Airtac SAIJ125 Adjustable Cylinder SAIJ125X240-75S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X240-75S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 240mm 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
- Stroke240 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X240-75S
The AirTAC SAIJ125X240-75-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear-mounted stroke adjuster. It delivers a robust 6136N push force at 0.5 MPa and features a generous 75mm adjustment range, allowing you to tune the effective travel down from the 240mm nominal stroke to a 165-240mm window. This built-in adjustability eliminates the need to swap cylinders or bolt on external stops during product changeovers.
This SAIJ variant includes a magnet for position sensing and is designed to accept AirTAC CMSE reed and DMSE solid-state switches housed in its dual-sided extruded aluminum barrel sensor grooves. It uses a PT tapered port and a 32mm carbon steel rod. The rear adjuster functions strictly as a travel stop that works in tandem with the variable air cushions at both ends; it is not a locking mechanism and cannot hold a load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X240-75S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X240-75S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 240 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 SAIJ125X240-75S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×240 | 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 SAIJ125X240-75S Is Used
Product Size Changeovers
Dial in the 165-240mm travel window on the fly to accommodate varying package lengths on a packaging line without physically swapping out the cylinder.
Machine Setup Calibration
Use the 75mm rear stopper to precisely set the retract end-position during initial commissioning, ensuring perfect alignment of high-force pressing tools.
Adjustable End-Stops
Ideal for automated assembly stations where the retraction point needs periodic tuning to compensate for tooling wear or varying material thicknesses.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X240-75S the Right Cylinder?
Choose this 125mm bore cylinder when your application requires high thrust forces up to 6136N at 0.5 MPa (or 8590N at 0.7 MPa) alongside frequent end-position adjustments. If your setup demands less force, stepping down to an 80mm bore provides 2513N at 0.5 MPa, whereas moving up to a 160mm bore yields 10053N. The 75mm adjustment window is ideal for machinery that processes multiple product sizes, allowing operators to fine-tune the retract position at commissioning without replacing the entire actuator.
Because this is a 240mm stroke, it falls well within the 1500mm maximum standard stroke for this bore, making it a readily available configuration. For true fail-safe load holding without continuous air supply, you must look to the SAIL air-released lock series, the BSAI clamp-lock, or an external pilot-operated check valve, as the SAIJ adjuster only sets the travel end. This model is dimensionally interchangeable per ISO 15552 and uses a reduced mounting subset of 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 SAIJ125X240-75S FAQ
At 0.5 MPa, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. If you increase the operating pressure to 0.7 MPa, the push force rises to 8590N.
The rear adjuster screw acts as a mechanical stop that lets you shorten the effective travel from the 240mm nominal stroke down to as little as 165mm. This creates a 165-240mm usable window for fine-tuning the end position without moving the cylinder mount.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC SAI Cylinders
Request a Quote for Airtac SAIJ125 Adjustable Cylinder SAIJ125X240-75S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.