Airtac SAIJ125 Adjustable Cylinder SAIJ125AX175-30S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX175-30S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 175mm 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
- Stroke175 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX175-30S
The AirTAC SAIJ125X175-30-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, providing a usable travel window of 145 to 175 mm. Delivering 6136 N of push force at 0.5 MPa, it handles heavy-duty positioning with precision. The extruded aluminum barrel features sensor grooves on both sides, and this unit includes a magnet (-S) for use with AirTAC CMSE reed and DMSE electronic solid-state switches.
This model features a SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance and uses PT tapered port threads. The rear adjuster acts strictly as a mechanical stop to fine-tune the retract position during commissioning; it is not a locking device and will not hold the load without live air pressure. For load-holding requirements, consider the SAIL or BSAI series.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX175-30S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX175-30S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 175 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 SAIJ125AX175-30S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×175 | 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 SAIJ125AX175-30S Is Used
Product Changeover
Dial in the 145-175 mm travel window during format size changes on a packaging line, avoiding the need to physically swap cylinders for different product lengths.
Heavy Clamping
Utilize the 6136 N push force to secure heavy workpieces, relying on the rear stopper to precisely set the clamp position without over-travel.
Assembly Pressing
Apply exact pressing forces in automated assembly cells, using the fine stroke adjustment to compensate for tooling wear or varying material thicknesses.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX175-30S the Right Cylinder?
Choose this 125 mm bore when a smaller 100 mm cylinder (providing 3927 N push force at 0.5 MPa) lacks the necessary thrust, but a 160 mm bore is physically too large. The 30 mm adjustment window is selected over a fixed-stroke SAI cylinder when a machine must accommodate slight dimensional variances or product changeovers without adding external stops. At 175 mm stroke, the 32 mm rod diameter provides robust resistance to bending, though external guides are recommended if the load is heavy or unsupported.
To match this ISO 15552 interchangeable cylinder exactly, specify: 125 mm bore, 175 mm stroke, 30 mm adjustment, PT port threads, SUS420J2 rod material, and the -S magnet option. The available mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2.
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 SAIJ125AX175-30S FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. At the maximum 1.0 MPa pressure, it achieves a push force of 1251 kgf.
The rear adjuster screw allows you to mechanically shorten the effective stroke from its nominal 175 mm down to 145 mm. This creates a 145-175 mm travel window for fine-tuning the end position at commissioning, but the screw acts only as a stop and does not lock the load without air pressure.
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