Airtac SAIJ125 Adjustable Cylinder SAIJ125AX125-75
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX125-75 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 SAIJ125AX125-75
The AirTAC SAIJ125X125-75 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster that allows you to trim the retract travel back by up to 75 mm. This creates a usable end-position window spanning 50 to 125 mm, letting you dial in the exact stroke length during commissioning without swapping out the barrel or bolting on external stops. Built with a SUS420J2 stainless steel rod (material code A), it handles aggressive environments better than standard carbon steel.
Delivering 6136 N of pull force at 0.5 MPa and 8590 N at 0.7 MPa, this 125 mm bore actuator is built for heavy-duty positioning. It uses PT tapered G1/2 ports and includes adjustable air cushions at both ends to manage kinetic energy. The rear adjuster acts purely as a mechanical stop to set the travel end and deceleration point; it does not hold the load without live air pressure. For load-holding requirements without continuous air supply, consider the SAIL or BSAI series.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX125-75 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX125-75 |
|---|---|
| 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 SAIJ125AX125-75
| 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 SAIJ125AX125-75 Is Used
Machine Changeover
Quickly fine-tune the 50-125 mm stroke window when switching product sizes on a packaging line, avoiding physical hardware swaps.
Heavy Press Positioning
Leverage 8590 N of thrust at 0.7 MPa to securely press components, using the rear stopper to set exact retraction depths.
Variable End-Stop Setup
Dial in the exact retract position during initial commissioning, using the 75 mm adjustment range to clear mechanical obstructions.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX125-75 the Right Cylinder?
Select this 125 mm bore model when your application requires high thrust—such as 6136 N pull at 0.5 MPa—and a variable retract distance between 50 and 125 mm. If your process demands less force, stepping down to a 100 mm bore yields 3681 N pull at 0.5 MPa, whereas moving up to a 160 mm bore provides 9425 N pull. Choose this adjustable variant over a fixed SAI cylinder when you need precise end-position tuning during machine setup or product changeover. It supports a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR. Because the nominal stroke is 125 mm, side-load risks are minimal, but an external guide remains recommended for heavy radial loads. Ensure your setup matches the PT G1/2 port and 30-500 mm/s speed range.
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 SAIJ125AX125-75 FAQ
At 0.5 MPa it provides 6136 N pull and 5734 N push. At 0.7 MPa it delivers 8590 N push, reaching a maximum of 1251 kgf (12266 N) at 1.0 MPa.
The nominal stroke is 125 mm with a 75 mm rear adjuster, creating a usable travel window of 50 to 125 mm. The adjuster acts as a mechanical stop and does not lock the load without 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 SAIJ125AX125-75
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.