Airtac SAIJ100 Adjustable Cylinder SAIJ100BX70-50S
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100BX70-50S 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 SAIJ100BX70-50S
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. It features a SUS304 stainless steel rod for superior corrosion resistance and includes a magnet (-S) for use with CMSE reed and DMSE electronic sensors. With a nominal 70mm stroke and a 50mm adjustment range, you can dial the effective travel down to a 20-70mm window during commissioning.
This bore size utilizes a G1/2 port and M20x1.5 rod thread, providing a robust interface for high-thrust tasks. The extruded aluminum barrel incorporates sensor grooves on both sides for flexible switch mounting. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2, deliberately omitting FB, CA, CB, and CR configurations.
Airtac SAIJ100 Adjustable Cylinder SAIJ100BX70-50S Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100BX70-50S |
|---|---|
| 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 SAIJ100BX70-50S
| 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 SAIJ100BX70-50S Is Used
Product Changeover
Dial in the 20-70mm travel window on the fly to accommodate different package sizes on a packaging line without changing the cylinder.
Machine Setup
Fine-tune the end-of-stroke position during initial commissioning to perfect pressing forces, avoiding the need for external mechanical stops.
Variable End Stops
Use the 50mm rear adjuster to modify the retraction point dynamically for high-thrust assembly operations requiring precise positioning.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX70-50S the Right Cylinder?
Choose this 100mm bore when an 80mm bore (2513N push at 0.5 MPa) lacks the necessary thrust, but a 125mm bore is excessive. The 50mm adjustment code is ideal for applications requiring significant end-position tuning or product changeover without swapping cylinders, offering a usable 20-70mm travel window. For fixed-position tasks without the need for commissioning adjustments, a standard SAI cylinder is sufficient.
When replacing an ISO 15552 cylinder, match the 100mm bore, 70mm stroke, 50mm adjustment, PT port threads, and -S magnet. Remember that the rear adjuster acts only as a travel stop to set deceleration alongside the air cushions; it does not hold the load without live air. For dead-air load holding, consider an AirTAC SAIL or BSAI cylinder.
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 SAIJ100BX70-50S FAQ
At 0.5 MPa operating pressure, this 100mm bore cylinder provides 3927N of push force and 3681N of pull force. At 0.7 MPa, the push force increases to 5497N.
The rear adjuster allows you to trim the nominal 70mm stroke back by up to 50mm, creating a usable travel window of 20-70mm. The adjuster functions as a mechanical stop and does not lock the load without continuous air pressure.
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