Airtac SAIJ40 Adjustable Cylinder SAIJ40BX220-75S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX220-75S 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 SAIJ40BX220-75S
The AirTAC SAIJ40X220-75-S is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a 145 to 220 mm usable travel window, allowing you to dial back the nominal 220 mm stroke by up to 75 mm during commissioning. Equipped with a SUS304 stainless steel rod and a PT tapered port, it delivers 628 N of push force at 0.5 MPa and operates at speeds of 30-800 mm/s.
This adjustable model uses an external stopper screw at the rear to fine-tune the retract end position without adding external stops or swapping cylinders. The adjuster acts solely as a travel stop and works alongside the variable air cushions at both ends; it does not lock the load. For position holding without live air pressure, consider the SAIL or BSAI series instead.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX220-75S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX220-75S |
|---|---|
| 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 SAIJ40BX220-75S
| 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 SAIJ40BX220-75S Is Used
Variable End-Stop Tuning
Dial in the exact retract position within the 145-220 mm window during machine commissioning to accommodate varying product lengths without mechanical modifications.
Product Changeover
Rapidly adjust the stroke length up to 75 mm on packaging or assembly lines when switching between different sized components, minimizing downtime.
Sensor-Ready Positioning
Leverage the integrated magnet with DMSE solid-state sensors to confirm end-of-stroke positions accurately while fine-tuning the rear stopper for precise operations.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX220-75S the Right Cylinder?
Choose this SAIJ40X220-75-S when your machine setup requires a wide 75 mm variable end-stop window for product changeovers. It is dimensionally interchangeable per ISO 15552 mounting interfaces and includes a magnet for CMSE reed or DMSE electronic sensors. The 16 mm rod and M12x1.25 thread handle moderate side loads, but because the stroke is 220 mm, ensure proper external guiding to prevent rod binding.
If your application needs less force, step down to a bore 32 unit (402 N push at 0.5 MPa); if you require higher thrust, step up to a bore 50 cylinder (982 N push). The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR. For fixed travel without the adjustment screw, use the standard SAI series.
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 SAIJ40BX220-75S FAQ
At a 0.5 MPa operating pressure, this 40 mm bore cylinder provides 628 N of push force and 528 N of pull force. At 0.7 MPa, the push force increases to 879 N.
The rear adjuster screw acts as a mechanical stop, allowing you to shorten the effective stroke from 220 mm down to 145 mm. It sets the travel end but does not lock the load without live air pressure.
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