Airtac SAIJ100 Adjustable Cylinder SAIJ100X850-40
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100X850-40 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 SAIJ100X850-40
The AirTAC SAIJ100X850-40 is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It features a 100 mm bore and an 850 mm nominal stroke, yielding a usable travel window of 810 to 850 mm. This built-in adjuster allows you to fine-tune the retract end-position at commissioning without swapping out the entire cylinder or fabricating external stopper blocks. Delivering a robust 5497 N of push force at 0.7 MPa, it is built for heavy-duty positioning tasks.
This extruded aluminum profile cylinder includes variable air cushions at both ends to manage kinetic energy, but note that the rear adjuster acts strictly as a travel stop, not a locking device. It will not hold a load without continuous live air pressure. The unit omits a magnet by default, but adding the -S option enables compatibility with AirTAC CMSE reed and DMSE electronic sensors mounted in the dual-side sensor grooves.
Airtac SAIJ100 Adjustable Cylinder SAIJ100X850-40 Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100X850-40 |
|---|---|
| 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 SAIJ100X850-40
| 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 SAIJ100X850-40 Is Used
Product Changeovers
Dial in the 810-850 mm retract position precisely when switching between product sizes on an assembly line, avoiding the need for custom spacer blocks.
Heavy Press Positioning
Leverage the 7068 N push force at 0.9 MPa to move heavy tooling, using the fine end-stop tuning to set exact material engagement depth.
Long-Stroke Conveying
Actuate large gates or pushers over 850 mm of travel, relying on the adjustable rear stopper to compensate for mechanical drift over time.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100X850-40 the Right Cylinder?
Choose this 100 mm bore when you need substantial thrust, such as the 5497 N push force at 0.7 MPa, stepping up from a 80 mm bore that provides 3518 N. The adjustable 810-850 mm window is ideal for product changeovers on a line where exact end-stops vary slightly between fixtures. If your process requires the load to be held mechanically without air pressure, a plain SAIJ is insufficient; you should look at the SAIL air-released lock or BSAI clamp-lock series instead.
For an exact ISO 15552 dimensional replacement, match the 100 mm bore, 850 mm stroke, 40 mm adjustment range, PT tapered port threads, and your required mounting set. SAIJ supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 mounts, but omits FB, CA, CB, and CR. Because the stroke is 850 mm, the 25 mm carbon steel rod and M20x1.5 rod thread will experience leverage forces; an external guide is highly recommended to prevent excessive side-loading on the barrel.
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 SAIJ100X850-40 FAQ
At 0.5 MPa it provides 3927 N of push force and 3681 N of pull force. If you increase the operating pressure to 0.7 MPa, the push force rises to 5497 N, and it reaches a maximum of 801 kgf at 1.0 MPa.
The rear adjuster screw lets you shorten the effective stroke by up to 40 mm, creating a usable travel window of 810 to 850 mm. This allows you to set the exact retract end-position during commissioning, though it functions only as a stop and does not lock the load without air pressure.
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