Airtac SAIJ40 Adjustable Cylinder SAIJ40BX155-50
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX155-50 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 155mm 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
- Stroke155 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX155-50
The AirTAC SAIJ40X155-50 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the end position. With a nominal 155mm stroke and a 50mm adjustment range, it provides a usable travel window of 105 to 155mm. This enables precise end-position tuning at commissioning or during product changeovers without swapping the cylinder or adding external stops. It delivers 879N of push force at 0.7MPa.
This variant uses a SUS304 stainless steel rod (code B) for superior corrosion resistance and features PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides. Note that the rear adjuster acts purely as a travel stop to decelerate the load, not as a lock; for load-holding without live air pressure, consider the SAIL or BSAI series.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX155-50 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX155-50 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 155 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 SAIJ40BX155-50
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×155 | 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 SAIJ40BX155-50 Is Used
Machine Changeover
Dial in the exact 105-155mm travel window during product size changes on a packaging line without physically swapping out the actuator.
Commissioning Tuning
Fine-tune the retract end-position during initial machine setup to absorb mechanical tolerances and achieve precise positioning.
Variable End Stops
Provide a flexible hard stop for testing fixtures that require different retraction distances within the 50mm adjustment band.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX155-50 the Right Cylinder?
Choose this 40mm bore cylinder when an application requires 879N of push force at 0.7MPa. If your process needs less force, stepping down to a 32mm bore yields 563N, while moving up to a 50mm bore provides 1374N. The adjustable stroke is selected over a fixed SAI model when you need a variable end-stop to accommodate multiple product sizes on one line. As a true ISO 15552 profile cylinder, it is dimensionally interchangeable with other ISO 15552 cylinders, utilizing a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2 (omitting FB, CA, CB, and CR).
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 SAIJ40BX155-50 FAQ
The rear adjuster screw lets you shorten the effective stroke by up to 50mm, providing a usable travel window of 105 to 155mm. It acts as a mechanical stop to set the end position and does not hold the load without live air pressure.
At 0.7MPa, the SAIJ40X155-50 provides 879N of push force and 528N of pull force. It operates at speeds between 30 and 800mm/s.
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 SAIJ40BX155-50
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.