Airtac SAIJ40 Adjustable Cylinder SAIJ40X225-50S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40X225-50S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 225mm 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
- Stroke225 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 SAIJ40X225-50S
The AirTAC SAIJ40X225-50-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers 628 Newtons of push force at 0.5 MPa and features a built-in magnet for position sensing. By turning the external stopper screw, you can trim the effective travel back by up to 50 mm, creating a precise 175-225 mm usable stroke window without needing external stops.
This bore size utilizes a G1/4 port and a 16 mm carbon steel rod with an M12x1.25 thread, providing a robust interface for moderate loads. The extruded aluminum barrel includes sensor grooves on both sides, allowing you to easily mount CMSE reed or DMSE electronic switches along the entire travel path. It is dimensionally interchangeable per ISO 15552 standards while retaining AirTAC's specific SAIJ mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2).
Airtac SAIJ40 Adjustable Cylinder SAIJ40X225-50S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40X225-50S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 225 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 SAIJ40X225-50S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×225 | 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 SAIJ40X225-50S Is Used
Product Changeover
Quickly fine-tune the 175-225 mm end position during format size changes on a packaging line without adding physical shims.
End-Stop Calibration
Dial in the exact clamping depth during machine commissioning using the rear screw, avoiding the cost of machining custom spacers.
Variable Positioning
Provide an adjustable mechanical stop for assembly presses that need to accommodate slight variations in incoming part heights.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40X225-50S the Right Cylinder?
Choose this 40 mm bore when an application demands more power than a 32 mm cylinder (402N push at 0.5 MPa) but lacks the space for a 50 mm unit (982N). The 50 mm adjustment range is ideal for production lines running mixed product sizes, letting operators dial in the exact end position during changeover rather than swapping hardware. The PT tapered port threads ensure a tight, leak-free pneumatic connection.
Because the nominal stroke is 225 mm, the 16 mm rod remains well-supported, but always verify side-load conditions against your external guide rails. Remember that the rear adjuster acts strictly as a travel stop and the air cushion only handles deceleration; neither will hold a load without live air pressure. For dead-load holding, select an AirTAC SAIL or BSAI cylinder instead.
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 SAIJ40X225-50S FAQ
The rear stopper screw allows you to shorten the nominal 225 mm stroke by up to 50 mm. This creates a usable travel window of 175-225 mm, which can be fine-tuned during commissioning or product changeover without replacing the cylinder.
At 0.5 MPa operating pressure, it provides 628 Newtons of push force and 528 Newtons of pull force. If you increase the pressure to 0.7 MPa, the push force rises to 879 Newtons.
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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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