Airtac SAIJ40 Adjustable Cylinder SAIJ40BX210-100S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX210-100S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 210mm 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
- Stroke210 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX210-100S
The AirTAC SAIJ40X210-100-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, providing a usable travel window of 110 to 210 mm. Fitted with a SUS304 stainless steel rod and a position-sensing magnet, it delivers 879 N of push force at 0.7 MPa. The PT tapered port threads ensure a tight, leak-free pneumatic connection.
This model utilizes an extruded aluminum barrel with sensor grooves on both sides for direct mounting of CMSE reed or DMSE electronic switches. The rear adjustment screw acts purely as a travel stop to decelerate the load, meaning it cannot hold a load without live air pressure. For load-holding requirements, consider the SAIL or BSAI series instead.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX210-100S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX210-100S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 210 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 SAIJ40BX210-100S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×210 | 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 SAIJ40BX210-100S Is Used
Machine Changeover
Dial in the exact retract position on the fly when switching between product sizes, using the 110-210 mm window to avoid adding external stops.
End-Position Tuning
Fine-tune the final deceleration point at commissioning using the rear adjuster, avoiding the need to machine custom spacers or swap cylinders.
Variable Assembly Stops
Set precise stroke endpoints for multi-variant assembly lines where the rear stopper must adapt to different part lengths quickly.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX210-100S the Right Cylinder?
Choose this adjustable-stroke cylinder when your application requires frequent product changeovers or fine-tuning of the retract end position without swapping the physical cylinder. If you need less force, stepping down to a bore 32 unit provides 563 N of push force at 0.7 MPa. If your machine needs higher thrust, a bore 50 model offers 1374 N.
To replace this unit with another ISO 15552 cylinder, match the 40 mm bore, 210 mm nominal stroke, 100 mm adjustment range, PT G1/4 port, and the -S magnet option. Since the 210 mm stroke approaches the mid-range of supported travel, ensure your mounting setup handles side loads; for strokes of 300 mm or longer, an external guide is strictly recommended to prevent rod wear.
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 SAIJ40BX210-100S FAQ
At an operating pressure of 0.7 MPa, this 40 mm bore cylinder provides 879 N of push force and 528 N of pull force. The maximum thrust is 128 kgf at 1.0 MPa.
The rear adjuster screw lets you mechanically shorten the effective stroke from 210 mm down to 110 mm. It functions as a travel stop and deceleration device, but it does not lock or hold the load without continuous air pressure.
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