Airtac SAIJ40 Adjustable Cylinder SAIJ40BX140-100
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX140-100 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 SAIJ40BX140-100
The AirTAC SAIJ40X140-100 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a broad usable travel window from 40 to 140 mm, allowing you to dial in the exact retract position during commissioning without swapping hardware. Built with a SUS304 stainless steel rod, it delivers 628 N of push force at 0.5 MPa and uses a PT tapered port thread.
Equipped with variable air cushions at both ends, this 40 mm bore unit operates at speeds between 30 and 800 mm/s. The rear stopper screw acts purely as a travel end-deceleration point, not a load lock, so live air pressure must be maintained to hold a load. It supports a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX140-100 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX140-100 |
|---|---|
| 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 SAIJ40BX140-100
| 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 SAIJ40BX140-100 Is Used
Product Changeover
Quickly adapt retract distances on packaging lines handling varying container sizes, using the 100 mm window to switch stops without changing cylinders.
Commissioning Calibration
Fine-tune the exact end position during machine setup, trimming the stroke back from 140 mm to perfectly meet the workpiece without adding external stops.
Variable End Positioning
Dial in the precise retract point for clamping or pressing tasks where the material thickness fluctuates, relying on the SUS304 rod for durability.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX140-100 the Right Cylinder?
Choose this 40 mm bore cylinder when an application requires a highly variable retract end-stop, as the 100 mm adjustment window allows massive flexibility for product changeovers. If you need less fine-tuning range, a fixed-stroke SAI saves setup time. At 0.5 MPa, this bore yields 628 N push and 528 N pull force; stepping up to a 50 mm bore increases push force to 982 N if your payload demands it. For load-holding without continuous air pressure, select a SAIL or BSAI cylinder instead of relying on the adjuster.
To match this exact ISO 15552 footprint, specify a 40 mm bore, 140 mm nominal stroke, PT port thread, SUS304 rod material, and up to 100 mm of adjustment. Since the nominal stroke is under 300 mm, side-load stress on the 16 mm rod is minimal, though external guides are still 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 SAIJ40BX140-100 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 0.7 MPa, the push force increases to 879 N.
The rear adjuster screw lets you shorten the effective stroke by up to 100 mm, creating a usable travel window between 40 and 140 mm. It functions as a mechanical stop to set the end position and does not lock the load without live air.
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