Airtac SAIJ125 Adjustable Cylinder SAIJ125AX135-30
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX135-30 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 135mm 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
- Stroke135 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX135-30
The AirTAC SAIJ125X135-30 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a 105 to 135 mm usable travel window, allowing you to dial back the nominal 135 mm stroke by up to 30 mm during commissioning. Delivering 6136 N of push force at 0.5 MPa, it is built for heavy-duty positioning.
This variant uses a SUS420J2 stainless steel piston rod (material code A) for superior corrosion resistance and includes PT tapered port threads. The mounting interface covers Basic, FA, LB, TC, FTC, TCM1, and TCM2 options, deliberately omitting FB, CA, CB, and CR setups. Note that the rear adjuster acts purely as a travel stop to fine-tune deceleration, not as a load-holding lock.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX135-30 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX135-30 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 135 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 SAIJ125AX135-30
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×135 | 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 SAIJ125AX135-30 Is Used
Machine Changeover
Rapidly reconfigure the end-of-stroke position for different product sizes on a packaging line without disassembling the pneumatic setup.
End-Position Tuning
Fine-tune the retract position during initial commissioning to perfect mechanical timing and absorb mechanical tolerances in fixtures.
Heavy Load Positioning
Leverage the 6136 N push force to move substantial jigs or materials into place, using the adjuster to set the exact retract endpoint.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX135-30 the Right Cylinder?
Select this 125 mm bore when an 80 mm bore (providing 2513 N push at 0.5 MPa) is insufficient for your load, but a 160 mm bore is oversized. The 30 mm adjustable window is perfect for product changeovers on a line, letting you shift the end-stop without physically swapping the cylinder or adding external stopper blocks. For any load-holding requirements without live air pressure, this standard SAIJ is insufficient; you should explore an SAIL air-released lock, a BSAI clamp-lock, or an external pilot-operated check valve instead.
When replacing an ISO 15552 cylinder, match the 125 mm bore, 135 mm nominal stroke, 30 mm adjustment range, PT port thread, and your required mounting style. Because the nominal stroke is 135 mm, the 32 mm rod and M27x2 rod thread provide robust stability, though any application approaching the maximum standard stroke limits should still use an external guide to manage side loads.
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 SAIJ125AX135-30 FAQ
At a 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. At 0.9 MPa, the push force increases to 11045 N.
The rear adjuster screw allows you to shorten the effective stroke by up to 30 mm, creating a usable travel window of 105 to 135 mm. This stopper fine-tunes the end position but does not hold the load without live 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 SAIJ125AX135-30
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.