Airtac SAIJ40 Adjustable Cylinder SAIJ40BX950-100
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX950-100 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 SAIJ40BX950-100
The AirTAC SAIJ40X950-100 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the effective travel. With a 950 mm nominal stroke and a 100 mm adjustment range, you can dial back the end position to anywhere within an 850 to 950 mm usable window during commissioning. This bore delivers 879 N of push force at 0.7 MPa.
Built with a SUS304 stainless steel rod and PT tapered port threads, it is designed for demanding environments. The extruded aluminum barrel includes sensor grooves on both sides, though this specific SKU is configured without a magnet, meaning external solid-state DMSE or reed CMSE switches cannot be used without modification.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX950-100 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX950-100 |
|---|---|
| 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 SAIJ40BX950-100
| 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 SAIJ40BX950-100 Is Used
Variable End Stops
Dial in the exact clamping position on long-travel fixtures by adjusting the rear stopper from 850 to 950 mm without swapping cylinders.
Product-Size Changeover
Quickly adapt a conveyor sorting or pusher mechanism to handle different package lengths by trimming the retract stroke up to 100 mm.
Machine Setup Fine-Tuning
Eliminate mechanical shims during commissioning by using the integrated rear screw to perfectly time a 950 mm transfer motion.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX950-100 the Right Cylinder?
Choose this 40 mm bore when an application requires a long 950 mm stroke but demands exact end-position tuning without adding external stops. If you need less force, stepping down to a 32 mm bore yields 563 N of push force at 0.7 MPa. If your machine requires more clamping power, a 50 mm bore provides 1374 N. Because the stroke is 950 mm, an external guide is highly recommended to prevent excessive side-load on the rod.
The rear adjuster acts strictly as a mechanical stop to set the travel end and deceleration point; it does not lock or hold the load without live air pressure. For true fail-safe load holding, consider the SAIL or BSAI series. This SAIJ model uses a reduced mounting set including Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting the FB, CA, CB, and CR options.
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 SAIJ40BX950-100 FAQ
The rear adjuster acts as a mechanical stop that lets you shorten the 950 mm nominal stroke by up to 100 mm, providing a usable travel window of 850 to 950 mm for fine-tuning the end position.
At an operating pressure of 0.7 MPa, the SAIJ40X950-100 delivers 879 N of push force and 528 N of pull force. The maximum theoretical force at 1.0 MPa is 128 kgf.
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