Airtac SAIJ100 Adjustable Cylinder SAIJ100BX850-30
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100BX850-30 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 SAIJ100BX850-30
The AirTAC SAIJ100X850-30 is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It provides a nominal 850 mm stroke that can be fine-tuned down by up to 30 mm, giving operators an exact 820-850 mm usable travel window. In the 100 mm bore class, it delivers substantial thrust—up to 7068 N of push force at 0.9 MPa—making it suitable for heavy-duty positioning tasks.
This unit features a SUS304 stainless steel rod (option B) for superior corrosion resistance and features PT tapered port threads (G1/2). The extruded aluminum barrel includes sensor grooves on both sides, allowing for the direct mounting of CMSE reed or DMSE electronic solid-state switches if a magnet is added later. The rear adjuster functions strictly as a travel stop to set the end position, not as a lock to hold the load without live air pressure.
Airtac SAIJ100 Adjustable Cylinder SAIJ100BX850-30 Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100BX850-30 |
|---|---|
| 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 SAIJ100BX850-30
| 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 SAIJ100BX850-30 Is Used
Product Size Changeovers
Dial in the 820-850 mm end-stop during format changeovers on a packaging line, using the rear screw to accommodate different carton lengths without changing the cylinder.
Heavy Material Pushing
Leverage the 7068 N push force at 0.9 MPa to shift heavy pallets or workpieces, relying on the robust 25 mm rod to handle the demanding transfer loads.
Commissioning Fine-Tuning
Precisely trim the retract position by up to 30 mm during machine commissioning to perfectly align a heavy tooling fixture without adding external mechanical stops.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX850-30 the Right Cylinder?
Selecting this 100 mm bore cylinder makes sense when your application requires the 5497 N push force at 0.7 MPa that this size provides, stepping up from a 63 mm bore that only offers 2182 N. The adjustable 820-850 mm travel window is ideal for machine setups requiring commissioning fine-tuning or product-size changeovers without physically swapping out a fixed-stroke SAI cylinder. To replace an existing ISO 15552 unit, match the 100 mm bore, 850 mm stroke, PT port threads, and your required mounting kit.
Because the stroke is 850 mm, the M20x1.5 rod will experience leverage forces under side loading; an external guide mechanism is strongly recommended to prevent premature seal wear. For applications needing the load to be held mechanically without continuous air pressure, a standard SAIJ will not suffice—you should look toward an SAIL air-released lock, a BSAI clamp-lock cylinder, or an external rod lock. Mounting options for this series include Basic, FA, LB, TC, FTC, TCM1, and TCM2.
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 SAIJ100BX850-30 FAQ
At 0.5 MPa it provides 3927 N of push force and 3681 N of pull force. At 0.9 MPa, the push force increases to 7068 N. The maximum allowable operating pressure is 1.0 MPa.
The rear adjuster acts as a mechanical stop that lets you shorten the 850 mm nominal stroke by up to 30 mm, creating an effective 820-850 mm travel window. It only sets the end position and does not lock the load without live air pressure.
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