Airtac SAIJ40 Adjustable Cylinder SAIJ40AX95-20
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40AX95-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 95mm 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
- Stroke95 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40AX95-20
The AirTAC SAIJ40X95-20 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that creates a 75-95 mm usable travel window from its 95 mm nominal length. Delivering 628 N of push force at 0.5 MPa, it uses a G1/4 port and a 16 mm rod to handle standard actuation duties.
This variant incorporates a SUS420J2 stainless steel rod for improved corrosion resistance and utilizes PT tapered port threads for a robust pneumatic seal. The extruded aluminum barrel includes sensor grooves on both sides, allowing you to add CMSE reed or DMSE electronic switches later without altering the mounting footprint.
Airtac SAIJ40 Adjustable Cylinder SAIJ40AX95-20 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40AX95-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 95 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 SAIJ40AX95-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×95 | 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 SAIJ40AX95-20 Is Used
Changeover Dial-In
Dial in the exact retract distance within the 75-95 mm window when switching product sizes on a packaging line, avoiding physical cylinder swaps.
End-Stop Calibration
Fine-tune the end-of-stroke position during machine commissioning to perfect part seating or clamping pressure without adding external mechanical stops.
Sensor Positioning
Utilize the dual sensor grooves on the extruded barrel to mount CMSE or DMSE switches exactly where needed within the adjusted travel range.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40AX95-20 the Right Cylinder?
Choose this 40 mm bore when a 32 mm bore (offering 402 N push at 0.5 MPa) is too weak, but a 50 mm bore (982 N) is unnecessarily large. The 20 mm rear adjustment screw is selected when you need to fine-tune the retract end position during commissioning or product changeover without installing external stops. For fixed travel without a rear adjuster, the standard SAI cylinder is the alternative.
Because the stroke is under 300 mm, side-load stress is minimal, though long unsupported loads still require an external guide. Remember that the rear adjuster acts only as a travel stop and does not hold the load without live air; for true position holding without pressure, consider an external pilot-operated check valve or the SAIL lock cylinder. This unit uses the reduced SAIJ mounting set: Basic, FA, LB, TC, FTC, TCM1, and TCM2.
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 SAIJ40AX95-20 FAQ
It features a rear adjusting screw that lets you shorten the effective stroke by up to 20 mm. This provides a usable travel window of 75 to 95 mm, allowing you to set the exact retract end-position without changing the cylinder.
At 0.5 MPa operating pressure, this 40 mm bore cylinder provides 628 N of push force and 528 N of pull force. It can deliver up to 1130 N of push force at 0.9 MPa.
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