Airtac SAIJ50 Adjustable Cylinder SAIJ50AX425-50
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50AX425-50 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 SAIJ50AX425-50
The AirTAC SAIJ50X425-50 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to trim the effective travel back by up to 50 mm. This creates a usable 375-425 mm stroke window, enabling precise end-position tuning at commissioning without swapping the barrel or adding external stops. It delivers 982 N of push force at 0.5 MPa.
This variant features a SUS420J2 stainless steel rod (code A) for improved corrosion resistance and uses PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides, though this specific SKU is supplied without a magnet. The rear adjuster acts purely as a mechanical stop to set the travel end and does not hold the load without live air pressure.
Airtac SAIJ50 Adjustable Cylinder SAIJ50AX425-50 Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50AX425-50 |
|---|---|
| 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 SAIJ50AX425-50
| 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 SAIJ50AX425-50 Is Used
Machine Changeover
Dial in the exact retract distance within the 375-425 mm window during product size changes on a packaging line without replacing the cylinder.
End-Position Tuning
Fine-tune the final resting position at commissioning using the rear stopper, compensating for mechanical tolerance stack-ups in the fixture.
Adjustable End Stop
Use the built-in stroke adjustment to set variable retract limits for multi-product tooling setups, eliminating the need for bolt-on external stops.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX425-50 the Right Cylinder?
Choose this 50 mm bore when your application requires the 982 N push force at 0.5 MPa. If your setup demands less force, the 40 mm bore offers 628 N; if you need more clamping power, stepping up to the 63 mm bore provides 1559 N. An adjustable stroke is selected over a fixed SAI model when machine changeovers require variable end stops or fine-tuning of the retract position. For load-holding without live pressure, this cylinder is insufficient as the adjuster is not a lock; consider an AirTAC SAIL or BSAI model instead.
When replacing an ISO 15552 cylinder, match these exact attributes: 50 mm bore, 425 mm stroke, 50 mm adjustment range, PT port threads, and no magnet. Because the 425 mm stroke is long, the 20 mm rod diameter and M16x1.5 thread will carry some side load, but an external guide is strongly recommended for any unsupported length to prevent premature seal wear.
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 SAIJ50AX425-50 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 the maximum 1.0 MPa pressure, it can deliver up to 200 kgf.
The rear adjusting screw acts as a mechanical stop, allowing you to shorten the 425 mm nominal stroke by up to 50 mm. This creates a usable travel window of 375-425 mm so you can fine-tune the end position without changing the cylinder.
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 SAIJ50AX425-50
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.