Airtac SAIJ125 Adjustable Cylinder SAIJ125AX55-30S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX55-30S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 55mm 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
- Stroke55 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX55-30S
The AirTAC SAIJ125X55-30-S is a double-acting ISO 15552 profile cylinder featuring a 125mm bore and a 55mm nominal stroke. A rear adjusting screw allows you to trim the retract travel by up to 30mm, creating a precise 25-55mm usable stroke window for exact end-position tuning during commissioning. It delivers 6136N of push force at 0.5MPa and includes a -S magnet for use with CMSE reed and DMSE solid-state sensors.
This unit uses a SUS420J2 stainless steel rod (material code A) and PT tapered port threads. The extruded aluminum barrel incorporates sensor grooves on both sides. Mounting options cover the SAIJ subset (Basic, FA, LB, TC, FTC, TCM1, TCM2), omitting FB, CA, CB, and CR. The rear adjuster acts purely as a mechanical stop for deceleration, not a lock, so live air is required to hold the load.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX55-30S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX55-30S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 55 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 SAIJ125AX55-30S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×55 | 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 SAIJ125AX55-30S Is Used
Product Changeovers
Dial in the 25-55mm stroke window on the fly to accommodate different product lengths without changing the cylinder.
End-Position Tuning
Use the rear stopper to fine-tune the retract distance during machine setup, ensuring exact alignment for high-force operations.
Heavy Assembly Lines
Leverage the 6136N push force at 0.5MPa for pressing or lifting tasks while relying on the adjustable stop for precise travel limits.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX55-30S the Right Cylinder?
Choose this 125mm bore if your application requires higher force than the 100mm option (3927N push at 0.5MPa) but less than the 200mm class. An adjustable stroke is selected over a fixed SAI cylinder when you need variable end-stops for product changeovers without swapping hardware. For load-holding without live air pressure, consider a SAIL or BSAI cylinder instead. To match this ISO 15552 interchangeable replacement, specify 125mm bore, 55mm stroke, 30mm adjustment, PT G1/2 port, and the -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 SAIJ125AX55-30S FAQ
The rear adjuster screw lets you shorten the 55mm nominal stroke by up to 30mm, providing a usable travel window of 25-55mm for fine-tuning the retract end position without external stops.
At 0.5MPa operating pressure, it provides 6136N of push force and 5734N of pull force. It can reach up to 11045N push force at 0.9MPa.
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 SAIJ125AX55-30S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.