Airtac SAIJ100 Adjustable Cylinder SAIJ100BX850-20S
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100BX850-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø100mm bore and 850mm 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
- Stroke850 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX850-20S
The AirTAC SAIJ100X850-20-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering a robust 5497N push force at 0.7 MPa. By turning the external stopper screw, you can trim the nominal 850mm travel back by up to 20mm, creating a precise 830-850mm usable window for fine end-position tuning during commissioning. This eliminates the need to swap the cylinder or bolt on external stops when dialing in final positions.
This SKU features a SUS304 stainless steel rod for superior corrosion resistance and includes a magnet for position sensing with CMSE reed or DMSE solid-state switches. The extruded aluminum barrel carries sensor grooves on both sides, and the M20x1.5 rod thread paired with a 25mm rod diameter handles substantial side loads. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ100 Adjustable Cylinder SAIJ100BX850-20S Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100BX850-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø100 mm |
| Stroke | 850 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 SAIJ100BX850-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×850 | 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 SAIJ100BX850-20S Is Used
Variable End Stops
Dial in the exact 830-850mm end position during machine commissioning to accommodate varying product lengths without physically swapping out cylinders.
Product Changeover
Quickly adjust the retract stop on a packaging line when switching to a new package size, reducing downtime and avoiding external stopper hardware.
Sensor Position Setup
Leverage the integrated magnet and dual sensor grooves to mount CMSE or DMSE switches precisely where needed within the adjusted travel window.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX850-20S the Right Cylinder?
Choose this 100mm bore when you need heavy thrust that exceeds the 3518N push force of the 80mm bore at 0.7 MPa, but do not require the massive 6136N output of the 125mm series. The adjustable stroke is ideal for machine setups requiring variable end stops or frequent product-size changeovers, allowing you to reposition the travel endpoint without replacing the entire cylinder.
Because the 850mm stroke is quite long, an external guide is strongly recommended to prevent excessive side-loading on the rod. Remember that the rear adjuster functions only as a travel stop and deceleration aid, not a lock; the cylinder will not hold its load without live air. For load-holding without pressure, consider an SAIL pneumatic lock, a BSAI clamp-lock, or an external rod lock. To match this ISO 15552 interchangeable profile, specify the 100mm bore, 850mm stroke, 20mm adjustment, PT tapered port, and the -S magnet.
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 SAIJ100BX850-20S FAQ
At an operating pressure of 0.7 MPa, this 100mm bore cylinder provides a push force of 5497N and a pull force of 3681N. At 0.5 MPa, it delivers 3927N push and 3681N pull.
The rear adjuster screw acts as a mechanical stop that lets you shorten the effective travel from the nominal 850mm down to 830mm. It sets the deceleration and end position but does not lock the load without live air pressure.
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