Airtac SAIJ40 Adjustable Cylinder SAIJ40BX275-40
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX275-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 275mm 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
- Stroke275 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX275-40
The AirTAC SAIJ40X275-40 is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a usable travel window of 235 to 275 mm, allowing you to dial back the nominal stroke by up to 40 mm during commissioning. Delivering 628 N of push force at 0.5 MPa, it bridges the gap between compact 32 mm bores and heavier 50 mm units.
This variant uses a SUS304 stainless steel rod for superior corrosion resistance and is fitted with PT tapered ports. The extruded aluminum barrel includes sensor grooves on both sides for direct mounting of CMSE reed or DMSE electronic solid-state switches. The rear stopper acts purely as a travel end-deceleration device, meaning it will not hold a load without live air pressure.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX275-40 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX275-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 275 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 SAIJ40BX275-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×275 | 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 SAIJ40BX275-40 Is Used
Machine Changeover
Dial in the 235-275 mm retract position precisely when switching product sizes on a packaging line, avoiding physical stop replacement.
Assembly Calibration
Fine-tune the end-of-stroke position during commissioning to perfect part seating or pressing depth without machining new fixtures.
Diversion Gates
Adjust the actuation reach on the fly to handle varying package widths on a conveyor system without changing the cylinder setup.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX275-40 the Right Cylinder?
Selecting this 40 mm bore makes sense when your application needs 628 N push force (528 N pull) at 0.5 MPa, stepping up from the 402 N capacity of a 32 mm bore without jumping to the larger 982 N of a 50 mm unit. The 40 mm adjustment range is ideal for product changeovers, letting you set a new retract end-stop without swapping the cylinder or adding external mechanical stops. For load-holding without continuous air pressure, skip this model and look at the SAIL or BSAI series. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2. Because the 275 mm stroke is over 300 mm, ensure you use an external guide to prevent rod side-load damage.
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 SAIJ40BX275-40 FAQ
At a 0.5 MPa operating pressure, this 40 mm bore cylinder provides 628 N of push force and 528 N of pull force. It can reach up to 1130 N push force at 0.9 MPa.
The rear adjuster screw lets you shorten the effective stroke by up to 40 mm, creating a 235 to 275 mm travel window. It functions as a travel stop for end-position tuning, not as a lock, and requires live air to hold the load.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Request a Quote for Airtac SAIJ40 Adjustable Cylinder SAIJ40BX275-40
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.