Airtac SAIJ40 Adjustable Cylinder SAIJ40AX95-20S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40AX95-20S 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 SAIJ40AX95-20S
The AirTAC SAIJ40X95-20-S is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster that allows you to fine-tune the effective travel within a 75-95 mm window. Delivering 628 N of push force at 0.5 MPa, this 40 mm bore unit uses a SUS420J2 stainless steel rod for improved corrosion resistance compared to standard carbon steel. It includes a magnetic piston for precise position detection via CMSE reed or DMSE electronic sensors.
The integrated rear stopper lets you dial in the exact end-of-stroke position during commissioning without adding external physical stops. Fluid ports are PT tapered thread (G1/4), and the extruded aluminum barrel includes sensor grooves on both sides for flexible switch mounting. The variable air cushions at both ends work alongside the adjuster to decelerate the load smoothly.
Airtac SAIJ40 Adjustable Cylinder SAIJ40AX95-20S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40AX95-20S |
|---|---|
| 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 SAIJ40AX95-20S
| 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 SAIJ40AX95-20S Is Used
Machine Changeover
Quickly dial in the 75-95 mm travel window during product size transitions without swapping out the entire cylinder or repositioning hard stops.
Sensor-Driven Positioning
Leverages the -S magnet with DMSE electronic or CMSE reed switches to confirm end-of-stroke positions while the rear adjuster fine-tunes the physical travel limit.
Clamping Force Calibration
Uses the 628 N push force at 0.5 MPa for precise clamping, allowing the 20 mm rear stopper to prevent over-travel and damage to delicate workpieces.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40AX95-20S the Right Cylinder?
Choose this 40 mm bore adjustable-stroke cylinder when your application requires exact end-position tuning at setup or during product changeovers, rather than the fixed travel of a standard SAI model. If your process needs less force, stepping down to a 32 mm bore yields 402 N of push at 0.5 MPa; if you require more thrust, moving up to a 50 mm bore provides 982 N. Remember that the rear adjuster acts only as a travel stop and does not hold the load without live air—use an SAIL or BSAI cylinder for true lock-holding requirements.
For a seamless ISO 15552 replacement, match the 40 mm bore, 95 mm stroke, 20 mm adjustment range, PT port thread, and the -S magnet requirement. The 16 mm rod diameter and M12x1.25 rod thread handle moderate side loads well, but for any stroke over 300 mm, an external guide is recommended to prevent rod bending.
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 SAIJ40AX95-20S FAQ
At a 0.5 MPa operating pressure, this 40 mm bore cylinder provides 628 N of push force and 528 N of pull force. It can reach a maximum push force of 1130 N at 0.9 MPa.
The rear adjuster screw acts as a mechanical stop that lets you shorten the 95 mm nominal stroke by up to 20 mm, creating a usable travel window of 75-95 mm. This allows for precise end-position tuning during commissioning without replacing the cylinder.
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