Airtac SAIJ125 Adjustable Cylinder SAIJ125X35-30S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X35-30S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 35mm 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
- Stroke35 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X35-30S
The AirTAC SAIJ125X35-30-S 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 provides a usable travel window of 5 to 35 mm, letting you dial in the exact end position without swapping hardware. The extruded aluminum barrel features sensor grooves on both sides, and the integrated -S magnet works seamlessly with AirTAC CMSE reed and DMSE electronic solid-state switches.
This unit uses a carbon steel piston rod and PT tapered port threads. The rear adjuster acts purely as a mechanical stop to set deceleration and travel limits; it does not hold the load without live air. For load-holding requirements without continuous pressure, consider the SAIL or BSAI series instead.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X35-30S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X35-30S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 35 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 SAIJ125X35-30S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×35 | 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 SAIJ125X35-30S Is Used
Short-Stroke Clamping
Dial in the exact clamping force on variable-thickness parts using the 5 to 35 mm travel window during machine setup.
End-Position Tuning
Fine-tune the retract stop at commissioning without swapping out the entire cylinder or adding external shims.
Product Changeover
Quickly adjust the end-stop position on a production line when switching between different product sizes.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X35-30S the Right Cylinder?
Choose this 125mm bore when you need heavy thrust—6136N at 0.5 MPa or 8590N at 0.7 MPa—stepping up from a 100mm bore that yields 3927N at 0.5 MPa. The adjustable 5 to 35 mm travel window is ideal for fine-tuning short clamping or positioning moves at commissioning, avoiding the need for external stop blocks. To replace an ISO 15552 cylinder, match the 125mm bore, 35mm stroke, 30mm adjustment, G1/2 port, and -S magnet.
Because the stroke is short, side-load risks are minimal, but always ensure the load is guided to prevent rod binding. Mounting options include 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 SAIJ125X35-30S 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 lets you trim the nominal 35mm stroke back by up to 30mm, creating a usable travel window of 5 to 35mm. The adjuster acts as a mechanical stop to set the end position and is not a lock.
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