Airtac SAIJ125 Adjustable Cylinder SAIJ125X750-100S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X750-100S 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 a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ125 mm
- Stroke750 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X750-100S
The AirTAC SAIJ125X750-100-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to trim the effective travel back by up to 100 mm. This yields a usable stroke window of 650-750 mm, letting you dial in the exact retracted end-position during commissioning without adding bulky external stops. In the 125 mm bore class, it delivers a robust 6136 N pull force at 0.5 MPa and a maximum of 1251 kgf at 1.0 MPa.
Equipped with a standard carbon steel rod and a -S magnet, this unit supports AirTAC CMSE reed and DMSE solid-state sensors housed in the dual-sided extruded aluminum barrel grooves. It uses PT tapered ports and variable air cushions at both ends to manage kinetic energy. The rear adjuster acts purely as a mechanical stop for position tuning and does not function as a load-holding lock.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X750-100S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X750-100S |
|---|---|
| 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 | 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 SAIJ125X750-100S
| 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 SAIJ125X750-100S Is Used
Variable End-Stop Tuning
Dial in the exact 650-750 mm retracted position during machine commissioning to perfect product ejection without swapping out the entire cylinder.
Product Changeover
Quickly adapt the stroke length on packaging lines when handling different carton sizes, using the 100 mm adjustment range to avoid mechanical rebuilds.
Long-Stroke Assembly
Leverage the 6136 N pull force over a 750 mm travel window to press or position heavy components, relying on the rear stopper for precise final placement.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X750-100S the Right Cylinder?
Choose this adjustable-stroke model when a fixed-stroke SAI cylinder cannot accommodate product size changeovers or fine-tuning requirements on a long 750 mm stroke. If your application requires less force, stepping down to an 80 mm bore yields 2268 N of pull at 0.5 MPa, whereas moving up to a 160 mm bore provides 9425 N. Because the nominal stroke is 750 mm, the 32 mm rod diameter requires an external guide to prevent excessive side-loading and premature seal wear over that extended distance.
The SAIJ series supports a reduced mounting subset of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting the FB, CA, CB, and CR options. Since the rear adjuster only sets the travel end and relies on live air, it will not hold a load unpowered; for true fail-safe holding, consider the SAIL or BSAI locking cylinders. To replace an ISO 15552 cylinder, match the 125 mm bore, 750 mm stroke, 100 mm adjustment, PT port, and -S magnet.
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 SAIJ125X750-100S FAQ
The rear adjusting screw acts as a mechanical stopper that shortens the effective stroke by up to 100 mm. This creates a usable travel window of 650-750 mm, allowing you to fine-tune the retracted end-position without replacing the cylinder.
At a 0.5 MPa operating pressure, it provides 6136 N of pull force and 5734 N of push force. At its maximum 1.0 MPa pressure, the cylinder can deliver up to 1251 kgf of thrust.
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