Airtac SAIJ40 Adjustable Cylinder SAIJ40AX950-100S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40AX950-100S 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 SAIJ40AX950-100S
The AirTAC SAIJ40X950-100-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It features a 40mm bore and a 950mm nominal stroke, yielding an adjustable usable travel window of 850-950mm. This specific SKU includes a SUS420J2 stainless steel rod (code A) for improved corrosion resistance and uses PT tapered port threads. The integrated magnet (-S) enables position sensing with AirTAC CMSE reed and DMSE electronic sensors.
Delivering 628N of push force and 528N of pull force at 0.5MPa, it operates at speeds between 30-800mm/s. The external adjusting screw acts purely as a mechanical stop to fine-tune the retract end position during commissioning without swapping the cylinder. The adjuster and the variable air cushions at both ends decelerate the travel but do not hold the load without live air pressure. For load-holding without live pressure, consider the SAIL or BSAI series.
Airtac SAIJ40 Adjustable Cylinder SAIJ40AX950-100S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40AX950-100S |
|---|---|
| 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 SAIJ40AX950-100S
| 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 SAIJ40AX950-100S Is Used
Product Changeover
Dial in the exact retract position within the 850-950mm window during line changeovers without adding external mechanical stops.
Machine Setup
Fine-tune the end-of-stroke position during commissioning to dial in precise timing and prevent mechanical interference.
Variable End Stops
Adjust the travel limit on the fly for processes handling varying package sizes or material lengths on a single conveyor line.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40AX950-100S the Right Cylinder?
Select this 40mm bore adjustable-stroke cylinder when your machine setup requires variable end-stops or precise product changeover tuning. It provides 628N push force at 0.5MPa; if your application requires less force, a 32mm bore offers 402N, while stepping up to a 50mm bore yields 982N. Because this is a 950mm stroke, the 16mm diameter rod and M12x1.25 rod thread will experience leverage forces on long unsupported loads, so an external guide is recommended to prevent side-load damage.
To match this ISO 15552 dimensionally interchangeable cylinder, specify: 40mm bore, 950mm stroke, 100mm adjustment, PT G1/4 ports, Basic/FA/LB/TC/FTC/TCM1/TCM2 mountings, and a magnet for CMSE/DMSE sensors. The rear adjuster is a travel stop, not a lock, so external rod locks or pilot-operated check valves are needed if the load must be held without continuous air supply.
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 SAIJ40AX950-100S FAQ
At 0.5MPa, this 40mm bore cylinder provides 628N of push force and 528N of pull force. At 0.7MPa, the push force increases to 879N.
The rear adjusting screw acts as an external stopper, allowing you to shorten the effective stroke from 950mm down to 850mm. It sets the travel end position but does not lock or hold the load without live air pressure.
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