Airtac SAIJ50 Adjustable Cylinder SAIJ50BX140-40
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50BX140-40 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 SAIJ50BX140-40
The AirTAC SAIJ50X140-40 is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a nominal 140 mm stroke that can be fine-tuned backward by up to 40 mm, creating a 100-140 mm usable travel window for precise end-position calibration. Delivering 982 N of push thrust at 0.5 MPa, it is built with a SUS304 stainless steel rod (option B) for superior corrosion resistance.
This extruded aluminum profile barrel includes sensor grooves on both sides for flexible switch mounting, though this specific SKU is configured without a magnet. Air enters via PT tapered port threads (G1/4), and the unit relies on variable air cushions at both ends to decelerate the load. The rear stopper mechanism sets the travel end without locking the load, meaning live air pressure is required to hold position.
Airtac SAIJ50 Adjustable Cylinder SAIJ50BX140-40 Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50BX140-40 |
|---|---|
| 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 SAIJ50BX140-40
| 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 SAIJ50BX140-40 Is Used
End-Position Tuning
Dial in the exact 100-140 mm travel distance during commissioning without adding external physical stops to the machine frame.
Product Changeover
Quickly adjust the retract end-position by up to 40 mm to accommodate varying product sizes on a single conveyor line.
Corrosive Assembly
Leverage the SUS304 stainless steel rod option for light-duty pressing or positioning tasks in washdown or mildly corrosive environments.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50BX140-40 the Right Cylinder?
Choose this 50 mm bore cylinder when an application requires 982 N of push force at 0.5 MPa (or 1374 N at 0.7 MPa). If your setup demands less force, stepping down to a 40 mm bore yields 628 N at 0.5 MPa, while a 63 mm bore provides 1559 N for heavier loads. The 40 mm adjustment range is ideal for machine setups requiring variable end stops during product changeovers, avoiding the need to physically swap out a fixed-stroke SAI cylinder.
For dimensionally interchangeable ISO 15552 replacements, match the 50 mm bore, 140 mm stroke, PT port thread, and the SAIJ mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2). Because this unit lacks a piston magnet, it cannot host CMSE or DMSE sensors. If position holding without live air pressure is required, consider the SAIL or BSAI series, as this rear adjuster acts only as a travel stop, not a brake.
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 SAIJ50BX140-40 FAQ
It features a rear external adjusting screw that allows you to shorten the effective stroke by up to 40 mm. This creates a usable travel window of 100 to 140 mm, letting you fine-tune the retract end position at commissioning without swapping the cylinder.
At 0.5 MPa operating pressure, it provides 982 N of push force and 825 N of pull force. At 0.7 MPa, the push force increases to 1374 N.
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