Airtac SAIJ40 Adjustable Cylinder SAIJ40BX115-50
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX115-50 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 SAIJ40BX115-50
The AirTAC SAIJ40X115-50 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to dial back the nominal 115 mm stroke by up to 50 mm. This creates a highly flexible 65-115 mm usable travel window, enabling precise end-position tuning at commissioning or during product changeovers without swapping the actuator or adding external stops. It delivers a robust 628 N push force at 0.5 MPa and 1130 N at 0.9 MPa.
Built with a SUS304 stainless steel rod for enhanced corrosion resistance, this model uses PT tapered ports and incorporates variable air cushions at both ends to manage deceleration. The extruded aluminum barrel includes sensor grooves on both sides for mounting CMSE reed or DMSE electronic sensors if position feedback is later required. It supports a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, deliberately omitting FB, CA, CB, and CR brackets.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX115-50 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX115-50 |
|---|---|
| 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 SAIJ40BX115-50
| 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 SAIJ40BX115-50 Is Used
Machine Changeover
Dial in the exact retract position within the 65-115 mm window during product size or format changes on a packaging line without replacing the cylinder.
Commissioning Fine-Tune
Use the 50 mm rear adjustment screw to precisely set the end-of-stroke stop during initial machine setup, absorbing mechanical tolerances instantly.
Variable End Stop Machining
Adjust the travel distance on the fly for multi-stage machining operations that require different retraction depths without reprogramming the motion controller.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX115-50 the Right Cylinder?
Choose this 40 mm bore adjustable-stroke actuator when your setup requires variable end stops within a 65-115 mm travel range. If your application needs less force, stepping down to the 32 mm bore yields 402 N of push force at 0.5 MPa, whereas stepping up to the 50 mm bore provides 982 N. The SAIJ40X115-50 is selected over a fixed SAI cylinder when machine changeovers demand a mechanically tunable retract position rather than a rigid stroke.
As an ISO 15552 profile cylinder, it is dimensionally interchangeable with other ISO 15552 cylinders such as SMC or Festo equivalents, matching the 40 mm bore, 115 mm stroke, 50 mm adjustment, PT ports, and the specified mounting interface. Note that the rear adjuster acts only as a travel stop and does not hold the load without live air; for true fail-safe load holding, consider an SAIL or BSAI cylinder. Because the 115 mm stroke is relatively short, side-loading risks are minimal, but external guides are always recommended for heavy lateral loads.
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 SAIJ40BX115-50 FAQ
The SAIJ40X115-50 cylinder generates 628 N of push force and 528 N of pull force at 0.5 MPa, scaling up to 1130 N push force at 0.9 MPa.
The rear adjuster screw lets you shorten the nominal 115 mm stroke by up to 50 mm, providing an adjustable usable travel window between 65 mm and 115 mm. The adjuster acts as a mechanical stop and does not lock 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 SAIJ40BX115-50
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.