Airtac SAIJ100 Adjustable Cylinder SAIJ100BX900-50S
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100BX900-50S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø100mm bore and 900mm 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
- Stroke900 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX900-50S
The AirTAC SAIJ100X900-50-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It provides a nominal 900 mm stroke that can be fine-tuned backward by up to 50 mm, yielding an exact usable travel window of 850 to 900 mm. Delivering 3927 N of push force and 3681 N of pull force at 0.5 MPa, it handles heavy-duty motion with a 25 mm piston rod and G1/2 ports.
This variant features a SUS304 stainless steel rod (code B) for superior corrosion resistance and includes a built-in magnet (-S) for position sensing with AirTAC CMSE reed and DMSE electronic switches. The extruded aluminum barrel includes sensor grooves on both sides. It supports a reduced mounting subset of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR configurations.
Airtac SAIJ100 Adjustable Cylinder SAIJ100BX900-50S Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100BX900-50S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø100 mm |
| Stroke | 900 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 SAIJ100BX900-50S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×900 | 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 SAIJ100BX900-50S Is Used
Variable End-Stop Tuning
Dial in the 850 to 900 mm travel window during machine commissioning to perfectly strike a press or forming tool without adding external physical stops.
Product Size Changeovers
Quickly adapt a long-stroke conveyor diverter or pusher to accommodate different product lengths on the fly by adjusting the rear screw up to 50 mm.
Heavy-Duty Positioning
Leverage the 3927 N push force at 0.5 MPa to shift heavy pallets or chassis components into a machining center with precise retract positioning.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX900-50S the Right Cylinder?
Choose this 100 mm bore when a 80 mm bore (2513 N push at 0.5 MPa) lacks the thrust to move your load, but you want to avoid the larger 125 mm size. An adjustable stroke is selected over a fixed SAI cylinder when you need to dial in the exact end-of-travel position during commissioning or product changeovers without swapping the hardware or adding external stops. At 900 mm, the unsupported stroke is highly susceptible to side-loading; an external guide rail is mandatory to prevent rod binding.
For drop-in interchangeability, match the ISO 15552 dimensions, 100 mm bore, 900 mm stroke, 50 mm adjustment range, PT tapered port threads, and the -S magnet. Remember that the rear adjuster acts purely as a mechanical stop to set deceleration, not as a locking device. A plain SAIJ cannot hold a load without live air pressure; for true fail-safe load holding, use an SAIL pneumatic lock, a BSAI clamp-lock, or an external rod lock.
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 SAIJ100BX900-50S FAQ
At 0.5 MPa operating pressure, this 100 mm bore cylinder provides 3927 N of push force and 3681 N of pull force. It can reach up to 7068 N of push force at 0.9 MPa.
The rear adjuster screw lets you shorten the effective travel from the 900 mm nominal stroke down to 850 mm. It acts as a mechanical stop to fine-tune the retract end position and relies on the air cushion for deceleration; it does not lock the load without live air.
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