Airtac SAIJ100 Adjustable Cylinder SAIJ100X70-50S
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100X70-50S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø100mm bore and 70mm 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
- Stroke70 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ100 Adjustable Cylinder SAIJ100X70-50S
The AirTAC SAIJ100X70-50-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering 3927N of push force at 0.5 MPa. By integrating a 50mm adjustment mechanism onto a 70mm nominal stroke, this unit provides a usable travel window of 20 to 70mm. This built-in adjustability allows you to fine-tune the retract end position at commissioning without swapping out the cylinder or adding external stops. It features a standard carbon steel rod and a PT tapered port thread.
Because this is an adjustable-stroke variant, it utilizes a reduced mounting accessory set comprising Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting the FB, CA, CB, and CR options. The included magnet (-S) supports position sensing via AirTAC CMSE reed or DMSE electronic solid-state switches. Remember that the rear adjuster acts as a travel stop and deceleration aid, not a load-holding lock; for true position holding without live air pressure, consider the SAIL or BSAI series.
Airtac SAIJ100 Adjustable Cylinder SAIJ100X70-50S Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100X70-50S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø100 mm |
| Stroke | 70 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 SAIJ100X70-50S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×70 | 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 SAIJ100X70-50S Is Used
Machine Setup Tuning
Dial in the exact retract end position during initial commissioning using the 20-70mm travel window, avoiding the need to machine custom spacers.
Product Changeover
Quickly adapt a packaging line to different carton sizes by adjusting the stroke back from 70mm to 20mm on the fly without changing the actuator.
Variable End Stops
Use the rear stopper to set precise deceleration points for heavy 3927N loads, ensuring consistent positioning across repetitive cycles.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100X70-50S the Right Cylinder?
Choose this 100mm bore when an application requires substantial thrust—stepping down to an 80mm bore yields 2513N at 0.5MPa, while this 100mm unit provides 3927N. An adjustable stroke is highly beneficial for machine setups requiring variable end stops or frequent product-size changeovers, offering flexibility that a fixed-stroke SAI cylinder cannot match. When replacing an ISO 15552 cylinder, match the 100mm bore, 70mm stroke, 50mm adjustment, G1/2 port, PT thread, and the -S magnet requirement. Although the 25mm rod and M20x1.5 thread handle high side loads, any stroke over 300mm would require an external guide; at 70mm, the internal bearing is fully sufficient.
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 SAIJ100X70-50S FAQ
At 0.5 MPa operating pressure, this 100mm bore cylinder provides 3927N of push force and 3681N of pull force. At the maximum pressure of 1.0 MPa, it can deliver up to 801 kgf.
The rear adjuster screw allows you to trim the effective stroke by up to 50mm. With a 70mm nominal stroke, this creates a usable travel window of 20 to 70mm, letting you set the exact retract end position during setup.
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