Airtac SAIJ125 Adjustable Cylinder SAIJ125AX85-10
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX85-10 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 85mm 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
- Stroke85 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX85-10
The AirTAC SAIJ125X85-10 is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers 6136N of thrust at 0.5 MPa and features a usable travel window of 75 to 85 mm, letting you trim up to 10 mm off the nominal stroke during machine setup. The extruded aluminum barrel includes sensor grooves on both sides, and this specific configuration uses a SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance.
By turning the external rear stopper, you can fine-tune the retract end position at commissioning without swapping the cylinder or adding external stops. The adjuster acts purely as a travel stop to set the end-of-stroke deceleration alongside the variable air cushions; it does not hold the load without live air. For load-holding without continuous pressure, consider the SAIL or BSAI variants.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX85-10 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX85-10 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 85 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 SAIJ125AX85-10
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×85 | 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 SAIJ125AX85-10 Is Used
Position Fine-Tuning
Dial in the exact retract distance within a 75-85 mm window during machine commissioning to perfect product placement without hardware changes.
Line Changeover
Quickly adapt the cylinder's end-stop for different product sizes on a packaging line, leveraging the 10 mm adjustment range for rapid setup.
Heavy Forming Operations
Utilize the 6136N thrust at 0.5 MPa for pressing or clamping tasks, relying on the SUS420J2 stainless rod for durability in demanding environments.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX85-10 the Right Cylinder?
Choose this 125 mm bore when you need heavy thrust (6136N push at 0.5 MPa) but want the flexibility to dial in a 75-85 mm travel window. If your application requires less force, stepping down to an 80 mm bore provides 2513N, whereas moving up to a 160 mm bore yields 10053N. The adjustable stroke is ideal for product-size changeovers on a line, providing a variable end-stop that a fixed-stroke SAI cylinder cannot offer.
When replacing an ISO 15552 cylinder, match the 125 mm bore, 85 mm stroke, 10 mm adjustment, PT tapered port threads, and the Basic, FA, LB, TC, FTC, TCM1, or TCM2 mounting set. This model lacks a magnet, so it cannot host CMSE or DMSE sensors without adding the -S option. Since the stroke is 85 mm, side-load is minimal, but long unsupported loads should still use an external guide.
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 SAIJ125AX85-10 FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136N of push force and 5734N of pull force. At 0.9 MPa, the push force increases to 11045N.
The rear adjuster acts as an external stopper, allowing you to shorten the effective stroke from 85 mm down to 75 mm. It sets the travel end and deceleration but does not lock or hold the load without live air pressure.
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