Airtac SAIJ100 Adjustable Cylinder SAIJ100BX70-30
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100BX70-30 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 SAIJ100BX70-30
The AirTAC SAIJ100X70-30 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering 3927N of push force at 0.5 MPa. It features a SUS304 stainless steel rod and PT tapered port threads. By integrating an external adjusting screw at the rear, this actuator allows you to shorten the effective stroke by up to 30 mm, creating a precise 40 to 70 mm usable travel window for fine-tuning during commissioning.
This adjustable-stroke design eliminates the need to swap out the entire cylinder or bolt on external stops when dialing in end positions. The rear screw acts purely as a mechanical stop to set the travel end and works in tandem with the standard air cushion, but it does not hold the load without live air pressure. For position holding without continuous air, an external rod lock or a related SAIL pneumatic lock cylinder is required.
Airtac SAIJ100 Adjustable Cylinder SAIJ100BX70-30 Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100BX70-30 |
|---|---|
| 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 SAIJ100BX70-30
| 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 SAIJ100BX70-30 Is Used
Machine Changeover
Dial in the 40-70mm travel window during product size transitions without physically replacing the actuator or adding shims.
Press Fit Tuning
Fine-tune the exact end-of-stroke position for heavy press operations using the rear stopper to compensate for mechanical wear.
Assembly Station Setup
Safely adjust the retraction end-point during initial commissioning to prevent over-travel on delicate 100mm bore tooling.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX70-30 the Right Cylinder?
Choose this 100mm bore actuator when an application demands heavy thrust (up to 7068N push at 0.9 MPa) alongside variable end-stop positioning. If the 40 to 70 mm adjustable travel window is excessive, stepping down to an 80mm bore provides 2513N at 0.5 MPa, whereas larger 125mm bores yield 6136N. The robust 25mm rod and M20x1.5 thread handle substantial side loads, though any stroke exceeding 300mm necessitates an external guide.
To match this ISO 15552 dimensionally interchangeable cylinder, specify the 100mm bore, 70mm nominal stroke, 30mm adjustment range, PT port thread, SUS304 rod material, and the required mounting set (Basic, FA, LB, TC, FTC, TCM1, or TCM2). Note that this variant omits a magnet; adding a CMSE reed or DMSE electronic sensor requires specifying the -S option.
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 SAIJ100BX70-30 FAQ
At 0.5 MPa operating pressure, this 100mm bore cylinder provides 3927N of push force and 3681N of pull force. At 0.9 MPa, the push force increases to 7068N.
The rear adjusting screw acts as a mechanical stop that lets you trim the 70mm nominal stroke back by up to 30mm, providing a usable travel window of 40 to 70mm. It sets the end position but does not lock the load without live air pressure.
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