Airtac SAIJ40 Adjustable Cylinder SAIJ40BX550-40S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX550-40S 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 SAIJ40BX550-40S
The AirTAC SAIJ40X550-40-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to trim the effective travel by up to 40 mm. This yields a usable stroke window of 510 to 550 mm, letting you dial in the exact end position during commissioning without adding external stops. It delivers a robust 879 N of push force at 0.7 MPa and utilizes a PT tapered port.
This unit includes a SUS304 stainless steel rod for corrosion resistance and an integrated magnet (-S) for position sensing. It is compatible with AirTAC CMSE reed and DMSE electronic solid-state switches, which mount directly into the extruded aluminum barrel's dual sensor grooves. The adjustable rear stopper acts only as a travel limiter and does not hold the load without live air pressure.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX550-40S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX550-40S |
|---|---|
| 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 SAIJ40BX550-40S
| 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 SAIJ40BX550-40S Is Used
Machine Changeover
Fine-tune the 510-550 mm travel window during product size transitions without swapping out the entire cylinder.
Sensor Integration
Utilize the -S magnet with DMSE solid-state sensors in the dual barrel grooves for precise retract position feedback.
Guided Mechanisms
Apply the 879 N output to push guided carriers, ensuring smooth movement over the 550 mm length without rod deflection.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX550-40S the Right Cylinder?
Choose this 40 mm bore when you need more force than the 32 mm version (which provides 563 N push at 0.7 MPa) but want a more compact footprint than the 50 mm option. The adjustable stroke is ideal for machine setups requiring variable end-stops or frequent product changeovers, providing flexibility that a fixed-stroke SAI cylinder cannot match. For load-holding without continuous air pressure, consider a SAIL or BSAI cylinder instead, as the SAIJ adjuster is a stop, not a lock.
With a 550 mm stroke, the 16 mm rod and M12x1.25 thread provide a sturdy interface, but long unsupported strokes still require an external guide to prevent excessive side-loading. To replace an ISO 15552 cylinder, match the 40 mm bore, 550 mm stroke, 40 mm adjustment, PT port, and -S magnet. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2.
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 SAIJ40BX550-40S FAQ
At a 0.7 MPa operating pressure, this 40 mm bore cylinder provides 879 N of push force and 528 N of pull force.
The rear adjuster screw lets you shorten the nominal 550 mm stroke by up to 40 mm, creating a 510-550 mm travel window for precise end-position tuning.
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 SAIJ40BX550-40S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.