Airtac SAIJ50 Adjustable Cylinder SAIJ50X425-100S
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50X425-100S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 425mm 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
- Stroke425 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 SAIJ50X425-100S
The AirTAC SAIJ50X425-100-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, providing a usable travel window of 325 to 425 mm. Generating 982 N of push force at 0.5 MPa, it features a carbon steel piston rod and a PT tapered port thread. The integrated -S magnet enables position sensing with AirTAC CMSE reed or DMSE electronic solid-state switches.
Because the stroke extends past 300 mm, the 20 mm rod diameter requires external guiding to prevent excessive side-loading on the seals. The rear adjustment mechanism acts purely as a travel stop for end-position tuning during commissioning; it does not lock or hold the load without continuous air pressure. For load-holding requirements, consider the SAIL or BSAI series instead.
Airtac SAIJ50 Adjustable Cylinder SAIJ50X425-100S Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50X425-100S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 425 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 SAIJ50X425-100S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×425 | 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 SAIJ50X425-100S Is Used
Variable End-Stop Configuration
Dial in the exact retraction point within the 325-425 mm window during machine commissioning to accommodate different material lengths without adding external physical stops.
Product Size Changeovers
Quickly adjust the rear travel stop on packaging or sorting lines when switching between different product dimensions, minimizing downtime between production runs.
Sensor-Driven Positioning
Leverage the built-in magnet for CMSE or DMSE sensors to confirm end-of-stroke positions while fine-tuning the mechanical stopper for precise assembly tasks.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50X425-100S the Right Cylinder?
Select this 50 mm bore when an application requires moderate thrust (982 N push at 0.5 MPa) alongside a highly flexible end-stop. If your setup demands greater force, stepping up to the 63 mm bore yields 1559 N. The 100 mm adjustment range is ideal for machines processing varying product sizes, allowing you to dial in the exact retraction point without swapping cylinders.
When replacing an ISO 15552 cylinder, match the 50 mm bore, 425 mm nominal stroke, PT port thread, and the required mounting accessory from the SAIJ subset (Basic, FA, LB, TC, FTC, TCM1, TCM2). Note that FB, CA, CB, and CR mounts are omitted from this adjustable series. Given the 425 mm stroke, ensure your framework includes an external guide to support the load and protect the rod.
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 SAIJ50X425-100S FAQ
At 0.5 MPa operating pressure, this 50 mm bore cylinder 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 screw acts as a mechanical stop, allowing you to shorten the effective stroke from its 425 mm nominal length down to 325 mm. This stopper only sets the travel end and does not hold the load without live air pressure.
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