Airtac SAIJ40 Adjustable Cylinder SAIJ40BX30-10S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX30-10S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 30mm 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
- Stroke30 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX30-10S
The AirTAC SAIJ40X30-10-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering 628N of push force at 0.5 MPa. It features a SUS304 stainless steel rod and a built-in magnet for position sensing. By turning the rear stopper screw, you can trim the effective travel down by up to 10 mm, creating a precise 20-30 mm usable stroke window without swapping hardware.
This adjustability is invaluable during machine commissioning or product changeovers, allowing you to fine-tune the retract end-position on the fly. The extruded aluminum barrel includes sensor grooves on both sides for direct mounting of CMSE reed or DMSE electronic switches. It supports a reduced set of ISO 15552 mounting options—Basic, FA, LB, TC, FTC, TCM1, and TCM2—omitting FB, CA, CB, and CR.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX30-10S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX30-10S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 30 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 SAIJ40BX30-10S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×30 | 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 SAIJ40BX30-10S Is Used
Changeover Calibration
Dial in the 20-30 mm retract position precisely when switching between product sizes on a packaging line, avoiding mechanical rebuilds.
Short-Stroke Clamping
Secure delicate workpieces with exactly 628N of push force, using the rear screw to limit travel and prevent over-travel damage.
Sensor Equipped Sorting
Leverage the built-in magnet with DMSE electronic sensors to confirm part ejection across a variable 20 to 30 mm adjustable stroke.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX30-10S the Right Cylinder?
Select this 40 mm bore when you need more thrust than a 32 mm cylinder (which provides 402N push at 0.5 MPa) but have tight spatial limits, stepping down from a 50 mm bore (982N push) to save space. The adjustable 20-30 mm travel window is chosen over a fixed SAI cylinder when a machine handles multiple product sizes and requires variable end-stops during line changeovers. For this SKU, specify the PT tapered port thread, SUS304 (B) rod material, and the -S magnet option.
Because the rear adjuster acts strictly as a travel stop and the air cushions handle deceleration, neither will hold a load securely without live air pressure. If your application requires true load-holding, consider an AirTAC SAIL pneumatic lock, a BSAI clamp-lock cylinder, or an external pilot-operated check valve. The 16 mm rod and M12x1.25 thread provide good side-load resistance, though even short-stroke setups should rely on external guides for heavy off-center loads.
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 SAIJ40BX30-10S FAQ
It features a rear stopper screw that allows you to shorten the nominal 30 mm stroke by up to 10 mm. This creates a usable travel window of 20-30 mm, letting you fine-tune the end position at commissioning without adding external stops.
Operating at 0.5 MPa, the SAIJ40X30-10-S provides 628N of push force and 528N of pull force. At 0.7 MPa, the push force increases to 879N.
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