Airtac SAIJ125 Adjustable Cylinder SAIJ125AX450-100S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX450-100S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 450mm 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
- Stroke450 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX450-100S
The AirTAC SAIJ125X450-100-S is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a nominal 450mm travel that can be dialed back by up to 100mm, giving operators a 350-450mm usable window for precise end-position tuning during commissioning. In the 125mm bore class, it generates 6136N of push force and 5734N of pull force at 0.5 MPa, fitting heavy-duty automation requirements.
This variant includes a SUS420J2 stainless steel rod (option A) for improved corrosion resistance and ships with a magnet (-S) for CMSE reed and DMSE electronic sensors. The extruded aluminum barrel features sensor grooves on both sides for flexible switch mounting. Because the 450mm stroke is substantial, the 32mm rod diameter and M27x2 thread provide robust rigidity, though an external guide is still recommended to manage side loads on extended travels.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX450-100S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX450-100S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 450 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 SAIJ125AX450-100S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×450 | 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 SAIJ125AX450-100S Is Used
Product Changeover Tuning
Dial the stroke back by up to 100mm to accommodate different product lengths on a manufacturing line without disassembling the cylinder setup.
Machine Commissioning
Fine-tune the 350-450mm travel window during initial machine setup to perfectly align heavy 125mm bore actuators with downstream processes.
Heavy Material Handling
Leverage 6136N of push force at 0.5 MPa to move substantial pallets or chassis, using the rear stopper to set exact positioning limits.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX450-100S the Right Cylinder?
Select this 125mm bore model when an application requires heavy thrust beyond the 3927N push force of a 100mm cylinder, but less than the 10053N output of a 160mm bore. The integrated 100mm adjustment range is ideal for product changeovers on a line, allowing you to shift the end-stop without physically swapping the cylinder or adding external mechanical stops. It uses a PT tapered port thread and supports a speed range of 30-500 mm/s.
When replacing an ISO 15552 cylinder, match the 125mm bore, 450mm stroke, 100mm adjustment, PT port, and -S magnet. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR. Note that the rear adjuster acts purely as a travel stop to decelerate the load alongside the air cushions; it does not hold the load without live air. For true load-holding without pressure, consider the SAIL or BSAI series.
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 SAIJ125AX450-100S FAQ
At 0.5 MPa operating pressure, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. At the maximum 1.0 MPa pressure, it can deliver up to 1251 kgf.
The rear adjuster screw acts as an external stopper that shortens the effective travel from the 450mm nominal stroke, creating a 350-450mm usable window. It sets the end position 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 SAIJ125AX450-100S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.