Airtac SAIJ40 Adjustable Cylinder SAIJ40AX30-20
The AirTAC SAIJ40 Adjustable Cylinder SAIJ40AX30-20 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 interchangeable with other ISO 15552 cylinders at the mounting interface.
- BoreØ40 mm
- Stroke30 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 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 SAIJ40 Adjustable Cylinder SAIJ40AX30-20
The AirTAC SAIJ40X30-20 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that creates a highly versatile 10-30 mm usable travel window from its 30 mm nominal stroke.
This adjustable design allows operators to fine-tune the retract end-position during commissioning without adding external stops. The extruded aluminum barrel includes sensor grooves on both sides for flexible mounting of CMSE reed or DMSE electronic switches, while the rear adjuster functions strictly as a travel stop, not a load-holding lock.
Airtac SAIJ40 Adjustable Cylinder SAIJ40AX30-20 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40AX30-20 |
|---|---|
| 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 | 528 N | 528 N |
| 0.7 MPa | 739 N | — |
| Max (@1.0 MPa) | 108 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 SAIJ40 Adjustable Cylinder SAIJ40AX30-20
| 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 SAIJ40AX30-20 Is Used
Short-Stroke End Tuning
Perfect for dialing in exact retract positions on clamping or ejecting mechanisms where a 10 to 30 mm travel window must be perfected during machine commissioning.
Tooling Changeovers
Allows operators to quickly adapt the cylinder's effective stroke when swapping short-stroke tooling on a production line, avoiding the need to physically replace the actuator.
Variable Stop Setup
Ideal for testing rigs and small assembly stations that require an external mechanical stop to be finely adjusted against a set point without re-engineering the fixture.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40AX30-20 the Right Cylinder?
An adjustable stroke is ideal for machine setups requiring variable end-stops rather than committing to a fixed-stroke SAI cylinder.
Because the stroke is under 300 mm, side-load stress is minimal, though the 16mm rod and M12x1.25 thread handle standard loads effectively. Remember that the rear adjuster and air cushions only decelerate the travel end; the SAIJ does not hold position without live air. For load-holding without pressure, consider an external rod lock or the SAIL series. Mounting options are limited to Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB and CA brackets.
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 SAIJ40AX30-20 FAQ
It operates at speeds between 30 and 800 mm/s, supported by 30mm air cushions at both ends.
The rear adjuster screw allows you to shorten the effective stroke by up to 20mm. This gives the SAIJ40X30-20 a usable travel window of 10 to 30mm, letting you fine-tune the end position at commissioning without swapping the cylinder. The adjuster acts only as a travel stop and does not lock the load.
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1-Year Warranty
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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Most inquiries answered within 7-8 hours.
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