Airtac SAIJ40 Adjustable Cylinder SAIJ40BX160-50S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX160-50S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 160mm 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
- Stroke160 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX160-50S
The AirTAC SAIJ40X160-50-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It provides a nominal 160 mm stroke that can be dialed back by up to 50 mm, creating a precise 110-160 mm usable travel window for product changeovers without swapping hardware. Built with a SUS304 stainless steel rod, it delivers 879 N of push force at 0.7 MPa and uses a PT G1/4 port.
This adjustable-stop design allows fine end-position tuning at commissioning, eliminating the need for external stops. The extruded aluminum barrel features sensor grooves on both sides, and the integrated magnet (-S) directly supports AirTAC CMSE reed and DMSE electronic solid-state switches for exact position feedback.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX160-50S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX160-50S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 160 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 SAIJ40BX160-50S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×160 | 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 SAIJ40BX160-50S Is Used
Product Changeovers
Dial in the 110-160 mm travel window on packaging lines to accommodate different carton sizes without changing out the cylinder.
Machine Setup
Fine-tune the retract end-position during initial commissioning to achieve exact seating forces without machining external spacers.
Variable End Stops
Adjust the stroke on diverter gates to handle varying product lengths on the fly while maintaining a standard ISO 15552 footprint.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX160-50S the Right Cylinder?
Select this 40 mm bore when an application requires 879 N push force at 0.7 MPa with variable end-stops; step down to a 32 mm bore (563 N push at 0.7 MPa) for lighter loads, or up to a 50 mm bore (1374 N push) when higher thrust is needed. Choose the SAIJ adjustable-stroke format over a fixed SAI cylinder when you need on-the-fly end-position tuning during machine setup. To replace an ISO 15552 cylinder, match the 40 mm bore, 160 mm stroke, 50 mm adjustment, PT G1/4 port, and -S magnet.
Because the nominal stroke is 160 mm, side-load risks are moderate, but always ensure proper external guiding for optimal seal life. Remember that the rear adjuster is a travel stop, not a lock; the SAIJ cannot hold a load without live air. For true load-holding without pressure, consider an AirTAC SAIL or BSAI cylinder. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2.
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 SAIJ40BX160-50S FAQ
At 0.7 MPa operating pressure, this 40 mm bore cylinder provides 879 N of push force and 737 N of pull force. It can reach a maximum push force of 1130 N at 0.9 MPa.
The rear adjuster acts as an external stop that lets you shorten the 160 mm nominal stroke by up to 50 mm, providing an effective travel range of 110-160 mm. It sets the end position but does not lock the load without continuous air pressure.
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