Airtac SAIJ125 Adjustable Cylinder SAIJ125AX165-100S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX165-100S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 165mm 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
- Stroke165 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX165-100S
The AirTAC SAIJ125X165-100-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to trim the nominal 165 mm travel back by up to 100 mm. This creates a highly flexible 65-165 mm usable window, letting you dial in the exact retract end-position at commissioning without swapping the hardware or adding external stops. It delivers a robust 8590 N pull force at 0.7 MPa, making it suitable for heavy-duty positioning tasks.
This specific configuration includes a SUS420J2 stainless steel rod (option A) for enhanced corrosion resistance and a built-in magnet (-S) that operates seamlessly with AirTAC CMSE reed and DMSE electronic solid-state sensors housed in the dual-side extruded aluminum barrel grooves. The 32 mm rod and M27x2 thread provide excellent structural rigidity, though unsupported loads still require an external guide. The rear adjuster acts purely as a travel stop to set deceleration, so it will not hold a load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX165-100S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX165-100S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 165 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 SAIJ125AX165-100S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×165 | 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 SAIJ125AX165-100S Is Used
Variable End-Stop Configuration
Set precise retract distances between 65 and 165 mm on packaging lines to accommodate different carton sizes without physically repositioning the cylinder mount.
Heavy-Duty Machine Changeover
Leverage the 8590 N pull force at 0.7 MPa to move heavy jigs, using the 100 mm adjustment window to fine-tune the final resting position during product line transitions.
Corrosive-Resistant Positioning
Utilize the SUS420J2 stainless steel rod in humid manufacturing environments to push or pull components reliably while maintaining structural integrity.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX165-100S the Right Cylinder?
Choose this 125 mm bore when a 100 mm bore (providing 5497 N push at 0.7 MPa) lacks the necessary thrust, but you want to avoid stepping up to a 160 mm bore that would demand significantly more space and air volume. An adjustable stroke is ideal here over a fixed SAI cylinder when your application requires frequent product-size changeovers or variable end-stops on a single machine bed. To replace this ISO 15552 cylinder, match the 125 mm bore, 165 mm stroke, 100 mm adjustment range, PT tapered port thread, SUS420J2 rod, and -S magnet. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2. Because the stroke is under 300 mm, side-load risks are lower, but external guiding is still recommended for heavy lateral loads. For load-holding without live pressure, consider the SAIL or BSAI series, as the SAIJ rear stop is not a lock.
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 SAIJ125AX165-100S FAQ
At 0.7 MPa operating pressure, this 125 mm bore cylinder provides 8590 N of push force and 8590 N of pull force. It can achieve a maximum push force of 11045 N at 0.9 MPa.
The rear adjuster acts as a mechanical stop, allowing you to shorten the 165 mm nominal stroke by up to 100 mm, creating a 65-165 mm usable travel window. It sets the end-position and deceleration but does not lock the load without continuous air pressure.
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