Airtac SAIJ125 Adjustable Cylinder SAIJ125AX105-40S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX105-40S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 105mm stroke, G1/2 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ125 mm
- Stroke105 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX105-40S
The AirTAC SAIJ125X105-40-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that creates a 65-105 mm usable travel window from its 105 mm nominal stroke. Equipped with a -S magnet, it integrates seamlessly with AirTAC CMSE reed and DMSE electronic solid-state sensors housed in the dual-side extruded aluminum barrel grooves. The SUS420J2 stainless steel rod (code A) elevates corrosion resistance for harsher industrial settings.
Delivering 6136 N of push force at 0.5 MPa and reaching 11045 N at 0.9 MPa, this 125 mm bore actuator handles heavy loads. The rear stopper allows precise end-position tuning during commissioning without swapping the cylinder. Remember the adjuster is a travel stop, not a lock; it cannot hold loads without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX105-40S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX105-40S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 105 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| Rod thread | M27×2 |
| 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 – 500 mm/s |
| Cushion | Adjustable, 40 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 (Ø125mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 6136 N | 5734 N |
| 0.7 MPa | 8590 N | — |
| Max (@1.0 MPa) | 1251 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ125 Adjustable Cylinder SAIJ125AX105-40S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×105 | 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 SAIJ125 Adjustable Cylinder SAIJ125AX105-40S Is Used
Variable End-Stop Tuning
Fine-tune the retract position within a 65-105 mm window during machine commissioning to perfectly align heavy clamping forces without machining external stop blocks.
Product Size Changeovers
Rapidly adjust the stroke by up to 40 mm on packaging lines handling varying pallet or container sizes, minimizing downtime between production runs.
Heavy Assembly Positioning
Leverage the 6136 N push force at 0.5 MPa to move and position substantial automotive or steel components into exact alignment before a secondary operation.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX105-40S the Right Cylinder?
Select this 125 mm bore when an 80 mm cylinder (providing 2513 N push at 0.5 MPa) lacks thrust, but a 160 mm bore (10053 N at 0.5 MPa) is physically oversized. The 40 mm adjustment range is ideal for product-size changeovers on a line, letting you dial in the exact 65 to 105 mm end-stop without adding external stops. For a direct ISO 15552 replacement, match the 125 mm bore, 105 mm stroke, PT tapered ports, and -S magnet.
Because the nominal stroke is 105 mm, it falls under the 300 mm threshold, yet the 32 mm rod diameter and M27x2 rod thread still provide substantial rigidity against side loads. If your application requires true load-holding without continuous air pressure, consider an AirTAC SAIL pneumatic lock or BSAI clamp-lock cylinder instead of relying on the rear adjuster.
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 SAIJ125 Adjustable Cylinder SAIJ125AX105-40S FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. If pressure is increased to 0.9 MPa, the push force reaches 11045 N.
The rear adjuster acts as a mechanical stop that trims the effective travel. For this 105 mm nominal stroke cylinder, the -40 code allows you to shorten the stroke by up to 40 mm, creating a usable 65-105 mm travel window. It only sets the end position and does not lock the load.
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