Airtac SAIJ40 Adjustable Cylinder SAIJ40BX200-30S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX200-30S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 200mm 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
- Stroke200 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX200-30S
The AirTAC SAIJ40X200-30-S is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a 170-200 mm usable travel window, allowing you to dial back the 200 mm nominal stroke by up to 30 mm during machine commissioning. Delivering 879 N of push force at 0.7 MPa, it is built with a SUS304 stainless steel rod for superior corrosion resistance and features dual-side sensor grooves compatible with CMSE reed and DMSE electronic switches.
This model uses a PT tapered port thread and includes adjustable air cushions at both ends to manage end-of-stroke impacts. The external adjuster acts solely as a mechanical stop to fine-tune the retract position without adding external stops; it does not lock the load or hold position without live air pressure. Mounting options include the reduced SAIJ set: Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX200-30S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX200-30S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 200 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 SAIJ40BX200-30S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×200 | 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 SAIJ40BX200-30S Is Used
Machine Changeover
Quickly fine-tune the 170-200 mm retract position during product size changes on a packaging line without swapping out the entire cylinder.
End-Stop Calibration
Dial in the exact end-of-stroke position during machine commissioning using the 30 mm rear adjuster, avoiding the need to bolt on external mechanical stops.
Corrosive Assembly Lines
Leverage the SUS304 stainless steel rod and 879 N push force for reliable actuation in washdown or mildly corrosive industrial assembly environments.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX200-30S the Right Cylinder?
Choose this 40 mm bore when an application requires 879 N of push force at 0.7 MPa and on-the-fly end-position tuning. If you need less force, stepping down to a 32 mm bore yields 563 N, while stepping up to a 50 mm bore provides 1374 N. The adjustable stroke is ideal for product changeovers where the exact retract distance varies, eliminating the need to physically swap a fixed-stroke SAI cylinder.
For load-holding without continuous air pressure, this cylinder is not suitable; you should select an SAIL or BSAI model instead. When replacing an ISO 15552 cylinder, match the 40 mm bore, 200 mm stroke, 30 mm adjustment, PT port, and the -S magnet. The 16 mm rod and M12x1.25 thread handle standard side loads well, but for any stroke over 300 mm, an external guide is recommended to prevent rod deflection.
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 SAIJ40BX200-30S FAQ
At 0.7 MPa, this 40 mm bore cylinder provides 879 N of push force and 528 N of pull force. It operates at speeds between 30 and 800 mm/s.
The rear adjuster acts as a mechanical stop that lets you shorten the 200 mm nominal stroke by up to 30 mm, creating a 170-200 mm usable travel window. It only sets the end position; it does not lock or hold the load without live air pressure.
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