Airtac SAIJ50 Adjustable Cylinder SAIJ50X250-50S
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50X250-50S 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 SAIJ50X250-50S
The AirTAC SAIJ50X250-50-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, providing a usable travel window of 200 to 250 mm. It features a carbon steel piston rod and a built-in magnet for position sensing. Delivering 982 N of push force at 0.5 MPa, it handles mid-range automation tasks with precision.
Unlike a fixed-stroke SAI unit, this model lets you dial in the retract end-position during commissioning without adding external stops. The rear adjuster acts purely as a travel stop to set the end of stroke, so it does not hold the load without live air pressure. For load-holding requirements, consider the SAIL or BSAI series instead.
Airtac SAIJ50 Adjustable Cylinder SAIJ50X250-50S Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50X250-50S |
|---|---|
| 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 SAIJ50X250-50S
| 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 SAIJ50X250-50S Is Used
Product Changeover
Fine-tune the 200-250 mm retract distance on the fly when switching product sizes on a packaging line, avoiding physical cylinder swaps.
Variable End Stops
Set precise rejection distances for mixed-product conveying without bolting on external stopper blocks.
Commissioning Tuning
Dial in the exact end-of-stroke position during machine setup to perfect timing and avoid mechanical crashes.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50X250-50S the Right Cylinder?
Choose this 50 mm bore when 40 mm falls short (628 N at 0.5 MPa) and 63 mm is excessive (1559 N at 0.5 MPa). The 50 mm bore uses a G1/4 port and a 16 mm rod, offering a balanced footprint for general conveying and assembly. The -S magnet works seamlessly with AirTAC CMSE reed and DMSE electronic sensors fitted into the dual-side barrel grooves.
To replace an ISO 15552 cylinder, match the 50 mm bore, 250 mm stroke, 50 mm adjustment, PT tapered port threads, and your required mounting from the SAIJ subset: Basic, FA, LB, TC, FTC, TCM1, or TCM2. Because the stroke is 250 mm, ensure adequate guidance for the load to prevent 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 SAIJ50X250-50S FAQ
At 0.5 MPa, it provides 982 N of push force and 825 N of pull force. At 0.7 MPa, the push force increases to 1374 N.
The rear adjuster allows you to shorten the 250 mm nominal stroke by up to 50 mm, creating a 200-250 mm travel window. It acts as a physical stop and does not lock the load without air pressure.
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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.
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