?
Choose this 40 mm bore when 628 N of thrust at 0.5 MPa is sufficient, stepping down from a 63 mm bore that yields 1559 N, or up if you need more power. An adjustable stroke is selected over a fixed SAI cylinder when you need variable end-stops or commissioning fine-tuning without adding external stops. The rear adjuster acts only as a travel stop and does not hold the load without live air; for true load-holding, consider the SAIL or BSAI series.
Because the 950 mm stroke is long, the 16 mm rod and M12x1.25 thread still require an external guide to prevent excessive side-loading and rod deflection. This SAIJ model uses a reduced mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2), omitting FB, CA, CB, and CR brackets. It is dimensionally interchangeable per ISO 15552.
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 SAIJ40AX950-30 FAQ
At 0.7 MPa operating pressure, this 40 mm bore cylinder provides 879 N of push force and 528 N of pull force. It can deliver up to 1130 N of push force at 0.9 MPa.
The rear adjuster screw acts as a mechanical stop, allowing you to shorten the 950 mm nominal stroke by up to 30 mm, creating a 920-950 mm usable travel window. It only sets the end position and does not lock the load without continuous air pressure.
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