Airtac SAIJ100 Adjustable Cylinder SAIJ100AX155-20S
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100AX155-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø100mm bore and 155mm stroke, G1/2 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ100 mm
- Stroke155 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ100 Adjustable Cylinder SAIJ100AX155-20S
The AirTAC SAIJ100X155-20-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, providing a usable travel window of 135-155 mm. It delivers robust thrust, generating 3927 N of push force and 3681 N of pull force at a 0.5 MPa operating pressure. The extruded aluminum barrel features sensor grooves on both sides, and because this unit includes the -S magnet, it directly supports AirTAC CMSE reed and DMSE electronic solid-state switches for precise position feedback.
This model features a SUS420J2 stainless steel rod (option A) for enhanced corrosion resistance compared to standard carbon steel. The rear adjustment screw acts purely as a travel stop for end-position tuning during commissioning; it does not hold the load without live air pressure. For load-holding requirements without continuous air, an external SAIL pneumatic lock or BSAI clamp-lock cylinder is recommended instead.
Airtac SAIJ100 Adjustable Cylinder SAIJ100AX155-20S Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100AX155-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø100 mm |
| Stroke | 155 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| Rod thread | M20×1.5 |
| 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, 36 mm |
| Max stroke | Up to 1500 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 (Ø100mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3927 N | 3682 N |
| 0.7 MPa | 5498 N | — |
| Max (@1.0 MPa) | 801 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ100 Adjustable Cylinder SAIJ100AX155-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 100 | 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 SAIJ100 Adjustable Cylinder SAIJ100AX155-20S Is Used
Product Changeover Tuning
Dial in the exact 135-155 mm end position during packaging line format changes without replacing the cylinder or bolting on external stops.
Machine Setup Calibration
Fine-tune the retract end-stop during initial commissioning to perfect the seating force of large 3927 N assemblies.
Variable End-Stop Forming
Adjust the travel limit on the fly for custom metal forming jobs that require slightly different stroke depths per batch.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100AX155-20S the Right Cylinder?
Select this 100 mm bore when an 80 mm bore (providing 2513 N push at 0.5 MPa) is insufficient for your load, but a 125 mm bore (6136 N) would be excessive overkill. The 20 mm adjustable range is ideal for product changeovers, allowing you to dial in the exact end-stop without swapping the cylinder or adding external mechanical stops. The PT (tapered) port threads match the G1/2 port size for this bore.
When replacing an ISO 15552 cylinder, match the 100 mm bore, 155 mm stroke, 20 mm adjustment range, PT port, and -S magnet. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options, omitting FB, CA, CB, and CR. Because the 25 mm rod diameter and M20x1.5 rod thread handle high side loads well, this cylinder is robust, though long unsupported strokes still require an external guide.
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 SAIJ100 Adjustable Cylinder SAIJ100AX155-20S FAQ
At 0.5 MPa, it provides 3927 N of push force and 3681 N of pull force. At 0.9 MPa, the push force reaches 7068 N.
The rear adjuster screw lets you trim the 155 mm nominal stroke back by up to 20 mm, creating a 135-155 mm travel window. It acts as a mechanical stop and does not lock the load without live air.
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