Airtac SAIJ40 Adjustable Cylinder SAIJ40BX900-100
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX900-100 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 900mm stroke, G1/4 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ40 mm
- Stroke900 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX900-100
The AirTAC SAIJ40X900-100 is a double-acting ISO 15552 profile cylinder featuring a 900 mm nominal stroke and a rear-mounted adjuster screw that allows you to dial back the effective travel by up to 100 mm. This creates a highly flexible 800-900 mm usable stroke window, letting you fine-tune the retract end-position at commissioning without adding external stops. It delivers 628 N of push force and 528 N of pull force at 0.5 MPa, reaching 1130 N push at 0.9 MPa.
Built with an SUS304 stainless steel rod (code B) for superior corrosion resistance, this 40 mm bore cylinder uses a PT tapered G1/4 port. The extruded aluminum barrel integrates sensor grooves on both sides for CMSE reed or DMSE electronic switches (requires a magnet). It supports a speed range of 30-800 mm/s and uses variable air cushions at both ends to decelerate the load smoothly.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX900-100 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX900-100 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 900 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M12×1.25 |
| 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, 30 mm |
| Max stroke | Up to 1200 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 (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ40 Adjustable Cylinder SAIJ40BX900-100
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | 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 SAIJ40 Adjustable Cylinder SAIJ40BX900-100 Is Used
Variable End-Stop Machining
Dial in the exact 800-900 mm retract position during machine setup to accommodate different workpiece lengths without swapping out the entire cylinder.
Product Changeover Rejectors
Quickly adjust the stroke distance on a packaging line to handle varying box sizes, ensuring precise push-off force at 0.5 MPa.
Commissioning Fine-Tuning
Use the 100 mm rear adjustment window to safely test machine kinematics, preventing hard crashes by limiting the travel before final lock-down.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX900-100 the Right Cylinder?
Choose this 40 mm bore model when your application requires 628 N of push force at 0.5 MPa and a specific travel distance between 800 and 900 mm. If you need less force, the 32 mm bore offers 402 N; if your load requires more, stepping up to the 50 mm bore provides 982 N. The 100 mm adjustment range is ideal for product changeovers or variable end-stop setups, whereas a fixed SAI cylinder is better for static, unchanging lines.
Because the stroke is 900 mm, the unsupported piston rod is highly susceptible to side-loading; an external guide rail is strongly recommended to prevent premature seal wear. Note that the rear adjuster and air cushions only decelerate the load—they do not hold position without live air. For true load-holding, use an external pilot-operated check valve or explore the SAIL or BSAI series. This cylinder is dimensionally interchangeable per ISO 15552 and uses a reduced mounting set: Basic, FA, LB, TC, FTC, TCM1, and TCM2 (omitting FB, CA, CB, and CR).
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 SAIJ40 Adjustable Cylinder SAIJ40BX900-100 FAQ
At 0.5 MPa, this 40 mm bore cylinder provides 628 N of push force and 528 N of pull force. At 0.9 MPa, the push force reaches 1130 N. The operational speed range is 30-800 mm/s.
The rear adjuster screw acts as a mechanical stop that lets you shorten the 900 mm nominal stroke by up to 100 mm, creating a usable travel window of 800-900 mm. It sets the end position but does not lock the load without continuous air pressure.
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