Airtac SAIJ40 Adjustable Cylinder SAIJ40BX950-50S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX950-50S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 950mm 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
- Stroke950 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX950-50S
The AirTAC SAIJ40X950-50-S is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a 950 mm nominal stroke that can be dialed back by up to 50 mm, creating a precise 900-950 mm usable travel window for commissioning flexibility. Delivering 628 N of push force at 0.5 MPa, it integrates a SUS304 stainless steel rod for superior corrosion resistance and uses PT tapered port threads.
This model includes a magnet for position sensing, working seamlessly with AirTAC CMSE reed and DMSE solid-state switches mounted in the dual-side sensor grooves. The extruded aluminum barrel maintains a standard ISO 15552 mounting interface, while the rear stopper screw allows fine end-position tuning without adding external stops. The adjuster acts solely as a travel stop and does not hold the load without live air pressure.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX950-50S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX950-50S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 950 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 SAIJ40BX950-50S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×950 | 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 SAIJ40BX950-50S Is Used
Machine Changeover
Dial in the 900-950 mm travel window during product size changes to set new end stops without swapping the physical cylinder.
Long-Stroke Diversion
Fine-tune the exact pusher position on extended 950 mm conveyor routing tasks where minor end-stop variances occur.
Assembly Calibration
Use the rear adjuster to precisely set the retraction end-point during machine commissioning for sensitive 40 mm bore operations.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX950-50S the Right Cylinder?
Choose this 40 mm bore cylinder when an application requires 628 N push force at 0.5 MPa and variable end-positioning. The adjustable 900-950 mm window is ideal for product changeovers, preventing the need to physically swap cylinders for slightly different travel lengths. If your setup demands higher force, stepping up to the 50 mm bore yields 982 N, while dropping to the 32 mm bore provides 402 N.
Because the 950 mm stroke is lengthy, the 16 mm rod and M12x1.25 thread will experience amplified side loads; an external guide is strongly recommended to prevent rod binding. For exact ISO 15552 interchangeability, match the 40 mm bore, 950 mm stroke, 50 mm adjustment, PT ports, and the -S magnet. If your machine requires true load-holding without continuous air pressure, select the SAIL or BSAI series instead, as the SAIJ rear adjuster is a stop, not a 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 SAIJ40 Adjustable Cylinder SAIJ40BX950-50S FAQ
At 0.5 MPa operating pressure, this 40 mm bore cylinder provides 628 N of push force and 528 N of pull force. At the maximum 1.0 MPa pressure, it delivers 1130 N of push force.
The rear adjuster screw allows you to shorten the 950 mm nominal stroke by up to 50 mm, creating a usable travel window of 900 to 950 mm. This stopper only sets the end position; it does not lock or hold the load without live air pressure.
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