Airtac Adjustable Cylinder SAIJ32 SAIJ32BX40-20
The AirTAC Airtac Adjustable Cylinder SAIJ32 SAIJ32BX40-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø32mm bore and 40mm stroke, G1/8 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ32 mm
- Stroke40 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM10×1.25
- CushionAdjustable, 27 mm
About the Airtac Adjustable Cylinder SAIJ32 SAIJ32BX40-20
The AirTAC SAIJ32X40-20 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a nominal 40 mm stroke that can be fine-tuned down by up to 20 mm, giving operators a precise 20-40 mm usable travel window during commissioning. In the compact 32 mm bore class, it delivers 402 N of push force at 0.5 MPa and 724 N at 0.9 MPa.
This unit is configured with a SUS304 stainless steel rod for superior corrosion resistance and a PT tapered port thread. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch placement. You can mount CMSE reed or DMSE electronic sensors if position feedback is needed later, though this specific SKU ships without a magnet.
Airtac Adjustable Cylinder SAIJ32 SAIJ32BX40-20 Technical Specifications
| Model | Airtac Adjustable Cylinder SAIJ32 SAIJ32BX40-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø32 mm |
| Stroke | 40 mm |
| Acting type | Double acting |
| Port size | G1/8 |
| Rod thread | M10×1.25 |
| 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, 27 mm |
| Max stroke | Up to 1000 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 (Ø32mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 402 N | 346 N |
| 0.7 MPa | 563 N | — |
| Max (@1.0 MPa) | 82 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac Adjustable Cylinder SAIJ32 SAIJ32BX40-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 32 | 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 Adjustable Cylinder SAIJ32 SAIJ32BX40-20 Is Used
Precision Positioning
Dial in the exact retraction point within the 20-40 mm window during machine commissioning to achieve perfect part alignment without swapping hardware.
Product Changeover
Quickly adjust the end-stop to accommodate slight variations in incoming part sizes on a high-mix assembly line.
Clamping Force Setup
Fine-tune the clamping travel to prevent damage to delicate workpieces while utilizing the cylinder's 724 N peak thrust at 0.9 MPa.
Is the Airtac Adjustable Cylinder SAIJ32 SAIJ32BX40-20 the Right Cylinder?
Choose this 32 mm bore adjustable cylinder when your setup requires exact end-position tuning without adding external stops. If your application needs less force, stepping down is not an option below 32 mm in this series, but if you need significantly more thrust, the 40 mm bore provides 628 N at 0.5 MPa. The rear screw on this SAIJ model acts strictly as a travel stop and works alongside the standard air cushions to decelerate the piston; it is not a locking device. For load-holding without live air pressure, consider an external pilot-operated check valve or the SAIL series.
When matching an ISO 15552 replacement, verify the 32 mm bore, 40 mm stroke, 20 mm adjustment range, PT port thread, and your required mounting style. SAIJ supports a specific subset of mounts: Basic, FA, LB, TC, FTC, TCM1, and TCM2. The 12 mm diameter rod and M10x1.25 thread handle moderate side loads well, but even at this short 40 mm stroke, always guide the load externally to prevent binding.
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 Adjustable Cylinder SAIJ32 SAIJ32BX40-20 FAQ
At 0.5 MPa, this 32 mm bore cylinder provides 402 N of push force and 345 N of pull force. At the maximum operating pressure of 0.9 MPa, the push force increases to 724 N.
The rear adjuster screw allows you to shorten the effective travel from the nominal 40 mm down to a minimum of 20 mm, creating a 20-40 mm usable window. This stopper only sets the end position and does not lock the load.
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