Airtac SAIJ50 Adjustable Cylinder SAIJ50AX240-75S
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50AX240-75S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 240mm 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
- Stroke240 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 SAIJ50AX240-75S
The AirTAC SAIJ50X240-75-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to trim the effective travel down by up to 75 mm. This yields a usable window of 165-240 mm, giving you immediate flexibility for product changeovers without swapping the barrel. It delivers 982 N of push force at 0.5 MPa and 1767 N at 0.9 MPa, making it well-suited for moderate-load handling tasks.
This specific configuration includes an SUS420J2 stainless steel piston rod (option A) for improved corrosion resistance over standard carbon steel. The -S magnet enables position feedback via AirTAC CMSE reed or DMSE electronic sensors housed in the dual-side extruded barrel grooves. It uses a PT tapered G1/4 port and relies on the standard SAIJ mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2) without FB or rear pivot options.
Airtac SAIJ50 Adjustable Cylinder SAIJ50AX240-75S Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50AX240-75S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 240 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 SAIJ50AX240-75S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×240 | 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 SAIJ50AX240-75S Is Used
Machine Changeover
Dial in the 165-240 mm travel window during product size transitions to set new retract stops without physically swapping cylinders or adding external spacers.
End-Position Tuning
Fine-tune the exact retract end-position during commissioning to compensate for mechanical wear or sensor drift, ensuring precise placement every cycle.
Variable Stop Diverter
Adjust the stroke on the fly for a diverter arm handling different package lengths on a single conveyor line, maximizing layout flexibility.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX240-75S the Right Cylinder?
Choose this 50 mm bore when your application demands around 982 N of thrust at 0.5 MPa, stepping up from a 40 mm bore (628 N) or down from a 63 mm bore (1559 N). The 75 mm adjustment range is ideal for machines that process varying part sizes, allowing operators to dial in the exact retract end-position during commissioning rather than machining custom spacers. Remember that the rear adjuster functions strictly as a travel stop, not a lock; the cylinder will not hold a load without live air pressure, so consider an AirTAC SAIL or BSAI for fail-safe load holding.
To match this ISO 15552 interchangeable cylinder exactly, specify a 50 mm bore, 240 mm nominal stroke, 75 mm adjustment range, PT G1/4 port thread, SUS420J2 rod material, and the -S magnet option. With a 240 mm stroke, the 16 mm rod provides adequate rigidity, but any future upgrades to longer standard strokes approaching 1200 mm should incorporate an external guide rail to prevent excessive side-loading on the rod seals.
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 SAIJ50AX240-75S FAQ
The rear adjuster screw acts as a mechanical stop that lets you shorten the 240 mm nominal stroke by up to 75 mm, providing a usable travel window of 165-240 mm. It sets the retract end-position but does not lock the load without continuous air pressure.
At a 0.5 MPa operating pressure, the SAIJ50X240-75-S provides 982 N of push force and 825 N of pull force. At 0.9 MPa, the push force increases to 1767 N.
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