Airtac SAIJ50 Adjustable Cylinder SAIJ50BX140-75S
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50BX140-75S 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 SAIJ50BX140-75S
The AirTAC SAIJ50X140-75-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers 982N of push force at 0.5 MPa and features a 140mm nominal stroke that can be fine-tuned down by up to 75mm, creating a highly flexible 65-140mm usable travel window. This wide adjustment range is perfect for machinery requiring frequent product size changeovers without swapping hardware.
Built with a SUS304 stainless steel rod (code B), this unit maximizes corrosion resistance for demanding environments. The -S magnet integrates seamlessly with AirTAC CMSE reed and DMSE electronic sensors housed in the dual-side extruded aluminum barrel grooves. It uses PT tapered ports and supports a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ50 Adjustable Cylinder SAIJ50BX140-75S Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50BX140-75S |
|---|---|
| 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 SAIJ50BX140-75S
| 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 SAIJ50BX140-75S Is Used
Product Changeovers
Dial in the 65-140mm travel window rapidly during packaging line format changes to accommodate varying carton heights without replacing the cylinder.
End-Stop Calibration
Fine-tune the retract end-position during machine commissioning to prevent over-travel and crush damage, using the rear adjuster instead of external stops.
Corrosive Assembly
Leverage the SUS304 stainless steel rod for pushing or clamping tasks in washdown or mildly corrosive manufacturing environments.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50BX140-75S the Right Cylinder?
Select this 50mm bore when an application demands a broad end-position tuning window; stepping down to a 40mm bore drops the 0.5 MPa push force to 628N, while stepping up to 63mm yields 1559N. Choose the SAIJ adjustable format over a fixed SAI cylinder when you need on-the-fly stroke trimming at commissioning rather than machining external stops. The rear screw acts purely as a travel stop, so it will not hold the load without live air—use a SAIL or BSAI cylinder if true locking is required.
For this 140mm stroke, side-load is moderate, but the 20mm rod diameter and M16x1.5 rod thread provide robust resistance. To replace an ISO 15552 cylinder, match the 50mm bore, 140mm stroke, 75mm adjustment, PT G1/4 port, desired mounting, and the -S magnet.
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 SAIJ50BX140-75S FAQ
At 0.5 MPa operating pressure, this 50mm bore cylinder provides 982N of push force and 825N of pull force. It can reach up to 1767N push force at 0.9 MPa.
The rear adjuster screw lets you shorten the 140mm nominal stroke by up to 75mm, yielding a usable travel window of 65-140mm. It acts as a mechanical stop and does not lock the load without continuous air pressure.
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