Airtac SAIJ125 Adjustable Cylinder SAIJ125AX500-10
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX500-10 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 SAIJ125AX500-10
The AirTAC SAIJ125X500-10 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a 490 to 500 mm usable travel window, allowing you to trim the retract position by up to 10 mm during commissioning. Operating at 0.5 MPa, it delivers 6136 N of pull force, making it suited for heavy-duty positioning tasks.
This SKU uses a SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance. It features PT tapered ports (G1/2) and runs at a maximum speed of 30-500 mm/s. The extruded aluminum barrel includes sensor grooves on both sides, though this specific configuration ships without a magnet for electronic DMSE or reed CMSE switches.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX500-10 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX500-10 |
|---|---|
| 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 SAIJ125AX500-10
| 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 SAIJ125AX500-10 Is Used
Machine Changeover
Dial in the 490-500 mm retract position during product size changes without swapping the cylinder or reworking external stop blocks.
Heavy-Duty Positioning
Leverage 6136 N of pull force at 0.5 MPa to move heavy pallets or tooling carriages, using the adjuster to fine-tune the end stop.
Assembly Line Tuning
Trim up to 10 mm of stroke during commissioning to perfectly align heavy press fixtures without altering the pneumatic plumbing.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX500-10 the Right Cylinder?
Choose this 125 mm bore when an 80 mm bore (providing 2268 N pull at 0.5 MPa) is insufficient for your load. The 10 mm rear adjuster allows fine end-position tuning without adding external mechanical stops, which is ideal for machine setup and product changeover. For a fixed end-position, the standard SAI cylinder is a simpler alternative.
When replacing an ISO 15552 cylinder, match the 125 mm bore, 500 mm stroke, PT port thread, and the reduced SAIJ mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2). Because the 500 mm stroke is long, an external guide is recommended to prevent rod side-loading. Note that the rear adjuster acts only as a travel stop; it does not hold the load without live air. For load-holding, 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 SAIJ125AX500-10 FAQ
At 0.5 MPa, this 125 mm bore cylinder provides 6136 N of pull force and 8590 N of push force. At 0.9 MPa, the push force reaches 11045 N.
The rear adjuster acts as an external stop, allowing you to shorten the 500 mm nominal stroke by up to 10 mm, creating a 490-500 mm travel window. It is a travel stop, not a lock, and will not hold the load without live air pressure.
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Covers non-human-caused product damage.
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Standard models usually ship in 3-4 days.
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