Airtac SAIJ40 Adjustable Cylinder SAIJ40X950-30S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40X950-30S 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
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40X950-30S
The AirTAC SAIJ40X950-30-S is a double-acting ISO 15552 profile cylinder with a rear stroke adjuster, providing a usable travel window of 920 to 950 mm. Equipped with a carbon steel rod and a -S magnet, it supports AirTAC CMSE reed and DMSE electronic sensors via the dual-side extruded barrel grooves. Delivering 628 N of push force at 0.5 MPa, it is built for precise end-position tuning.
This model features a PT tapered G1/4 port and variable air cushions at both ends to manage deceleration. The rear stopper allows you to fine-tune the stroke during commissioning without swapping the cylinder, while the M12x1.25 rod thread handles moderate side loads. Remember that the adjuster acts only as a travel stop and does not hold the load without live air pressure.
Airtac SAIJ40 Adjustable Cylinder SAIJ40X950-30S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40X950-30S |
|---|---|
| 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 SAIJ40X950-30S
| 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 SAIJ40X950-30S Is Used
Machine Changeover
Dial in the 920-950 mm travel window during product size changes without physically swapping out the actuator.
Variable End Stops
Set precise retract positions on a long conveyor sorting line using the rear adjustment screw.
Commissioning Fine-Tune
Trim up to 30 mm of stroke during initial setup to perfect the tooling reach without external spacers.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40X950-30S the Right Cylinder?
Choose this 40 mm bore when an application requires 628 N push force at 0.5 MPa and exact end-stop dialing. If your process needs less force, the 32 mm bore offers 402 N; for heavier loads, the 50 mm bore provides 982 N. The 30 mm adjustment range is ideal for product changeovers, letting you trim the 950 mm stroke down to 920 mm without adding external stops. For load-holding without live air, consider the SAIL or BSAI series.
When replacing an ISO 15552 cylinder, match the 40 mm bore, 950 mm stroke, 30 mm adjustment, PT port thread, and -S magnet. Because the stroke is 950 mm, an external guide is recommended to prevent rod deflection and premature seal wear. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR options.
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 SAIJ40X950-30S FAQ
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 reach 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 travel window. It only sets the end position and does not lock the load without live air.
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Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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