Airtac SAIJ50 Adjustable Cylinder SAIJ50AX120-40
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50AX120-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 120mm 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
- Stroke120 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 SAIJ50AX120-40
The AirTAC SAIJ50X120-40 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to dial back the 120 mm nominal travel by up to 40 mm, creating an 80-120 mm usable window. This built-in adjustability enables precise end-position tuning during commissioning without swapping out the cylinder or adding external stops. It delivers a robust 982 N push force at 0.5 MPa, making it well-suited for mid-range actuation tasks.
This SKU is configured with a SUS420J2 stainless steel rod (option A) for enhanced corrosion resistance and features PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides for flexible mounting of CMSE reed or DMSE electronic switches. Remember that the rear adjuster acts only as a travel stop to set deceleration; it does not hold the load without live air pressure.
Airtac SAIJ50 Adjustable Cylinder SAIJ50AX120-40 Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50AX120-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 120 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 SAIJ50AX120-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×120 | 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 SAIJ50AX120-40 Is Used
Machine Setup & Changeover
Dial in the exact 80-120 mm end-position during line changeovers without machining new hard stops.
Variable End Stops
Fine-tune the retract position on the fly to accommodate varying material thicknesses or part dimensions.
Assembly Station Tuning
Precisely set the pressing depth for fittings or pins, relying on the 982 N push force at 0.5 MPa.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX120-40 the Right Cylinder?
Choose this 50 mm bore if you need more thrust than the 40 mm option (which provides 628 N push at 0.5 MPa) but want a more compact footprint than the 63 mm bore (1559 N push). The 40 mm adjustment range is ideal for machinery that frequently undergoes product-size changeovers, allowing operators to reposition the end-stop quickly. For load-holding requirements without continuous air pressure, this cylinder is not a lock; consider the AirTAC SAIL or BSAI series instead.
When replacing an ISO 15552 cylinder, match the 50 mm bore, 120 mm stroke, and 40 mm adjustment range. Ensure your setup uses the PT port threads and the SAIJ mounting set, which supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 attachments. Since the stroke is under 300 mm, side-load stress is minimal, but always ensure the M16x1.5 rod thread is properly aligned to prevent binding.
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 SAIJ50AX120-40 FAQ
At a 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 adjuster screw acts as a mechanical stop that lets you shorten the effective stroke from the 120 mm nominal length down to as little as 80 mm. This allows fine-tuning of the end position during commissioning, but it does not lock or hold the load without live air pressure.
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