Airtac SAIJ40 Adjustable Cylinder SAIJ40BX550-20
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX550-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 550mm 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
- Stroke550 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX550-20
The AirTAC SAIJ40X550-20 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the travel window from 530 to 550 mm without adding external stops. Delivering 628 N of push force at 0.5 MPa, it is tailored for applications requiring precise end-position calibration during commissioning. This configuration utilizes a SUS304 stainless steel rod for superior corrosion resistance and features a PT tapered port thread.
Because the nominal 550 mm stroke exceeds typical compact lengths, the 16 mm rod and M12x1.25 thread provide robust support, though an external guide is recommended for the extended travel. The rear adjuster acts purely as a mechanical stop to set the retract position; it does not lock the load without live air pressure. For load-holding requirements, consider the SAIL or BSAI series instead.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX550-20 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX550-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 550 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 SAIJ40BX550-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×550 | 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 SAIJ40BX550-20 Is Used
Machine Changeover
Dial in the 530-550 mm retract stop during product size transitions to perfectly align packaging or processing tools without swapping cylinders.
End-Position Calibration
Fine-tune the final end-of-stroke position at commissioning to compensate for mechanical tolerance stack-ups across a long 550 mm travel.
Variable End Stops
Adjust the rear stopper to alter the stroke length on the fly for diverter or positioning mechanisms on a dynamic production line.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX550-20 the Right Cylinder?
Select this 40 mm bore adjustable-stroke model when your machine setup requires variable end-stops or product-size changeovers on a 550 mm travel line. It provides 628 N push and 528 N pull at 0.5 MPa. If your application demands higher force, stepping up to the 50 mm bore yields 982 N push at 0.5 MPa. If less force is needed, the 32 mm bore provides 402 N.
This cylinder is dimensionally interchangeable per ISO 15552 standards. To match this exact configuration, specify the 40 mm bore, 550 mm stroke, 20 mm adjustment range, PT port thread, SUS304 (B) rod material, and no magnet. For any stroke of 300 mm or more, ensure you use an external guide to prevent excessive side-load wear on the unsupported rod.
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 SAIJ40BX550-20 FAQ
At 0.5 MPa operating pressure, this 40 mm bore cylinder provides 628 N of push force and 528 N of pull force. At the maximum 1.0 MPa pressure, it can deliver up to 1130 N of push force.
The rear adjuster screw allows you to shorten the effective travel by up to 20 mm, creating a usable stroke window of 530 to 550 mm. This mechanical stop sets the retract end position but does not hold the load without live air pressure.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Request a Quote for Airtac SAIJ40 Adjustable Cylinder SAIJ40BX550-20
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.