Airtac SAIJ100 Adjustable Cylinder SAIJ100X850-20
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100X850-20 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 SAIJ100X850-20
The AirTAC SAIJ100X850-20 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster, delivering a robust 7068N of push force at 0.9 MPa. With a nominal 850 mm stroke and a 20 mm adjustment range, it provides an exact 830-850 mm usable travel window. This built-in adjustability allows you to fine-tune the retract end position during commissioning without swapping out the entire cylinder or adding external stops.
Built with a sturdy 25 mm carbon steel rod and M20x1.5 rod thread, this 100 mm bore unit handles high side loads effectively, though an 850 mm stroke still requires an external guide to prevent rod sagging. The extruded aluminum barrel incorporates sensor grooves on both sides for CMSE or DMSE switches, and it omits the FB, CA, CB, and CR mounting options, utilizing a focused set of Basic, FA, LB, TC, FTC, TCM1, and TCM2 interfaces.
Airtac SAIJ100 Adjustable Cylinder SAIJ100X850-20 Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100X850-20 |
|---|---|
| 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 SAIJ100X850-20
| 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 SAIJ100X850-20 Is Used
Machine Setup Calibration
Dial in the exact 830-850 mm retract position during initial machine commissioning to perfectly align heavy stamping or pressing dies without machining custom spacers.
Product Size Changeover
Adapt automated assembly lines to new product lengths by turning the rear adjuster screw, shifting the end-of-stroke stop quickly for a new fixture format.
Variable End Stops
Provide adjustable physical stops for heavy pallet positioning on a conveyor, allowing operators to tweak the travel limit by up to 20 mm as process requirements evolve.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100X850-20 the Right Cylinder?
Selecting this 100 mm bore cylinder makes sense when your application requires the 7068N force at 0.9 MPa and variable end-stopping, which a fixed-stroke SAI cannot provide. If your setup needs slightly less push force, stepping down to an 80 mm bore yields 4523N at 0.9 MPa. To match this exact ISO 15552 replacement, specify the 100 mm bore, 850 mm stroke, 20 mm adjustment, PT G1/2 port, and the desired mounting style. Because the 850 mm stroke exceeds 300 mm, incorporating an external guide rail is critical to manage side loads and maintain alignment.
Keep in mind the rear adjuster acts strictly as a travel stop to set deceleration endpoints, not as a locking device. If your machinery must hold a load safely without continuous live air pressure, you must integrate an external rod lock, a pilot-operated check valve, or switch to AirTAC SAIL or BSAI clamp-lock cylinders.
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 SAIJ100X850-20 FAQ
This 100 mm bore cylinder generates 3927N of push force at 0.5 MPa and up to 7068N at 0.9 MPa. The pull force at 0.5 MPa is 3681N.
The rear adjusting screw acts as a stopper that lets you shorten the effective stroke by up to 20 mm, creating a usable travel window of 830-850 mm. It is a travel stop for end-position tuning, not a load-holding lock.
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