Airtac SAIJ125 Adjustable Cylinder SAIJ125X750-75
The AirTAC SAIJ125 Adjustable Cylinder SAIJ125X750-75 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 750mm stroke, G1/2 air ports and adjustable end cushioning. Its standardized mounting interface makes it interchangeable with other ISO 15552 cylinders at the mounting interface.
- BoreØ125 mm
- Stroke750 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X750-75
By turning the external rear screw, operators can shorten the effective travel, creating a precise 675 to 750mm usable stroke window without swapping the barrel. This on-machine fine-tuning is ideal for product changeovers or dialing in exact end positions during commissioning.
Featuring a 32mm carbon steel piston rod with an M27x2 thread, this large-bore unit handles substantial loads with a 40mm cushion length to absorb kinetic energy at travel ends. It uses a PT tapered G1/2 port and operates at 30 to 500mm/s. 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.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X750-75 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X750-75 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 750 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 | 5734 N | 5734 N |
| 0.7 MPa | 8027 N | — |
| Max (@1.0 MPa) | 1169 kgf | |
Double-rod model: the rod passes through the rear cover, so both piston faces lose rod area and push is shown at the annular-area value. Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ125 Adjustable Cylinder SAIJ125X750-75
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×750 | 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 SAIJ125X750-75 Is Used
Machine Changeover
Dial in the retract position by up to 75mm during product size changes without physically remounting the cylinder or adding external stopper blocks.
End-Position Tuning
Fine-tune the 675-750mm travel window at commissioning to perfect the seating force of large jigs or heavy pressing operations.
Variable Diverter Stroke
Adjust the retract distance of a heavy-duty diverter arm on the fly to accommodate different package widths on a shared conveyor line.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X750-75 the Right Cylinder?
When sizing this 125mm bore unit, stepping down to a 100mm bore reduces the 0.5MPa push force to 3927N, whereas moving up to a 160mm bore yields 10053N. Choose this adjustable SAIJ variant over a fixed-stroke SAI when a machine requires variable end stops or precise retract positioning without adding external physical stops.
Because the 750mm stroke is substantial, the unsupported rod is prone to side-loading; an external guide rail is recommended to prevent premature seal wear. For ISO 15552 replacement matching, specify the 125mm bore, 750mm stroke, 75mm adjustment, PT G1/2 port, and the correct mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2). Note that the rear adjuster and air cushions only decelerate the load; they do not hold position without live air, so consider a SAIL or BSAI locking cylinder for fail-safe load holding.
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 SAIJ125X750-75 FAQ
At the maximum 1.0 MPa pressure, it delivers up to 1251 kgf.
The rear adjuster screw acts as a mechanical stop that lets you trim the effective travel back from the 750mm nominal stroke down to a 675mm minimum. It sets the retract end-position and relies on the 40mm air cushion for deceleration, but it does not lock the load without continuous air pressure.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC SAI Cylinders
Request a Quote for Airtac SAIJ125 Adjustable Cylinder SAIJ125X750-75
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.