Airtac SAIJ40 Adjustable Cylinder SAIJ40BX220-40S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX220-40S 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 SAIJ40BX220-40S
The AirTAC SAIJ40X220-40-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that creates a usable travel window of 180 to 220 mm. Equipped with a 16mm SUS304 stainless steel rod and a PT G1/4 port, it delivers 879N of push force at 0.7 MPa. The extruded aluminum barrel includes sensor grooves on both sides for flexible mounting of CMSE reed or DMSE electronic switches.
This adjustable design allows you to fine-tune the retract end-position at commissioning without swapping the cylinder or adding external stops. The rear adjuster functions strictly as a travel stop and relies on the variable air cushion for end-of-stroke deceleration; it does not hold the load without live air pressure.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX220-40S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX220-40S |
|---|---|
| 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 SAIJ40BX220-40S
| 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 SAIJ40BX220-40S Is Used
Machine Setup Tuning
Dial in the exact 180-220mm retract position during initial commissioning without machining new mounting plates or swapping cylinders.
Product Size Changeovers
Quickly adapt the stroke end-stop on packaging lines when handling different carton lengths, using the 40mm adjustment range to vary travel.
Variable End-Stop Positioning
Set precise retract limits for assembly presses that require slight positional tweaks between batches without adding external mechanical stops.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX220-40S the Right Cylinder?
Choose this 40mm bore when an application requires approximately 879N of thrust at 0.7 MPa, stepping up from a 32mm bore (563N) for heavier pushing tasks, or down from a 50mm bore (1374N) to save space. The 40mm adjustment range is ideal for product changeovers on a line, letting you dial in the exact end-stop without mechanical modifications. For load-holding without continuous air pressure, select a SAIL (air-released lock) or BSAI (clamp-lock) cylinder instead of relying on this adjuster. To replace an ISO 15552 cylinder, match the 40mm bore, 220mm stroke, 40mm adjustment, PT G1/4 port, and the -S magnet. Because the stroke is 220mm, ensure external guiding for long unsupported loads to prevent rod side-load wear.
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 SAIJ40BX220-40S FAQ
At 0.7 MPa operating pressure, this 40mm bore cylinder provides 879N of push force and 528N of pull force. It can reach a maximum push force of 1130N at 0.9 MPa.
The rear adjuster screw acts as a mechanical stop that lets you shorten the effective travel from the nominal 220mm down to 180mm. This creates a 180-220mm usable window for fine-tuning end positions without replacing the cylinder.
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