Airtac SAIJ100 Adjustable Cylinder SAIJ100BX70-50
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100BX70-50 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 SAIJ100BX70-50
The AirTAC SAIJ100X70-50 is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear-mounted stroke adjuster. It provides a nominal 70 mm stroke that can be dialed back by up to 50 mm, creating a highly versatile 20-70 mm usable travel window for precise end-position tuning. Featuring a robust 25 mm SUS304 stainless steel rod (code B) and a G1/2 port, it delivers 3927 N of push force at 0.5 MPa, scaling up to 7068 N at 0.9 MPa.
Because the rear screw acts as a mechanical stop rather than a locking device, it allows you to trim the travel during commissioning or product changeovers without swapping out the entire actuator or adding external stops. This adjustable-stroke variant utilizes a reduced mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2) and retains standard sensor grooves on both sides of the extruded aluminum barrel for flexible switch placement.
Airtac SAIJ100 Adjustable Cylinder SAIJ100BX70-50 Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100BX70-50 |
|---|---|
| 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 SAIJ100BX70-50
| 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 SAIJ100BX70-50 Is Used
Product Changeover
Dial in the 20-70 mm travel window during packaging line format changes to accommodate different carton sizes without physically swapping the cylinder.
End-Stop Calibration
Fine-tune the retract position during machine commissioning to perfect the mating of heavy 100 mm bore tooling without relying on external stopper blocks.
Variable Positioning
Set precise, repeatable end-positions for heavy clamping or pressing tasks that require up to 7068 N of force at 0.9 MPa but need slight travel adjustments between batches.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX70-50 the Right Cylinder?
Select this 100 mm bore actuator when your application requires substantial thrust—such as 5497 N at 0.7 MPa—but also demands variable end-stops for machine setup or product-size changes. If your process needs less force, stepping down to an 80 mm bore yields 2513 N at 0.5 MPa, whereas moving up to a 125 mm bore provides 6136 N. The SAIJ100X70-50 is chosen over a fixed-stroke SAI specifically when you need that 20-70 mm travel window to dial in the retract position on the fly.
For an exact ISO 15552 replacement match, ensure you specify the 100 mm bore, 70 mm nominal stroke, 50 mm adjustment range, PT tapered port thread, SUS304 rod material, and the appropriate mounting bracket. Remember that the rear adjuster only halts the piston; it does not hold the load without live air pressure. For true fail-safe load holding, you would need to specify an SAIL air-released lock cylinder, a BSAI clamp-lock, or an external rod lock.
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 SAIJ100BX70-50 FAQ
At 0.5 MPa operating pressure, this 100 mm bore cylinder provides 3927 N of push force and 3681 N of pull force. If you increase the pressure to 0.9 MPa, the push force reaches 7068 N.
The SAIJ100X70-50 has a nominal 70 mm stroke with a 50 mm adjustment range, giving you a usable travel window of 20 to 70 mm. The rear adjuster screw acts as a mechanical stop to trim the retract position, but it is not a lock and will not hold the load without continuous air pressure.
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