Airtac SAIJ125 Adjustable Cylinder SAIJ125X125-30
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X125-30 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 125mm 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
- Stroke125 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X125-30
The AirTAC SAIJ125X125-30 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering robust performance for heavy-duty pneumatic setups. It features a 125mm bore and a nominal 125mm stroke, but the external stopper lets you dial back the effective travel by up to 30mm. This creates a precise 95-125mm usable stroke window, enabling exact end-position tuning at commissioning without swapping the actuator or adding external stops.
In this configuration, the carbon steel piston rod and PT tapered port handle substantial forces, yielding 6136N of pull force at 0.5MPa and 8590N at 0.7MPa. The rear adjuster acts purely as a travel stop to fine-tune deceleration and does not hold the load without live air pressure. For load-holding requirements, consider the SAIL or BSAI series instead.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X125-30 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X125-30 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 125 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 SAIJ125X125-30
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×125 | 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 SAIJ125X125-30 Is Used
Product Changeover
Dial in the 95-125mm travel window during product size transitions on a packaging line without physically swapping the cylinder or repositioning hard stops.
Press End-Tuning
Fine-tune the exact retraction end-position during machine commissioning to ensure heavy-duty pressing or forming operations hit their precise depth target.
Heavy Payload Handling
Leverage the 8590N push force at 0.7MPa to move heavy pallets or industrial components, using the adjustable stop to set safe travel limits.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X125-30 the Right Cylinder?
Choose this 125mm bore adjustable-stroke model when your application requires high thrust forces up to 6136N at 0.5MPa alongside variable end-stop positioning. If your force requirements are lower, stepping down to an 80mm bore yields 2268N of pull force at 0.5MPa, while keeping the same ISO 15552 mounting interface. The SAIJ125X125-30 is selected over a fixed-stroke SAI cylinder when machine setups demand frequent product-size changeovers or precise end-position calibration.
When matching an ISO 15552 replacement, verify a 125mm bore, 125mm stroke, 30mm adjustment range, PT port thread, and the correct mounting accessory from the SAIJ subset (Basic, FA, LB, TC, FTC, TCM1, TCM2). Because this is a profile cylinder with a 32mm rod and M27x2 thread, it handles significant side loads, though any long unsupported stroke still requires an external guide. Note that without a magnet (-S), this unit does not support CMSE or DMSE sensors.
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 SAIJ125X125-30 FAQ
At 0.5MPa, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. At 0.7MPa, the push force increases to 8590N.
The rear adjuster screw acts as a mechanical stop that shortens the 125mm nominal stroke by up to 30mm, providing a usable travel window of 95-125mm. It sets the travel end and deceleration but does not lock or hold 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 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 SAIJ125X125-30
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.