Airtac SAIJ100 Adjustable Cylinder SAIJ100BX850-40
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100BX850-40 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 SAIJ100BX850-40
The AirTAC SAIJ100X850-40 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a nominal 850 mm travel with a 40 mm adjustment range, yielding an exact 810-850 mm usable window for fine-tuning the retract end position during commissioning. Equipped with a SUS304 stainless steel rod and PT tapered ports, it delivers 5497 N of push force at 0.7 MPa.
This extruded aluminum barrel design includes sensor grooves on both sides for flexible switch placement. The rear screw acts purely as a mechanical stop to set deceleration and travel limits without requiring external stops, though it does not lock the load without live air pressure. It supports a standard speed range of 30-800 mm/s and uses adjustable air cushions at both ends to manage kinetic energy.
Airtac SAIJ100 Adjustable Cylinder SAIJ100BX850-40 Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100BX850-40 |
|---|---|
| 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 SAIJ100BX850-40
| 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 SAIJ100BX850-40 Is Used
Variable End-Stop Tuning
Dial in the exact retract position within the 810-850 mm window during machine setup to accommodate different product lengths without adding external mechanical stops.
Heavy Forming Positioning
Leverage the 5497 N push force at 0.7 MPa to move heavy tooling, using the rear adjuster to precisely set the bottom-out location for consistent assembly depth.
Line Changeover Actuation
Quickly reconfigure diverter or gating mechanisms on a packaging line by turning the rear screw, adapting the 850 mm stroke to new package formats on the fly.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX850-40 the Right Cylinder?
Select this 100 mm bore when an 80 mm cylinder's 3518 N push force at 0.7 MPa is insufficient, or step down if the 63 mm bore's 2182 N is adequate. The adjustable 810-850 mm window is chosen over a fixed SAI cylinder when a machine requires variable end-stops or product-size changeovers without physically swapping the actuator. Because the stroke is 850 mm, the 25 mm diameter SUS304 rod will still experience leverage forces; an external guide is recommended to prevent excessive side-loading.
For a true ISO 15552 replacement match, verify the 100 mm bore, 850 mm stroke, -40 adjust code, PT port thread, and the required mounting style (Basic, FA, LB, TC, FTC, TCM1, or TCM2). Note that SAIJ omits the FB, CA, CB, and CR mounts. As this model lacks the -S magnet option, it cannot host CMSE reed or DMSE electronic sensors. If the application demands holding the load without continuous air pressure, use an external rod lock or explore the SAIL or BSAI series instead.
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 SAIJ100BX850-40 FAQ
At 0.7 MPa operating pressure, this 100 mm bore cylinder provides 5497 N of push force and 5146 N of pull force. It can achieve a maximum push force of 7068 N at 0.9 MPa.
The rear adjuster screw allows you to trim the effective stroke back by up to 40 mm from the nominal 850 mm, creating an 810-850 mm travel window. It functions as a mechanical stop to fine-tune the end position and does not lock the load when air pressure is removed.
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