Airtac SAIJ100 Adjustable Cylinder SAIJ100BX300-75
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100BX300-75 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø100mm bore and 300mm 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
- Stroke300 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX300-75
The AirTAC SAIJ100X300-75 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster that creates a 225-300mm usable travel window from the 300mm nominal stroke. It delivers 3927N of push force at 0.5 MPa and 7068N at 0.9 MPa, making it a robust choice for heavy pneumatics. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch placement.
This specific SKU is configured with a SUS304 stainless steel rod for superior moisture and corrosion resistance, and PT tapered air ports. The rear adjuster acts purely as a mechanical stop to fine-tune the retract position during commissioning without adding external stops. It does not hold the load without live air pressure, so a SAIL or BSAI lock is required for fail-safe load holding.
Airtac SAIJ100 Adjustable Cylinder SAIJ100BX300-75 Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100BX300-75 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø100 mm |
| Stroke | 300 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 SAIJ100BX300-75
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×300 | 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 SAIJ100BX300-75 Is Used
Product Size Changeovers
Dial the retract distance back by up to 75mm to accommodate a new product length on the conveyor without physically replacing the cylinder.
Commissioning End-Stop Tuning
Fine-tune the exact 225-300mm travel window during machine setup to perfect the seating position of heavy assemblies without external shims.
Heavy Fixture Positioning
Leverage the 3927N push force at 0.5 MPa to shift heavy machining fixtures, using the rear stop to guarantee a consistent retracted home position.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX300-75 the Right Cylinder?
Choose this 100mm bore when a 63mm bore (1559N at 0.5 MPa) is insufficient for moving heavy fixtures, but a 125mm bore is oversized. The 75mm adjustment range is ideal for product-size changeovers on a line, allowing operators to dial in the exact retract distance on the fly rather than swapping out a fixed-stroke SAI cylinder. For a true ISO 15552 replacement match, verify the 300mm stroke, 75mm adjuster, G1/2 port, and the required mounting bracket (Basic, FA, LB, TC, FTC, TCM1, or TCM2).
Because the 300mm stroke is relatively long, the 25mm rod diameter should carry side loads with an external guide rather than relying solely on the cylinder bearings to prevent rod wear. The standard variable air cushions at both ends decelerate the mass, but remember the rear screw stopper only sets the end position; it is not a brake.
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 SAIJ100BX300-75 FAQ
At 0.5 MPa, this 100mm bore cylinder provides 3927N of push force and 3681N of pull force. At 0.9 MPa, the push force increases to 7068N.
The rear adjuster screw allows you to shorten the effective travel from the 300mm nominal stroke down to 225mm. This stopper sets the retract end position during setup but does not lock or hold the load without continuous air pressure.
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