Airtac SAIJ100 Adjustable Cylinder SAIJ100BX400-75S
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100BX400-75S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø100mm bore and 400mm 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
- Stroke400 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX400-75S
The AirTAC SAIJ100X400-75-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a 325-400 mm usable travel window, allowing you to dial back the 400 mm nominal stroke by up to 75 mm during commissioning. This bore delivers 5497 N of push force at 0.7 MPa, making it robust for heavy actuation. The B-code rod is SUS304 stainless steel, and the -S magnet enables position sensing via CMSE reed or DMSE solid-state switches.
The external adjusting screw acts solely as a travel stop to fine-tune the end position without adding external stops or swapping cylinders. It is not a lock; the cylinder cannot hold loads without live air. SAIJ uses a reduced mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2), omitting FB, CA, CB, and CR options found on other series.
Airtac SAIJ100 Adjustable Cylinder SAIJ100BX400-75S Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100BX400-75S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø100 mm |
| Stroke | 400 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 SAIJ100BX400-75S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×400 | 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 SAIJ100BX400-75S Is Used
Machine Setup & Changeover
Fine-tune the 325-400 mm travel window during machine commissioning to dial in exact end positions for new product runs without swapping cylinders.
Variable End-Stop Actuation
Adjust the rear stopper up to 75 mm to accommodate different package sizes on a sorting line, providing flexible end-position control.
Heavy-Duty Positioning
Leverage 5497 N of push force at 0.7 MPa to move heavy pallets or fixtures, using the rear screw to trim the final resting position.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX400-75S the Right Cylinder?
Choose this 100 mm bore when 80 mm (3518 N push at 0.5 MPa) is insufficient or 125 mm (6136 N push at 0.5 MPa) is oversized. The 75 mm adjustment window is ideal for product changeovers on a line, letting you set variable end-stops on the fly. For load-holding without continuous air pressure, select SAIL or BSAI instead, as the SAIJ adjuster only decelerates travel. This 400 mm stroke is standard for this bore.
Because this model has a 400 mm stroke, the 25 mm rod and M20x1.5 thread carry substantial side loads, but long unsupported strokes still require an external guide to prevent binding. This SKU includes a -S magnet and PT tapered ports (G1/2). When replacing an ISO 15552 cylinder, match the 100 mm bore, 400 mm stroke, 75 mm adjustment, PT port, and mounting style.
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 SAIJ100BX400-75S FAQ
At 0.7 MPa operating pressure, this 100 mm bore cylinder provides 5497 N of push force and 5497 N of pull force. At 0.5 MPa, it delivers 3927 N push and 3681 N pull.
The rear adjuster screw lets you shorten the 400 mm nominal stroke by up to 75 mm, creating a 325-400 mm usable travel window. The adjuster acts as a mechanical stop to fine-tune end positions and is not a lock.
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