Airtac SAIJ50 Adjustable Cylinder SAIJ50AX70-40
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50AX70-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 70mm 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.
- BoreØ50 mm
- Stroke70 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- 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 SAIJ50 Adjustable Cylinder SAIJ50AX70-40
The AirTAC SAIJ50X70-40 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a nominal 70 mm stroke that can be dialed back by up to 40 mm, creating a precise 30-70 mm usable travel window for commissioning without external stops. Delivering 982 N of push force at 0.5 MPa, it fits perfectly into mid-range pneumatic setups.
This variant uses a SUS420J2 stainless steel rod (code A) for enhanced durability against side loads and features PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides, allowing for direct mounting of AirTAC CMSE reed and DMSE electronic switches. It supports the standard SAIJ mounting set, including Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ50 Adjustable Cylinder SAIJ50AX70-40 Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50AX70-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 70 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M16×1.5 |
| 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 (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ50 Adjustable Cylinder SAIJ50AX70-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×70 | 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 SAIJ50 Adjustable Cylinder SAIJ50AX70-40 Is Used
Product Changeovers
Dial in the exact end position from 30 to 70 mm during machine setup, accommodating different product sizes on the same line without physically swapping cylinders.
End-Position Tuning
Fine-tune the retract stop during commissioning to perfect the seating of parts, eliminating the need to bolt on external mechanical stops.
Variable Diverter Stops
Adjust the travel window on the fly for conveyor sorting gates that need to handle varying package dimensions dynamically.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX70-40 the Right Cylinder?
Select this 50 mm bore when an application requires 982 N of push force at 0.5 MPa, or 1374 N at 0.7 MPa, making it a solid step up from the 40 mm bore which provides 628 N. The 40 mm adjustment range is highly valuable here, effectively allowing you to trim more than half of the nominal stroke. This makes it ideal for product changeovers where the exact end-of-stroke position varies significantly, replacing the need to swap out a fixed-stroke SAI cylinder.
Remember that the rear adjuster functions only as a travel stop and does not hold the load without live air pressure; for true load-holding, consider the SAIL or BSAI series. To match this cylinder exactly for an ISO 15552 replacement, specify the 50 mm bore, 70 mm stroke, 40 mm adjustment, PT G1/4 port, SUS420J2 rod material, and no magnet.
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 SAIJ50 Adjustable Cylinder SAIJ50AX70-40 FAQ
The rear adjuster screw acts as a mechanical stop that lets you shorten the effective travel from the nominal 70 mm down to as little as 30 mm, providing a 40 mm adjustment window. It sets the end position but does not lock or hold the load without continuous air pressure.
At 0.5 MPa, it provides 982 N of push force and 825 N of pull force. If you increase the operating pressure to 0.7 MPa, the push force rises to 1374 N.
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