Airtac SAIJ50 Adjustable Cylinder SAIJ50AX125-20
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50AX125-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 125mm 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
- Stroke125 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 SAIJ50AX125-20
The AirTAC SAIJ50X125-20 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a 105-125 mm usable travel window, allowing you to dial back the nominal 125 mm stroke by up to 20 mm. Delivering 982 N push force at 0.5 MPa, it suits mid-range actuation tasks.
This variant uses a SUS420J2 stainless steel rod (option A) for better corrosion resistance than standard carbon steel. It features PT tapered ports and lacks a magnet, meaning position sensing requires external hardware rather than CMSE or DMSE switches.
Airtac SAIJ50 Adjustable Cylinder SAIJ50AX125-20 Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50AX125-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 125 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 SAIJ50AX125-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×125 | 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 SAIJ50AX125-20 Is Used
End-Position Tuning
Dial in the exact retract distance within the 105-125 mm window during machine commissioning to perfect product handling.
Product Changeover
Quickly adapt the stroke end-stop on a packaging line when switching to a different sized item without changing hardware.
Assembly Station Setup
Precisely set the pressing depth for a 982 N operation, adjusting on the fly to accommodate material variances.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX125-20 the Right Cylinder?
Choose this adjustable model when you need fine end-position tuning at commissioning or during product changeover without swapping cylinders or adding external stops. If you need higher force, stepping up to the 63 mm bore yields 1559 N at 0.5 MPa; if less is required, the 40 mm bore provides 628 N.
The rear adjuster acts purely as a travel stop and does not hold the load without live air pressure. For genuine fail-safe load holding, consider the SAIL or BSAI series. This SAIJ model uses the reduced mounting set: Basic, FA, LB, TC, FTC, TCM1, and TCM2.
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 SAIJ50AX125-20 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 125 mm down to as little as 105 mm. This creates a 20 mm travel window for fine-tuning without replacing the cylinder.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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Most inquiries answered within 7-8 hours.
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