Airtac SAIJ125 Adjustable Cylinder SAIJ125AX170-50S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX170-50S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 170mm 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
- Stroke170 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX170-50S
The AirTAC SAIJ125X170-50-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster, engineered to fine-tune the retract end-position during commissioning without adding external stops. With a nominal 170 mm stroke and a 50 mm adjustment range, it provides a usable travel window of 120-170 mm. Operating at 0.7 MPa, it delivers 8590 N of push force and 5734 N of pull force.
This SKU is configured with a SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance, and includes a magnet (-S) for direct compatibility with AirTAC CMSE reed and DMSE electronic solid-state sensors housed in the dual-side sensor grooves. The extruded aluminum barrel maintains standard ISO 15552 mounting dimensions while omitting the FB, CA, CB, and CR mounting formats, supporting only Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX170-50S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX170-50S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 170 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 SAIJ125AX170-50S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×170 | 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 SAIJ125AX170-50S Is Used
Variable End-Stop Machining
Dial in the exact clamping travel between 120 and 170 mm for different part lengths directly at the machine, eliminating the need to swap out physical spacer rings.
Product Changeover Setup
Rapidly reconfigure the retract position on a packaging line during format size changes, using the 50 mm adjustment range to fine-tune end stops without changing the cylinder.
Heavy-Duty Positioning
Leverage the 8590 N of thrust at 0.7 MPa to push heavy pallets or fixtures into a precise machining station while benefiting from the 40 mm variable air cushions at both ends.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX170-50S the Right Cylinder?
Selecting this 125 mm bore cylinder makes sense when an application requires the 6136 N push force available at 0.5 MPa, but demands on-site travel adjustments across a 120-170 mm window to accommodate varying product sizes. If an installation only needs fixed travel and lower force, stepping down to a 100 mm bore (providing 5497 N at 0.7 MPa) offers a smaller footprint. Conversely, heavier payloads requiring up to 14074 N at 0.7 MPa would necessitate moving up to the 160 mm bore.
Because the 170 mm stroke exceeds the 300 mm threshold where side-loading becomes a severe risk, the 32 mm piston rod and M27x2 rod thread provide robust mechanical support, though an external guide is still recommended for offset loads. The PT tapered port ensures a tight pneumatic seal. Remember that the rear adjuster is a physical stop that decelerates travel, not a lock; for load-holding without live air pressure, specify an AirTAC SAIL or BSAI cylinder.
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 SAIJ125AX170-50S FAQ
At an operating pressure of 0.7 MPa, this 125 mm bore cylinder generates 8590 N of push force and 5734 N of pull force. It operates on filtered air between 0.15 and 1.0 MPa, with a speed range of 30-500 mm/s.
The rear adjuster screw allows you to shorten the effective 170 mm nominal stroke by up to 50 mm, creating a usable travel window of 120-170 mm. This stopper decelerates the travel end but does not lock the load without continuous air pressure.
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