Airtac SAIJ40 Adjustable Cylinder SAIJ40BX950-10S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX950-10S 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 SAIJ40BX950-10S
The AirTAC SAIJ40X950-10-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, enabling you to dial back the effective travel by up to 10 mm. This yields a precise 940-950 mm usable stroke window, perfect for fine-tuning end positions without adding external stops. It delivers 879 N of pull force at 0.7 MPa and operates at speeds of 30-800 mm/s.
This unit features a SUS304 stainless steel rod (option B) for superior corrosion resistance and a PT tapered port thread. The extruded aluminum barrel includes sensor grooves on both sides, and the integrated magnet (-S) supports AirTAC CMSE reed and DMSE electronic solid-state switches for exact position feedback.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX950-10S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX950-10S |
|---|---|
| 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 SAIJ40BX950-10S
| 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 SAIJ40BX950-10S Is Used
Long-Stroke End Tuning
Dial in the exact 940-950 mm retract position on lengthy material handling lines during initial setup without machining external stopper blocks.
Product Size Changeover
Quickly adapt the travel limit by up to 10 mm on packaging conveyors when switching between slightly different product lengths.
Corrosive Assembly Lines
Leverage the SUS304 stainless steel rod for reliable actuation in washdown or mildly corrosive manufacturing environments.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX950-10S the Right Cylinder?
Choose this 40 mm bore when a 32 mm bore (offering 345 N pull at 0.7 MPa) lacks the necessary force, but a 50 mm bore (825 N pull) is oversized. The adjustable stroke is selected over a fixed SAI cylinder when you need to fine-tune the retract end during machine commissioning or product changeover. Because the 950 mm stroke is long, an external guide is highly recommended to prevent excessive side-loading on the rod.
For ISO 15552 replacement matching, specify: 40 mm bore, 950 mm stroke, 10 mm adjustment, PT port, and a magnet for sensors. Note that the rear adjuster acts only as a travel stop and does not hold the load without live air; for true load-holding without pressure, consider an AirTAC SAIL or BSAI cylinder. SAIJ supports a reduced mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2) and omits FB, CA, CB, and CR brackets.
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 SAIJ40BX950-10S FAQ
At a 0.7 MPa operating pressure, this 40 mm bore double-acting cylinder provides 879 N of push force and 828 N of pull force due to the rod area.
A rear external stopper screw lets you shorten the 950 mm nominal stroke by up to 10 mm, creating a 940-950 mm travel window. It acts as a physical stop and does not lock the load without air pressure.
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