Airtac SAIJ50 Adjustable Cylinder SAIJ50AX165-40S
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50AX165-40S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 165mm 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
- Stroke165 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 SAIJ50AX165-40S
The AirTAC SAIJ50X165-40-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a usable travel window of 125-165 mm, allowing you to dial back the nominal 165 mm stroke by up to 40 mm during commissioning. Delivering 982 N of push force at 0.5 MPa, it fits mid-range automation tasks perfectly. The barrel is extruded aluminum with sensor grooves on both sides, and this -S variant includes a magnet for position sensing.
This model uses a SUS420J2 stainless steel rod (option A) for improved corrosion resistance compared to standard carbon steel. It features PT tapered port threads and variable air cushions at both ends to decelerate the load. The rear adjuster acts purely as a mechanical stop to fine-tune the end position without needing external stops, though it does not hold the load without live air pressure.
Airtac SAIJ50 Adjustable Cylinder SAIJ50AX165-40S Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50AX165-40S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 165 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 SAIJ50AX165-40S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×165 | 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 SAIJ50AX165-40S Is Used
Product Changeover
Dial in the 125-165 mm travel window during line changeovers to accommodate different product lengths without physically swapping cylinders.
End-Position Tuning
Fine-tune the retract stroke at machine commissioning using the rear screw stopper, ensuring exact clamping or positioning without external shims.
Assembly Station Setup
Use the 982 N push force and variable end-stop to precisely set press-fit depths on modular assembly lines.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX165-40S the Right Cylinder?
Choose this 50 mm bore when you need 982 N of push force at 0.5 MPa, stepping up from the 40 mm bore (628 N) for heavier clamping or lifting. The 40 mm adjustment range is ideal for product changeovers where exact end-position tuning is critical, avoiding the need to swap out a fixed-stroke SAI cylinder. For strokes of 165 mm, the 20 mm rod and M16x1.5 thread handle moderate side loads, but always guide the load externally to prevent rod binding.
To replace an ISO 15552 cylinder, match the 50 mm bore, 165 mm stroke, 40 mm adjuster, PT G1/4 ports, and the -S magnet. Remember that the SAIJ mounting set is limited to Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR. If your application requires true load-holding without live air, select the SAIL or BSAI series instead, as this rear adjuster is only a travel stop.
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 SAIJ50AX165-40S 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 delivers up to 200 kgf.
The rear adjuster screw acts as a mechanical stop, allowing you to shorten the effective stroke from 165 mm down to 125 mm. It sets the travel end-point but does not lock or hold the load without continuous air pressure.
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