Airtac SAIJ40 Adjustable Cylinder SAIJ40BX140-50
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX140-50 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 140mm 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
- Stroke140 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX140-50
The AirTAC SAIJ40X140-50 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a usable travel window of 90 to 140 mm, allowing you to dial back the effective stroke by up to 50 mm during machine setup without swapping out the physical unit. Built with a SUS304 stainless steel rod, it delivers 628 N of push force at 0.5 MPa, making it well-suited for environments requiring high corrosion resistance. The extruded aluminum barrel includes sensor grooves on both sides for straightforward position feedback integration.
This model features PT tapered port threads (G1/4) and variable air cushions at both ends to manage end-of-stroke deceleration. The rear adjuster functions strictly as a mechanical stop to fine-tune the end position; it is not a locking device and will not hold a load without continuous live air pressure. For applications requiring true load-holding safety, exploring the SAIL or BSAI series is recommended.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX140-50 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX140-50 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 140 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 SAIJ40BX140-50
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×140 | 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 SAIJ40BX140-50 Is Used
Machine Changeover
Quickly modify the effective stroke from 90 to 140 mm during product size transitions on a packaging line without replacing the cylinder.
End-Position Tuning
Fine-tune the retract stop during initial commissioning to perfect the resting position of a pick-and-place actuator.
Corrosion-Resistant Automation
Leverage the SUS304 stainless steel rod in manufacturing cells where moisture or light chemicals are present.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX140-50 the Right Cylinder?
Choose this 40 mm bore cylinder when your application requires precise end-position tuning during commissioning or product changeovers, benefiting from the 90-140 mm adjustable travel window instead of a fixed 140 mm SAI stroke. If your process demands higher force, stepping up to the 50 mm bore yields 982 N of push force at 0.5 MPa. Conversely, lighter-duty tasks can utilize the 32 mm bore, which provides 402 N.
As a dimensionally interchangeable ISO 15552 cylinder, this SKU matches standard mounting footprints using a reduced SAIJ accessory set: Basic, FA, LB, TC, FTC, TCM1, and TCM2 (omitting FB, CA, CB, and CR). The 16 mm rod and M12x1.25 thread handle moderate side loads well, though any long unsupported travel still requires an external guide. To replicate this configuration, specify a 40 mm bore, 140 mm stroke, 50 mm adjustment, PT port thread, no magnet, and SUS304 (B) rod material.
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 SAIJ40BX140-50 FAQ
At 0.5 MPa operating pressure, this 40 mm bore cylinder provides 628 N of push force and 528 N of pull force. At the maximum 1.0 MPa pressure, it delivers 128 kgf.
The rear adjuster acts as a mechanical stop that can shorten the 140 mm nominal stroke by up to 50 mm, creating a usable travel window of 90 to 140 mm. It requires live air to operate and does not lock or 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 SAIJ40BX140-50
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.