Airtac SAIJ40 Adjustable Cylinder SAIJ40BX100-20S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX100-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 100mm 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
- Stroke100 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX100-20S
The AirTAC SAIJ40X100-20-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to dial back the travel by up to 20 mm, creating an 80-100 mm usable stroke window for precise commissioning. It delivers 628 N of push force and 528 N of pull force at 0.5 MPa, making it well-suited for medium-duty positioning tasks.
This specific SKU is configured with a SUS304 stainless steel rod (code B) for superior corrosion resistance and features a built-in magnet (-S) for use with CMSE reed and DMSE electronic solid-state sensors. The extruded aluminum barrel includes sensor grooves on both sides, and the PT tapered ports match the standard G1/4 thread size for this 40 mm bore.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX100-20S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX100-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 100 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 SAIJ40BX100-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×100 | 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 SAIJ40BX100-20S Is Used
Changeover Calibration
Fine-tune the 80-100 mm travel window during product size changeovers on a packaging line without disassembling the cylinder.
Variable End Stops
Set precise retract positions for machining operations where the rear stopper dials in the exact end-of-stroke location.
Assembly Station Setup
Commission new assembly stations quickly by adjusting the 20 mm stroke buffer to accommodate varying part dimensions.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX100-20S the Right Cylinder?
Choose this 40 mm bore cylinder when your application requires 628 N of push force at 0.5 MPa, stepping up from a 32 mm bore (402 N) for heavier payloads, or down from a 50 mm bore (982 N) to save space and air volume. The adjustable stroke is ideal for machine setups requiring fine end-position tuning during product changeovers without swapping out the physical cylinder or adding external stops.
For any mounting requirements, note that SAIJ supports a reduced set of ISO 15552 interfaces: Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR. If your process requires the load to be held in place without live air pressure, be aware that the rear adjuster is strictly a travel stop and not a locking device; you would need to specify an SAIL or BSAI cylinder instead. To match this cylinder exactly for an ISO 15552 replacement, use: 40 mm bore, 100 mm stroke, 20 mm adjustment, PT port, your chosen mounting, and the -S magnet.
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 SAIJ40BX100-20S FAQ
The rear adjuster acts as an external stopper that lets you shorten the effective stroke by up to 20 mm. For this 100 mm nominal stroke cylinder, it provides an adjustable travel window of 80-100 mm, allowing precise end-position tuning at commissioning without replacing the cylinder.
At an operating pressure of 0.5 MPa, the SAIJ40X100-20-S generates 628 N of push force and 528 N of pull force. It can reach up to 1130 N of push force at 0.9 MPa.
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