Airtac SAIJ40 Adjustable Cylinder SAIJ40BX115-40
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX115-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 115mm 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
- Stroke115 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX115-40
The AirTAC SAIJ40X115-40 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to trim the effective travel down by up to 40 mm. This creates a highly flexible 75-115 mm usable stroke window, letting you dial in the exact end position during commissioning without swapping out the physical cylinder. It delivers 628 N of push force and 528 N of pull force at 0.5 MPa, making it well-suited for medium-duty positioning tasks.
This specific configuration features a SUS304 stainless steel rod (code B) for superior corrosion resistance in humid or washdown environments. It uses PT tapered port threads and lacks a piston magnet. The extruded aluminum barrel includes sensor grooves on both sides, and the mounting interface supports a subset of ISO 15552 brackets: Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX115-40 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX115-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 115 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 SAIJ40BX115-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×115 | 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 SAIJ40BX115-40 Is Used
Machine Changeover
Quickly fine-tune the 75-115 mm stroke window during product format changes without physically replacing the cylinder or adding external stopper blocks.
Variable End Stops
Ideal for diverter arms where the rear adjuster sets the exact retraction point to accommodate packages of varying widths on the fly.
Stainless Rod Duty
The SUS304 stainless steel rod provides excellent moisture resistance for light manufacturing environments where carbon steel might corrode.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX115-40 the Right Cylinder?
Select this 40 mm bore when an application requires precise mechanical end-position tuning on the fly, such as accommodating slight product size variations on a conveyor. If your setup needs less force, stepping down to a 32 mm bore yields 402 N of push force at 0.5 MPa; stepping up to a 50 mm bore provides 982 N. Because this model lacks a magnet, position sensing is not possible without modifying the configuration. To match this cylinder for an ISO 15552 replacement, verify the 115 mm stroke, 40 mm adjustment range, PT port threads, and your required mounting bracket.
The rear adjuster functions strictly as a travel stop to set the retraction endpoint and relies on the integrated air cushion to decelerate the load. It does not hold the load in place without continuous air pressure. For applications requiring true load-holding without live air, consider the AirTAC SAIL locking cylinder or an external pilot-operated check valve.
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 SAIJ40BX115-40 FAQ
At 0.5 MPa operating pressure, this 40 mm bore cylinder generates 628 N of push force and 528 N of pull force. At the maximum 1.0 MPa pressure, it can deliver up to 1130 N of push force.
The rear adjuster acts as a mechanical stop that lets you shorten the nominal 115 mm stroke by up to 40 mm. This provides a usable travel window of 75 to 115 mm, allowing you to fine-tune the retraction end position during setup. It is a stop, not a lock, and cannot hold the load without air pressure.
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 SAIJ40BX115-40
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.