Airtac SAIJ125 Adjustable Cylinder SAIJ125AX100-30
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX100-30 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 100mm 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
- Stroke100 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX100-30
The AirTAC SAIJ125X100-30 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster that creates a 70 to 100 mm usable travel window. It delivers 6136 N of push force at 0.5 MPa and uses a SUS420J2 stainless steel rod (material code A) to resist corrosion in humid settings. The extruded aluminum barrel includes sensor grooves on both sides for flexible mounting.
Equipped with PT tapered G1/2 ports and a 32 mm rod, this model is built for robust performance. The rear screw stopper acts purely as a travel end-limit and deceleration point; it does not hold the load without live air pressure. For load-holding requirements, consider the SAIL or BSAI series instead.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX100-30 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX100-30 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 100 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 SAIJ125AX100-30
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×100 | 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 SAIJ125AX100-30 Is Used
Machine Setup & Changeover
Dial in the exact retract distance during equipment commissioning or product size changes, utilizing the 30 mm adjustment window to avoid mechanical redesign.
Variable End-Stop Positioning
Fine-tune the end-of-stroke position on heavy assembly presses where a fixed 100 mm stroke would require custom external stoppers.
High-Force Assembly Lines
Leverage the 6136 N push force at 0.5 MPa for heavy-duty clamping and joining tasks while retaining the flexibility to trim travel back to 70 mm.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX100-30 the Right Cylinder?
Choose this 125 mm bore if your application requires heavy thrust around 6136 N at 0.5 MPa, stepping up from a 100 mm bore that provides 3927 N. The adjustable stroke is ideal for product changeovers or fine-tuning the retract end-position during commissioning without swapping cylinders or adding external stops. Since the nominal stroke is 100 mm, side-load risks are minimal, but always guide the load externally for long unsupported travels.
To match this ISO 15552 replacement exactly, specify: 125 mm bore, 100 mm stroke, 30 mm adjustment range, PT G1/2 port, and your required mounting from the SAIJ set (Basic, FA, LB, TC, FTC, TCM1, TCM2). Note that this unit lacks a magnet for sensors; add the -S option if CMSE reed or DMSE electronic switches are needed.
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 SAIJ125AX100-30 FAQ
At an operating pressure of 0.5 MPa, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. At 0.7 MPa, the push force increases to 8590 N.
The rear adjuster screw allows you to shorten the effective travel from the nominal 100 mm down to 70 mm, creating a 70-100 mm adjustable window. This stopper only limits travel and does not lock the load without continuous air pressure.
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