Airtac SAIJ40 Adjustable Cylinder SAIJ40BX220-40
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX220-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 220mm 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
- Stroke220 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX220-40
The AirTAC SAIJ40X220-40 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that trims the nominal 220 mm travel back by up to 40 mm, yielding a precise 180-220 mm usable window. This built-in stopper allows you to fine-tune the retract end-position during commissioning without swapping out the cylinder or adding external stops. It delivers 879 N of push force at 0.7 MPa and uses a G1/4 port.
This variant is configured with a SUS304 stainless steel rod for superior corrosion resistance, and because it lacks a magnet, it does not carry position sensors. The extruded aluminum barrel incorporates sensor grooves on both sides for standard ISO 15552 mounting. The rear adjuster acts purely as a travel stop to set deceleration, not as a lock, so it will not hold a load without live air pressure.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX220-40 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX220-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 220 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 SAIJ40BX220-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×220 | 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 SAIJ40BX220-40 Is Used
Machine Setup Tuning
Dial in the exact 180-220 mm retract position during initial commissioning to perfectly align a pressing or clamping jaw without machining custom spacers.
Product Changeover
Quickly adjust the end-stop by up to 40 mm on a packaging line when switching to a different carton size, reducing downtime between production runs.
Variable End-Stop Assembly
Use the rear adjuster to accommodate multiple part lengths on a single fixture, letting the cylinder operate safely across a slightly shorter travel window.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX220-40 the Right Cylinder?
Selecting this 40 mm bore over a 32 mm version steps the thrust up from 563 N to 879 N at 0.7 MPa, while a 50 mm bore would push 1374 N if your pneumatic system requires more power. An adjustable stroke is chosen over a fixed SAI cylinder when you need variable end-stops for product changeovers or setup tuning. If you need to hold the load mechanically without continuous air pressure, consider the SAIL or BSAI locking cylinders instead.
For a drop-in ISO 15552 replacement match, specify a 40 mm bore, 220 mm stroke, 40 mm adjustment range, PT tapered port thread, SUS304 (B) rod material, no magnet, and a mounting choice from the SAIJ subset: Basic, FA, LB, TC, FTC, TCM1, or TCM2. Since the 220 mm stroke exceeds 300 mm, an external guide is not strictly mandated, but ensuring the 16 mm rod and M12x1.25 thread are not subjected to high side loads will maximize seal life.
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 SAIJ40BX220-40 FAQ
The rear adjuster acts as an external stopper that lets you shorten the effective stroke by up to 40 mm, creating a 180-220 mm usable travel window. It sets the end position and deceleration point but does not lock or hold the load without live air pressure.
At 0.7 MPa operating pressure, this 40 mm bore cylinder provides 879 N of push force and 740 N of pull force. It can deliver up to 1130 N push force at its maximum 0.9 MPa pressure.
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