Airtac SAIJ40 Adjustable Cylinder SAIJ40BX950-75
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX950-75 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 SAIJ40BX950-75
The AirTAC SAIJ40X950-75 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that permits precise end-position tuning. Its 950 mm nominal stroke can be dialed back by up to 75 mm, creating an exact 875-950 mm usable travel window for commissioning flexibility without external stops. Delivering 628 N of push force at 0.5 MPa, it handles medium-duty positioning with reliable variable air cushions at both ends.
This specific SKU is configured with a SUS304 stainless steel rod for superior corrosion resistance in harsh environments, and uses PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch mounting. Remember that the rear adjuster functions strictly as a travel stop, not a lock; it cannot hold a load without live air pressure.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX950-75 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX950-75 |
|---|---|
| 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 SAIJ40BX950-75
| 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 SAIJ40BX950-75 Is Used
Long-Transfer Diverter
Adjusts the retract stop by up to 75 mm to accommodate varying package lengths on a sorting conveyor without physically moving the cylinder mount.
Machine Commissioning
Dials in the exact 875-950 mm end position during setup to perfectly time a long-travel machine motion, avoiding the need for machined external spacers.
Corrosive Environment Actuation
Leverages the SUS304 stainless steel rod for reliable long-stroke pushing in washdown or chemical exposure areas where standard carbon steel rods would fail.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX950-75 the Right Cylinder?
Choose this 40 mm bore when an application requires 628 N push force at 0.5 MPa (or 879 N at 0.7 MPa) across a long 950 mm travel distance. If your process demands less force, stepping down to a 32 mm bore yields 402 N at 0.5 MPa, while upgrading to a 50 mm bore provides 982 N at 0.5 MPa. The 75 mm adjustment range is ideal for product changeovers on a line, allowing you to fine-tune the retract end without swapping the cylinder. For a fixed end-position without adjustment, a standard SAI cylinder is sufficient. Because the stroke is 950 mm, an external guide is highly recommended to prevent excessive rod side-loading and premature seal wear. To replace this cylinder with another ISO 15552 brand, match the 40 mm bore, 950 mm stroke, 75 mm adjustment, PT G1/4 port, and Basic/FA/LB/TC/FTC/TCM1/TCM2 mounting interface.
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 SAIJ40BX950-75 FAQ
It features a rear adjuster screw that lets you shorten the 950 mm nominal stroke by up to 75 mm, providing a usable travel window of 875 to 950 mm. This allows fine-tuning of the end position during commissioning without replacing the cylinder.
The 40 mm bore generates 628 N of push force and 528 N of pull force at 0.5 MPa, with a maximum push force of 1130 N at 0.9 MPa. It operates at speeds between 30 and 800 mm/s.
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