Airtac SAIJ40 Adjustable Cylinder SAIJ40BX105-50
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX105-50 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 105mm 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
- Stroke105 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX105-50
The AirTAC SAIJ40X105-50 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a usable travel window of 55 to 105 mm, allowing you to dial back the nominal stroke by up to 50 mm during commissioning. In this configuration, the piston rod is constructed from SUS304 stainless steel (code B), and the fluid ports use PT tapered threads, ensuring robust performance in demanding environments.
Delivering 879 N of push force at 0.7 MPa, this cylinder shares the standard ISO 15552 mounting interface. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch placement. The rear stopper mechanism acts solely as a travel end-setter, meaning it does not hold the load pneumatically without live air pressure.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX105-50 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX105-50 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 105 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 SAIJ40BX105-50
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×105 | 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 SAIJ40BX105-50 Is Used
Machine Changeover
Fine-tune the 55-105 mm travel window during product line changeovers to accommodate varying package sizes without replacing hardware.
End-Position Trimming
Dial in the exact retract position during machine commissioning to correct for mechanical tolerances without adding external stops.
Variable Diverter Stops
Adjust the stroke length on the fly for conveyor diverter arms that must handle differently sized items on the same line.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX105-50 the Right Cylinder?
Choose this adjustable-stroke model when your machine setup requires variable end-stops or frequent product-size changeovers, eliminating the need to physically swap out a fixed-stroke SAI cylinder. If your application demands less thrust, stepping down to a bore 32 unit yields 563 N at 0.7 MPa. For higher force requirements, a bore 50 cylinder provides 1374 N.
To replace an ISO 15552 cylinder, match the 40 mm bore, 105 mm stroke, 50 mm adjustment range, PT port thread, and standard mounting interface. SAIJ supports a reduced mounting set including Basic, FA, LB, TC, FTC, TCM1, and TCM2. For applications requiring position holding without live air pressure, consider the SAIL or BSAI series instead, as this adjuster is not a locking mechanism.
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 SAIJ40BX105-50 FAQ
The rear adjuster allows you to shorten the effective stroke by up to 50 mm, creating a usable travel window between 55 and 105 mm. It acts as a mechanical stop and does not function as a lock to hold the load without air pressure.
At 0.5 MPa, it provides 628 N of push force and 528 N of pull force. At 0.7 MPa, the push force increases to 879 N. The rod is made of SUS304 stainless steel with PT tapered ports.
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