Airtac SAIJ100 Adjustable Cylinder SAIJ100BX70-20S
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100BX70-20S 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 SAIJ100BX70-20S
The AirTAC SAIJ100X70-20-S is a double-acting ISO 15552 profile cylinder with a rear stroke adjuster. It delivers 3927N of push force at 0.5 MPa and features a SUS304 stainless steel rod for superior corrosion resistance. The integrated -S magnet works seamlessly with AirTAC CMSE reed and DMSE electronic sensors, fitting directly into the dual-side sensor grooves.
With a nominal 70 mm stroke and a 20 mm adjustment range, this model provides a usable travel window of 50 to 70 mm. You can fine-tune the retract end position at commissioning without adding external stops or swapping the cylinder. The rear adjuster acts purely as a travel stop to set deceleration, not as a lock, so it will not hold a load without live air pressure.
Airtac SAIJ100 Adjustable Cylinder SAIJ100BX70-20S Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100BX70-20S |
|---|---|
| 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 SAIJ100BX70-20S
| 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 SAIJ100BX70-20S Is Used
Machine Changeover
Dial in the exact 50-70 mm retract position during product size changes without swapping hardware.
End-Stop Tuning
Fine-tune the final deceleration point at commissioning using the rear adjuster rather than external stops.
Corrosive Push Operations
Leverage the 3927N push force and SUS304 rod for high-force clamping in washdown environments.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX70-20S the Right Cylinder?
Choose this 100 mm bore over the 80 mm option when you need more thrust, stepping up from 2513N to 3927N at 0.5 MPa. The adjustable stroke is ideal for machine changeovers where exact end positions vary slightly. For load-holding without live air pressure, this cylinder is insufficient; you must use an external rod lock or select a SAIL or BSAI model instead.
To match this ISO 15552 cylinder for a replacement, verify the 100 mm bore, 70 mm stroke, 20 mm adjustment range, PT port thread, and the -S magnet option. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2, deliberately omitting FB, CA, CB, and CR configurations. The 20 mm rod thread handles high side loads well, but always use an external guide for unsupported 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 SAIJ100 Adjustable Cylinder SAIJ100BX70-20S FAQ
At 0.5 MPa, it provides 3927N of push force and 3681N of pull force. At 0.9 MPa, the push force reaches 7068N.
The rear adjuster lets you shorten the 70 mm nominal stroke by up to 20 mm, giving a usable travel window of 50 to 70 mm. It acts as a mechanical stop for end-position tuning, not a load lock.
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Standard models usually ship in 3-4 days.
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