Airtac SAIJ40 Adjustable Cylinder SAIJ40BX220-30
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX220-30 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 220mm 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
- Stroke220 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX220-30
The AirTAC SAIJ40X220-30 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to dial back the travel by up to 30 mm. This yields a usable stroke window of 190 to 220 mm, enabling precise end-position tuning at commissioning without swapping out the unit. It delivers 628 N of push force at 0.5 MPa and features a SUS304 stainless steel rod for superior corrosion resistance.
Unlike a fixed-stroke SAI, this model lets you set variable end-stops for product changeovers directly at the rear screw. The PT tapered ports ensure a tight, reliable pneumatic connection, and the extruded aluminum barrel includes sensor grooves on both sides for flexible switch mounting.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX220-30 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX220-30 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 220 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 SAIJ40BX220-30
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×220 | 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 SAIJ40BX220-30 Is Used
Machine Changeover
Dial in the 190-220 mm travel window during product size transitions without replacing the cylinder or adding external stops.
End-Position Tuning
Fine-tune the exact retract end-point at commissioning to perfect machine timing and avoid mechanical crashes.
Assembly Line Stops
Provides adjustable physical stops for varying part lengths on a single conveyor line setup.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX220-30 the Right Cylinder?
Choose this adjustable-stroke cylinder when your setup requires exact end-position calibration or frequent product-size changes on a line. If you need less force, stepping down to a bore 32 yields 402 N of push force at 0.5 MPa; stepping up to a bore 50 provides 982 N. Since this is a 220 mm stroke, it remains under the 1200 mm standard maximum for this bore.
The rear adjuster acts purely as a mechanical travel stop to set deceleration and end limits, meaning it will not hold the load without live air pressure. For load-holding requirements without continuous air, consider the SAIL or BSAI series. This unit uses PT tapered ports, omits the FB, CA, CB, and CR mounting styles, and does not include a magnet for sensors.
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 SAIJ40BX220-30 FAQ
At an operating pressure of 0.5 MPa, this 40 mm bore cylinder provides 628 N of push force and 528 N of pull force. At 0.9 MPa, the push force increases to 1130 N.
The rear adjuster allows you to shorten the nominal 220 mm stroke by up to 30 mm, providing an effective travel window of 190 to 220 mm. This stop only sets the end position and does not lock the load without live air pressure.
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