Airtac SAIJ40 Adjustable Cylinder SAIJ40AX155-40
The AirTAC SAIJ40 Adjustable Cylinder SAIJ40AX155-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 155mm stroke, G1/4 air ports and adjustable end cushioning. Its standardized mounting interface makes it interchangeable with other ISO 15552 cylinders at the mounting interface.
- BoreØ40 mm
- Stroke155 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 SAIJ40AX155-40
The AirTAC SAIJ40X155-40 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to trim the effective travel. With a nominal 155 mm stroke and a 40 mm adjustment range, it provides a usable window of 115 to 155 mm. This enables precise end-position tuning at commissioning without swapping the cylinder or adding external stops.
This model features a SUS420J2 stainless steel rod (option A) for improved corrosion resistance and uses PT tapered port threads (G1/4). The extruded aluminum barrel includes sensor grooves on both sides, though this specific SKU is configured without a magnet. The rear adjuster acts purely as a mechanical stop to set the retract position; it is not a lock and will not hold the load without live air pressure.
Airtac SAIJ40 Adjustable Cylinder SAIJ40AX155-40 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40AX155-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 155 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 | 528 N | 528 N |
| 0.7 MPa | 739 N | — |
| Max (@1.0 MPa) | 108 kgf | |
Double-rod model: the rod passes through the rear cover, so both piston faces lose rod area and push is shown at the annular-area value. Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ40 Adjustable Cylinder SAIJ40AX155-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×155 | 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 SAIJ40AX155-40 Is Used
Machine Changeover
Dial in the exact retract distance from 115 to 155 mm during product size transitions without disassembling the pneumatic line or adding external spacers.
End-Stop Tuning
Fine-tune the final end-of-stroke position during machine commissioning to perfect the mating alignment of delicate tooling.
Variable Positioning
Provide a flexible travel window on automated assembly lines where multiple parts of slightly varying heights are processed at the same station.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40AX155-40 the Right Cylinder?
If you need less force, the 32 mm bore offers 402 N; if you need more, the 50 mm bore provides 982 N. The adjustable stroke is ideal for machine setups that undergo product changeovers, allowing you to dial in the travel by up to 40 mm rather than machining custom spacers. For load-holding without continuous air pressure, this cylinder is insufficient as the adjuster only decelerates the stroke; you should look to the SAIL or BSAI series instead. To replace an ISO 15552 cylinder, match the 40 mm bore, 155 mm stroke, PT port, and your required mounting set (Basic, FA, LB, TC, FTC, TCM1, 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 SAIJ40AX155-40 FAQ
It features a rear adjusting screw that acts as a mechanical stopper, allowing you to shorten the nominal 155 mm stroke by up to 40 mm. This creates a usable travel window of 115 to 155 mm, which can be fine-tuned during commissioning without replacing the cylinder.
At 0.7 MPa, the push force increases to 879 N.
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1-Year Warranty
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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Most inquiries answered within 7-8 hours.
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