Airtac SAIJ50 Adjustable Cylinder SAIJ50AX25-20S
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50AX25-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 25mm 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
- Stroke25 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 SAIJ50AX25-20S
The AirTAC SAIJ50X25-20-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. Equipped with a SUS420J2 stainless steel rod and a position magnet, it provides a usable travel window of 5-25 mm. This allows operators to dial back the 25 mm nominal stroke by up to 20 mm during commissioning without adding external stops. In the 50 mm bore class, it delivers 982 N of push thrust at 0.5 MPa.
The rear adjuster acts strictly as a travel stop for end-position tuning and deceleration, meaning it will not hold the load without live air pressure. For load-holding without supply pressure, consider the SAIL or BSAI series. This extruded aluminum profile cylinder includes sensor grooves on both sides, supporting AirTAC CMSE reed and DMSE electronic solid-state switches. The mounting set is a reduced subset of Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ50 Adjustable Cylinder SAIJ50AX25-20S Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50AX25-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 25 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 SAIJ50AX25-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×25 | 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 SAIJ50AX25-20S Is Used
Machine Changeover
Fine-tune the 5-25 mm travel window during product-size changeovers without physically swapping the cylinder or adding external mechanical stops.
End-Position Tuning
Dial in the exact retract end-position at commissioning using the rear adjuster screw, perfect for precision assembly actuators.
Short-Stroke Clamping
Use the 982 N push force at 0.5 MPa to secure parts, relying on the rear stop to set the exact clamp position within the 5-25 mm window.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX25-20S the Right Cylinder?
Choose this 50 mm bore when an application requires around 982 N of push force at 0.5 MPa, or step down to a 40 mm bore for 628 N if the load is lighter. The adjustable stroke is ideal for machine setups requiring variable end-stops or product-size changeovers, offering more flexibility than a fixed-stroke SAI cylinder. When replacing an ISO 15552 cylinder, match the 50 mm bore, 25 mm stroke, 20 mm adjustment, PT tapered port thread, and the -S magnet. Even at this short 25 mm stroke, ensure proper alignment to avoid excessive rod side-loading.
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 SAIJ50AX25-20S FAQ
This 50 mm bore cylinder generates 982 N of push force and 825 N of pull force at 0.5 MPa, scaling up to 1374 N push at 0.7 MPa.
The rear adjuster allows you to shorten the 25 mm nominal stroke by up to 20 mm, creating a usable 5-25 mm travel window for fine-tuning the retract end-position.
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.
Request a Quote for Airtac SAIJ50 Adjustable Cylinder SAIJ50AX25-20S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.