Airtac SAIJ50 Adjustable Cylinder SAIJ50AX250-40
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50AX250-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 250mm 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
- Stroke250 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 SAIJ50AX250-40
The AirTAC SAIJ50X250-40 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the effective travel down to 210 mm from its 250 mm nominal length. Delivering 982 N of push force at 0.5 MPa, it integrates a SUS420J2 stainless steel rod (material code A) for improved corrosion resistance in demanding environments. The extruded aluminum barrel includes sensor grooves on both sides for straightforward position feedback.
Equipped with PT tapered ports and a 16 mm rod with an M12x1.25 thread, this model supports a 30-800 mm/s speed range. The rear stopper mechanism acts purely as a travel end-limit for product changeovers—it is not a locking device and cannot hold loads without continuous air pressure.
Airtac SAIJ50 Adjustable Cylinder SAIJ50AX250-40 Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50AX250-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 250 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 SAIJ50AX250-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×250 | 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 SAIJ50AX250-40 Is Used
Variable End-Stop Tuning
Dial in the exact 210 to 250 mm travel distance during machine commissioning to perfectly strike a workpiece without adding external mechanical stops.
Product Size Changeover
Quickly shorten the retract position by up to 40 mm on packaging lines when switching between different box or part sizes, minimizing downtime.
Clamping Force Setup
Fine-tune the approach distance on a 982 N clamping fixture to accommodate varying material thicknesses while maintaining consistent end-positioning.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX250-40 the Right Cylinder?
Choose this 50 mm bore when your application requires the 982 N push force (at 0.5 MPa) stepping up from a 40 mm bore's 628 N, but without the bulk of a 63 mm cylinder. The 40 mm adjustment range is ideal for machine setups requiring variable end-stops during product size changes, avoiding the need to physically swap out a fixed-stroke SAI cylinder.
When integrating this ISO 15552 dimensionally interchangeable cylinder, ensure you use the correct SAIJ mounting subset (Basic, FA, LB, TC, FTC, TCM1, TCM2), as FB, CA, CB, and CR variants are omitted. Because the 250 mm stroke is substantial, an external guide is recommended to prevent excessive side-loading on the M12x1.25 rod. For load-holding without live air, consider the SAIL or BSAI series instead.
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 SAIJ50AX250-40 FAQ
At 0.5 MPa it provides 982 N of push force and 825 N of pull force. The operating speed ranges from 30 to 800 mm/s, supported by adjustable air cushions at both ends.
The rear adjuster screw lets you shorten the effective stroke by up to 40 mm, creating a 210-250 mm travel window. It functions as a mechanical stop for end-position tuning and does not lock the load without air pressure.
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 SAIJ50AX250-40
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.