Airtac SAIJ50 Adjustable Cylinder SAIJ50BX140-40S
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50BX140-40S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 140mm 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.
- BoreØ50 mm
- Stroke140 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 30 mm
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SAIJ50 Adjustable Cylinder SAIJ50BX140-40S
The AirTAC SAIJ50X140-40-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, enabling a usable travel window of 100-140 mm from its 140 mm nominal stroke. Delivering 982 N of push force at 0.5 MPa, it integrates a SUS304 stainless steel rod for corrosion resistance and a magnet for CMSE or DMSE sensor integration.
The rear adjuster allows precise end-position tuning during commissioning without adding external stops. It acts solely as a travel stop, so live air is required to maintain position. The extruded aluminum barrel features sensor grooves on both sides, and the mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ50 Adjustable Cylinder SAIJ50BX140-40S Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50BX140-40S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 140 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M16×1.5 |
| 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 (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ50 Adjustable Cylinder SAIJ50BX140-40S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×140 | 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 SAIJ50 Adjustable Cylinder SAIJ50BX140-40S Is Used
Machine Changeover
Dial in the exact 100-140 mm end-stop during product size changes without swapping the physical cylinder.
End-Position Tuning
Fine-tune the retract position at commissioning using the rear adjuster to perfect machine timing.
Variable Assembly Stops
Adapt the stroke window on the fly for assembly lines handling multiple part lengths.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50BX140-40S the Right Cylinder?
Choose this 50 mm bore when a 40 mm bore yields insufficient thrust (628 N at 0.5 MPa) or a 63 mm bore is excessive (1559 N). The 40 mm adjustment range is ideal for product changeovers requiring variable end-stops. For load-holding without live pressure, select SAIL or BSAI variants, as this adjuster is not a lock. This PT-ported cylinder is dimensionally interchangeable per ISO 15552. The 16 mm rod and M12x1.25 thread handle side loads well, though external guides are recommended for long unsupported travel.
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 SAIJ50 Adjustable Cylinder SAIJ50BX140-40S FAQ
At 0.5 MPa it provides 982 N push and 825 N pull force. At 0.7 MPa the push force increases to 1374 N.
The rear adjuster trims the 140 mm nominal stroke, creating a 100-140 mm usable travel window for fine-tuning without external stops.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
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