Airtac SAIJ50 Adjustable Cylinder SAIJ50AX155-100S
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50AX155-100S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 155mm 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
- Stroke155 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 SAIJ50AX155-100S
The AirTAC SAIJ50X155-100-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the effective travel down from 155 mm to a 55 mm minimum. Operating at 0.5 MPa, it delivers 982 N of push thrust and 825 N of pull thrust. This variant includes a magnet for position sensing and uses a SUS420J2 stainless steel rod for improved corrosion resistance.
Instead of relying on external stops, the integrated rear screw lets you dial in the exact end position during machine commissioning or product changeovers. The extruded aluminum barrel provides sensor grooves on both sides for flexible mounting of CMSE reed or DMSE electronic switches. Remember that this rear adjuster acts only as a travel stop to set deceleration, not as a load-holding brake.
Airtac SAIJ50 Adjustable Cylinder SAIJ50AX155-100S Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50AX155-100S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 155 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 SAIJ50AX155-100S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×155 | 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 SAIJ50AX155-100S Is Used
Variable End-Stop Tuning
Dial in the exact retract distance between 55 and 155 mm during machine setup without physically swapping the cylinder or adding external mechanical stops.
Product Size Changeover
Quickly adapt the stroke end position on a packaging line when processing different product lengths, leveraging the 100 mm adjustment range.
Corrosion-Resistant Actuation
Utilize the SUS420J2 stainless steel rod in environments with higher humidity or mild chemical exposure while maintaining precise end-position control.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX155-100S the Right Cylinder?
Choose this 50 mm bore model when your application requires a wide adjustable stroke window of 55-155 mm for frequent size changeovers. If you need less force, stepping down to a 40 mm bore yields 628 N of push thrust at 0.5 MPa, whereas stepping up to a 63 mm bore provides 1559 N. This SAIJ variant uses PT tapered port threads and supports the reduced SAIJ mounting set: Basic, FA, LB, TC, FTC, TCM1, and TCM2.
For any installation requiring the load to be held securely without continuous live air pressure, a plain SAIJ cylinder is insufficient since the adjuster and air cushions only manage travel ends. In those cases, consider an AirTAC SAIL pneumatic lock, a BSAI clamp-lock cylinder, or an external pilot-operated check valve. Because this unit has a 155 mm stroke, side loads are moderate, but an external guide is still recommended for heavy lateral loads.
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 SAIJ50AX155-100S FAQ
The rear external adjusting screw acts as a mechanical stopper that shortens the effective stroke. For this model, you can trim the nominal 155 mm stroke back by up to 100 mm, giving an actual usable travel window of 55 to 155 mm.
At a standard operating pressure of 0.5 MPa, the SAIJ50X155-100-S provides 982 N of push thrust and 825 N of pull thrust. It can reach up to 1767 N of push thrust at 0.9 MPa.
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