Airtac SAIJ40 Adjustable Cylinder SAIJ40BX220-20
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX220-20 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 SAIJ40BX220-20
The AirTAC SAIJ40X220-20 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that permits up to 20 mm of end-position tuning. This yields a usable travel window of 200 to 220 mm, enabling precise calibration at commissioning without swapping the cylinder or adding external stops. It delivers 628 N of push force and 528 N of pull force at 0.5 MPa.
Equipped with a SUS304 stainless steel rod, this variant is well-suited for environments where corrosion resistance is a priority. The extruded aluminum barrel includes sensor grooves on both sides, allowing direct mounting of position switches if needed later. It features a G1/4 port and a 30 mm variable air cushion at both ends to manage deceleration.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX220-20 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX220-20 |
|---|---|
| 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 SAIJ40BX220-20
| 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 SAIJ40BX220-20 Is Used
Machine Setup Calibration
Dial in the exact end-of-stroke position during initial commissioning, trimming up to 20 mm to perfect the kinematics without machining external stop blocks.
Product Size Changeover
Quickly adapt a packaging line to different carton lengths by adjusting the retract stop within the 200-220 mm travel window during product transitions.
Stainless Rod Actuation
Leverage the SUS304 stainless steel rod for light-duty positioning tasks in moist or mildly corrosive environments where a standard carbon steel rod would degrade.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX220-20 the Right Cylinder?
Choose this 40 mm bore when an application requires around 628 N of push force at 0.5 MPa, stepping up from a 32 mm bore (402 N) for heavier loads, or down from a 50 mm bore (982 N) to save air volume. The adjustable stroke is ideal for machine setups requiring variable end stops or product-size changeovers. Note that the rear adjuster acts as a travel stop, not a lock; the cylinder will not hold a load without live air pressure. For load-holding requirements, consider the SAIL or BSAI series.
When replacing an ISO 15552 cylinder, match the 40 mm bore, 220 mm nominal stroke, 20 mm adjustment range, PT tapered port thread, and standard mounting interface. The SAIJ supports a reduced mounting set including Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR. With a 220 mm stroke, ensure proper guidance to prevent excessive side-loading on the rod.
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 SAIJ40BX220-20 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 pressure of 1.0 MPa, it delivers 128 kgf.
A rear external screw acts as a mechanical stopper, allowing you to shorten the 220 mm nominal stroke by up to 20 mm, creating a usable travel window of 200 to 220 mm. This adjuster sets the end position but does not lock the load without live air pressure.
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