Airtac SAIJ125 Adjustable Cylinder SAIJ125AX100-50S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX100-50S 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 SAIJ125AX100-50S
The AirTAC SAIJ125X100-50-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a 50 to 100 mm usable travel window, letting you dial back the nominal 100 mm stroke by up to 50 mm during commissioning without adding external stops. It delivers 6136 N of push force at 0.5 MPa, making it suited for heavy loads.
This variant includes a SUS420J2 stainless steel rod for corrosion resistance and a magnet for CMSE reed and DMSE solid-state sensors. The 32 mm rod and M27x2 thread handle high side loads, while the PT tapered ports seal securely. It uses the standard SAIJ mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2).
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX100-50S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX100-50S |
|---|---|
| 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 SAIJ125AX100-50S
| 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 SAIJ125AX100-50S Is Used
Variable End-Stop Forming
Dial in the 50-100 mm travel window to set precise pressing depths for different material batches without swapping the cylinder.
Product Changeover Diverter
Quickly adjust the rear stopper on a packaging line to accommodate varying package sizes on the fly.
Heavy Load Positioning
Leverage the 6136 N push force to move heavy pallets, tuning the end position to match machine tooling constraints.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX100-50S the Right Cylinder?
Choose this 125 mm bore when a 100 mm bore (3927 N at 0.5 MPa) lacks thrust, but a 160 mm bore (10053 N) is oversized. The 50 mm adjustable window is ideal for product changeovers requiring variable end-stops. For position holding without live air, use a SAIL or BSAI lock cylinder, as the rear adjuster is a stop, not a brake.
To match this ISO 15552 cylinder, specify: 125 mm bore, 100 mm stroke, 50 mm adjustment, PT G1/2 ports, Basic/FA/LB/TC/FTC/TCM1/TCM2 mounting, and the -S magnet. The 100 mm stroke is short enough to avoid rod deflection, but long strokes need an external guide.
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 SAIJ125AX100-50S 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 0.7 MPa, the push force increases to 8590 N.
The rear adjuster screw lets you shorten the effective stroke from the nominal 100 mm down to 50 mm. This creates a 50-100 mm travel window for fine-tuning end positions at commissioning without external stops.
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