Airtac SAIJ100 Adjustable Cylinder SAIJ100BX40-20
The AirTAC SAIJ100 Adjustable Cylinder SAIJ100BX40-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø100mm bore and 40mm stroke, G1/2 air ports and adjustable end cushioning. Its standardized mounting interface makes it interchangeable with other ISO 15552 cylinders at the mounting interface.
- BoreØ100 mm
- Stroke40 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX40-20
The AirTAC SAIJ100X40-20 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the end position without adding external stops. With a 40 mm nominal stroke and a 20 mm adjustment range, it provides a highly versatile 20 to 40 mm usable travel window for dialing in exact retraction points during commissioning.
This SKU is configured with a SUS304 stainless steel rod (code B) for superior corrosion resistance and features PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides, though this specific unit is supplied without a magnet. It supports a speed range of 30-800 mm/s and uses the standard SAIJ mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2), omitting FB, CA, CB, and CR options.
Airtac SAIJ100 Adjustable Cylinder SAIJ100BX40-20 Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100BX40-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø100 mm |
| Stroke | 40 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| Rod thread | M20×1.5 |
| 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, 36 mm |
| Max stroke | Up to 1500 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 (Ø100mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3682 N | 3682 N |
| 0.7 MPa | 5154 N | — |
| Max (@1.0 MPa) | 751 kgf | |
Double-rod model: the rod passes through the rear cover, so both piston faces lose rod area and push is shown at the annular-area value. Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ100 Adjustable Cylinder SAIJ100BX40-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×40 | 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 SAIJ100 Adjustable Cylinder SAIJ100BX40-20 Is Used
Machine Changeover
Quickly adjust the 20-40 mm travel window to accommodate new product sizes on a packaging line without replacing the cylinder.
End-Stop Calibration
Fine-tune the exact retraction point during initial commissioning to prevent mechanical interference and ensure precise positioning.
Variable Forming Stops
Set specific retract depths for multi-stage forming operations where the rear stopper needs occasional micro-adjustments.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX40-20 the Right Cylinder?
The 20 mm adjustment screw lets you trim the retract stroke down to 20 mm during product changeovers, avoiding the need to physically swap out a fixed-stroke SAI cylinder. If your force requirements are lower, stepping down to an 80 mm bore yields 2513 N at 0.5 MPa.
Because the rear adjuster acts strictly as a mechanical stop and the air cushions only manage deceleration, this cylinder cannot hold a load without continuous live air pressure. For dead-load holding, consider an external rod lock, a pilot-operated check valve, or related AirTAC types like the SAIL or BSAI. To replace an existing ISO 15552 unit, match the 100 mm bore, 40 mm stroke, PT port threads, and the required mounting hardware.
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 SAIJ100 Adjustable Cylinder SAIJ100BX40-20 FAQ
If you increase the pressure to 0.9 MPa, the push force reaches 7068 N.
The rear adjuster acts as a mechanical stop that allows you to shorten the 40 mm nominal stroke by up to 20 mm, creating a 20 to 40 mm usable travel window. Note that this adjuster is a stop, not a lock, and cannot hold the load without live air pressure.
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Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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Related AirTAC SAI Cylinders
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