Airtac SAIJ125 Adjustable Cylinder SAIJ125AX165-10S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX165-10S 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 SAIJ125AX165-10S
The AirTAC SAIJ125X165-10-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster. It provides a usable travel window of 155 to 165 mm, allowing you to dial in the retract end-position precisely during commissioning without adding external stops. The bore delivers 6136 N of push force at 0.5 MPa, scaling up to 11045 N at 0.9 MPa.
This unit features a SUS420J2 stainless steel rod (option A) for superior corrosion resistance and includes a magnet (-S) for use with AirTAC CMSE reed and DMSE solid-state sensors. It uses PT tapered ports and operates at speeds between 30 and 500 mm/s. The mounting set covers Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting the FB, CA, CB, and CR options.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX165-10S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX165-10S |
|---|---|
| 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 SAIJ125AX165-10S
| 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 SAIJ125AX165-10S Is Used
Machine Setup Tuning
Dial in the exact retract position within the 155-165 mm window during initial commissioning without swapping out the cylinder.
Product Changeover
Quickly adjust the end-stop by up to 10 mm on a packaging line when switching to a different product size.
High-Force Positioning
Leverage the 6136 N push force at 0.5 MPa to move heavy jigs while relying on the adjuster to set the exact travel limit.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX165-10S the Right Cylinder?
Choose this 125 mm bore when an 80 mm cylinder's 2513 N push force at 0.5 MPa is insufficient, but a 160 mm bore delivering 10053 N would be excessive. The 10 mm adjustment range is ideal for fine-tuning product changeovers. Because the stroke is 165 mm, side-load risks are low, but always guide the rod end on longer travels.
To match an ISO 15552 replacement, verify the 125 mm bore, 165 mm stroke, 10 mm adjuster, PT G1/2 ports, and the -S magnet. Remember that the rear adjuster is a travel stop, not a lock; this SAIJ cylinder will not hold a load without live air. For true load-holding, use an external rod lock, a pilot-operated check valve, or the AirTAC SAIL and BSAI series.
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 SAIJ125AX165-10S FAQ
At 0.5 MPa, it provides 6136 N of push force and 5734 N of pull force. At 0.9 MPa, the push force increases to 11045 N.
The rear adjuster acts as a mechanical stop, allowing you to shorten the 165 mm nominal stroke by up to 10 mm, creating a usable travel window of 155 to 165 mm. It is a stop, not a lock, and cannot hold the load without live air pressure.
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