Airtac SAIJ125 Adjustable Cylinder SAIJ125X165-100S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X165-100S 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 SAIJ125X165-100S
The AirTAC SAIJ125X165-100-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, providing a usable travel window of 65 to 165 mm. Delivering 6136 N of push force at 0.5 MPa, this 125 mm bore unit handles heavy-duty positioning tasks. The extruded aluminum barrel features sensor grooves on both sides, and the integrated magnet (-S) directly supports AirTAC CMSE reed and DMSE electronic solid-state switches for precise end-position detection.
This model utilizes a PT tapered port thread and a robust 32 mm carbon steel rod with an M27x2 thread, offering high resistance against side loads. The rear stopper screw allows operators to dial in the exact retract distance during commissioning without adding external stops. It incorporates variable air cushions at both ends to decelerate heavy loads smoothly within its 30-500 mm/s speed range.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X165-100S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X165-100S |
|---|---|
| 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 SAIJ125X165-100S
| 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 SAIJ125X165-100S Is Used
Variable Length Gauging
Dial in the exact 65 to 165 mm retract distance during quality checks or when measuring varying part lengths without physically swapping out the actuator.
Machine Changeover
Quickly reconfigure the end-stop position for new product sizes on a packaging line by adjusting the rear screw, minimizing downtime between production runs.
Heavy Clamping Setup
Leverage the 6136 N push force to secure heavy workpieces, using the adjustable stroke to fine-tune the clamping depth precisely at machine commissioning.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X165-100S the Right Cylinder?
Choose this 125 mm bore cylinder when an application demands high thrust (6136 N at 0.5 MPa) alongside variable end-position tuning. If your setup requires less force, stepping down to a 100 mm bore yields 3927 N, whereas upgrading to a 160 mm bore provides 10053 N. The adjustable stroke is ideal for product-size changeovers on a line, allowing the retract distance to be shortened by up to 100 mm without swapping the cylinder. For load-holding without live air pressure, note that the rear adjuster functions only as a travel stop; you must integrate an external rod lock or select an AirTAC SAIL or BSAI cylinder.
To match this ISO 15552 interchangeable cylinder for a replacement, verify the 125 mm bore, 165 mm nominal stroke, 100 mm adjustment range, PT port thread, and the -S magnet requirement. Mounting is limited to the SAIJ subset: Basic, FA, LB, TC, FTC, TCM1, and TCM2 (omitting FB, CA, CB, and CR). Because the 165 mm stroke is relatively short for this bore, side-load concerns are minimal, but an external guide remains recommended for heavy lateral 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 SAIJ125 Adjustable Cylinder SAIJ125X165-100S FAQ
The rear adjuster acts as a mechanical stop that lets you shorten the effective stroke by up to 100 mm. This creates a usable travel window of 65 to 165 mm, allowing you to fine-tune the retract end position without replacing the cylinder.
At a 0.5 MPa operating pressure, it provides 6136 N of push force and 5734 N of pull force. If operated at 0.7 MPa, the push force increases to 8590 N.
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