Airtac SAIJ125 Adjustable Cylinder SAIJ125X135-10
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X135-10 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 135mm 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
- Stroke135 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X135-10
The AirTAC SAIJ125X135-10 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that permits a usable travel window of 125 to 135 mm. It delivers a robust 6136 N push force at 0.5 MPa, making it suitable for heavy-duty positioning tasks. The extruded aluminum barrel includes sensor grooves on both sides, allowing direct mounting of CMSE reed or DMSE electronic sensors if a magnet is added later.
A defining feature of this SKU is the 10 mm external adjustment screw at the rear, which fine-tunes the retract end position during commissioning without requiring external stops. The rod is constructed from standard carbon steel with an M27x2 thread, and the mounting interface intentionally omits FB, CA, CB, and CR brackets, utilizing a focused set of Basic, FA, LB, TC, FTC, TCM1, and TCM2 mounts.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X135-10 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X135-10 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 135 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 SAIJ125X135-10
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×135 | 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 SAIJ125X135-10 Is Used
Changeover Adjustment
Dial in the exact retract position within a 125 to 135 mm window during machine setup for varying product sizes without swapping hardware.
Heavy Positioning
Leverage the 6136 N push force at 0.5 MPa to move heavy fixtures into place, using the rear screw to fine-tune the final resting coordinate.
Assembly Press
Execute controlled pressing operations where the 10 mm adjustment tailors the bottoming depth precisely to the workpiece tolerance.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X135-10 the Right Cylinder?
Select this 125 mm bore cylinder when an application requires substantial thrust, such as the 8590 N push force generated at 0.7 MPa, alongside precise end-position tuning within a 125 to 135 mm window. If your force requirements are lower, stepping down to a 100 mm bore yields 3927 N at 0.5 MPa, whereas stepping up to a 160 mm bore provides 10053 N. The adjustable stroke is ideal for product changeovers on a line, functioning as a travel stop rather than a load lock.
For any load-holding requirements without live air pressure, this cylinder is insufficient as the adjuster and air cushions do not brake or hold the load; consider an SAIL pneumatic lock, a BSAI clamp-lock, or an external rod lock instead. As a dimensionally interchangeable ISO 15552 cylinder, match the exact 135 mm stroke, 10 mm adjustment, PT tapered port thread, and mounting choice for a direct replacement. The 32 mm rod handles side loads well, but for the 135 mm stroke, ensure external guidance for long unsupported loads.
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 SAIJ125X135-10 FAQ
At a 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 acts as a mechanical stop, allowing you to shorten the effective stroke from the nominal 135 mm down to 125 mm. It sets the travel end during commissioning but does not lock or hold the load without continuous air pressure.
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