Airtac SAIJ125 Adjustable Cylinder SAIJ125AX500-10S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX500-10S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 500mm 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
- Stroke500 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX500-10S
The AirTAC SAIJ125X500-10-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers 6136N of push force and 5734N of pull force at 0.5 MPa, featuring a 32mm SUS420J2 stainless steel rod. The integrated -S magnet enables position detection with AirTAC CMSE reed and DMSE electronic sensors.
This model provides a 490-500mm usable travel window, allowing precise 10mm end-position tuning during commissioning. It uses PT tapered ports and includes variable air cushions at both ends to decelerate heavy loads smoothly over the 500mm stroke.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX500-10S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX500-10S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 500 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 SAIJ125AX500-10S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×500 | 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 SAIJ125AX500-10S Is Used
Heavy Press Tuning
Dial in the exact 490-500mm end-stop for high-thrust pressing tasks without swapping cylinders or re-engineering external stop blocks.
Product Changeover
Quickly adjust the retract position by up to 10mm during automated line format changes to accommodate slightly different workpiece heights.
Long-Stroke Handling
Move heavy components along a 500mm path while relying on the dual air cushions and SUS420J2 rod to manage deceleration and durability.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX500-10S the Right Cylinder?
Choose this 125mm bore when a 100mm cylinder (offering 3927N push at 0.5MPa) lacks thrust, but a 160mm bore is physically too large. The 10mm rear adjuster allows you to dial in the exact retract stop without adding external physical stops, which is ideal for machine changeovers. For any 500mm stroke, the extended travel increases susceptibility to side-loading, so an external guide is recommended to protect the rod seals.
The rear adjuster acts strictly as a travel stop and does not hold the load without live air pressure. If your application requires true load-holding in the event of air loss, consider the SAIL pneumatic lock or BSAI clamp-lock series. This SAIJ cylinder is dimensionally interchangeable per ISO 15552 and uses the reduced SAIJ mounting set: Basic, FA, LB, TC, FTC, TCM1, and TCM2.
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 SAIJ125AX500-10S FAQ
At 0.5 MPa operating pressure, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. At 0.7 MPa, the push force increases to 8590N.
The rear adjuster screw allows you to shorten the nominal 500mm stroke by up to 10mm, creating a 490-500mm travel window. It functions as a mechanical stop for end-position tuning and does not lock the load without continuous air pressure.
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