Airtac SAIJ40 Adjustable Cylinder SAIJ40BX220-75
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX220-75 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 SAIJ40BX220-75
The AirTAC SAIJ40X220-75 is a double-acting, single-rod profile cylinder dimensionally interchangeable per ISO 15552. It features a rear mechanical adjuster that allows you to trim the effective travel, providing a usable stroke window of 145 to 220 mm for this specific configuration. Delivering 879N of push force and 528N of pull force at 0.7 MPa, it bridges the gap between compact 32mm units and high-thrust 50mm bores.
This SKU is configured with a SUS304 stainless steel rod (material code B) for superior corrosion resistance and includes PT tapered port threads. The extruded aluminum barrel incorporates sensor grooves on both sides, allowing you to mount CMSE reed or DMSE electronic solid-state switches without extra brackets. It supports the standard SAIJ mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2) while omitting the FB, CA, CB, and CR options.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX220-75 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX220-75 |
|---|---|
| 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 SAIJ40BX220-75
| 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 SAIJ40BX220-75 Is Used
Machine Changeover
Dial in the 145-220mm travel window during product size changes on a packaging line without replacing the cylinder or adding external stopper blocks.
End-Stop Tuning
Precisely set the retract end-position during commissioning to dial out mechanical tolerance and ensure exact tooling placement.
Variable Diverter
Adjust the stroke on the fly to reposition a conveyor diverter arm or sorting gate for different package lengths.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX220-75 the Right Cylinder?
Select this 40mm bore when your application requires the 628N to 879N force range at 0.5 to 0.7 MPa, stepping up from the 32mm bore (402N push at 0.5 MPa) for heavier payloads, or stepping down from the 50mm bore (982N push at 0.5 MPa) to save space and air consumption. The 75mm adjustment range is ideal for machine changeovers, letting you fine-tune the end position without swapping cylinders or adding external stops. To match this ISO 15552 replacement exactly, specify the 40mm bore, 220mm stroke, 75mm adjustment, PT port thread, and no magnet.
Because the total stroke is 220 mm, you should guide the load externally to prevent excessive side-loading on the M12x1.25 rod thread. Note that the rear adjuster acts as a travel stop and the air cushions provide end-of-stroke deceleration; neither holds the load without live air pressure. For true fail-safe load holding, consider the SAIL pneumatic lock or BSAI clamp-lock series 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 SAIJ40BX220-75 FAQ
The rear adjusting screw acts as a mechanical stopper, allowing you to shorten the nominal 220mm stroke by up to 75mm. This creates a usable travel window of 145 to 220mm, which can be fine-tuned during commissioning without changing the cylinder.
At 0.7 MPa operating pressure, this 40mm bore cylinder provides 879N of push force and 528N of pull force. It operates at speeds of 30-800 mm/s and features variable air cushions at both ends.
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