Airtac SAIJ125 Adjustable Cylinder SAIJ125AX700-50S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX700-50S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 700mm 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
- Stroke700 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX700-50S
The AirTAC SAIJ125X700-50-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster, engineered to trim the effective travel window down to 650-700 mm from its 700 mm nominal length. Delivering 6136 N of push force at 0.5 MPa (up to 11045 N at 0.9 MPa), it handles heavy actuation tasks with precision. The integrated -S magnet enables position sensing via AirTAC CMSE reed or DMSE solid-state switches fitted into the dual-side sensor grooves.
This SKU is configured with a SUS420J2 stainless steel rod (code A) for superior corrosion resistance and PT tapered ports for a robust pneumatic connection. The rear adjuster functions strictly as a mechanical stop to fine-tune the retract end position during commissioning; it does not lock the load without live air pressure. For load-holding requirements without continuous air supply, a SAIL or BSAI cylinder is recommended instead.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX700-50S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX700-50S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 700 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 SAIJ125AX700-50S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×700 | 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 SAIJ125AX700-50S Is Used
Variable End-Stop Tooling
Dial in the retract position by up to 50 mm during machine setup to accommodate varying workpiece sizes without physically remounting the actuator.
Heavy Assembly Pressing
Leverage 6136 N of push force at 0.5 MPa for pressing bearings or pins, using the rear stop to precisely limit the pressing depth.
Product Changeover Diverter
Adjust the stroke window from 650 to 700 mm on the fly to reroute different package sizes on a packaging line during rapid format changes.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX700-50S the Right Cylinder?
Selecting this 125 mm bore over a smaller 100 mm unit upgrades your thrust from 3927 N to 6136 N at 0.5 MPa, providing the necessary force margin for high-mass tooling or heavy clamping. The 50 mm adjustment range is ideal for product changeovers, allowing operators to dial in the exact end-stop position without swapping the cylinder or adding external shims. Because the 700 mm stroke is substantial, an external guide rail is strongly advised to prevent excessive side-loading on the 32 mm rod, despite the rod's robust M27x2 thread.
When matching this adjustable cylinder to an existing ISO 15552 footprint, verify the 125 mm bore, 700 mm nominal stroke, 50 mm adjustment window, PT port threads, and the -S magnet requirement. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options, deliberately omitting FB, CA, CB, and CR brackets to streamline the profile design. Operating speed is optimized for 30-500 mm/s, and the unit features variable air cushions at both ends to manage kinetic energy.
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 SAIJ125AX700-50S FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. If pressure is increased to 0.9 MPa, the push force reaches 11045 N.
The rear adjuster acts as a mechanical stop that allows you to shorten the 700 mm nominal stroke by up to 50 mm, creating a 650-700 mm usable travel window. It sets the end position but does not hold the load without live air pressure.
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